The Experts below are selected from a list of 334476 Experts worldwide ranked by ideXlab platform
Jodie L. Lutkenhaus - One of the best experts on this subject based on the ideXlab platform.
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Branched aramid nanofiber-polyaniline electrodes for Structural Energy storage.
Nanoscale, 2020Co-Authors: Paraskevi Flouda, Dimitrios Loufakis, Alexander H. Quinn, Anish Patel, Dimitris C. Lagoudas, Jodie L. LutkenhausAbstract:Strong electrodes with good Energy storage capabilities are necessary to accommodate the current needs for Structural and flexible electronics. To this end, conjugated polymers such as polyaniline (PANI) have attracted much attention due to their exceptional Energy storage performance. However, PANI is typically brittle and requires the use of substrates for Structural support. Here, we report a strategy for developing free-standing Structural supercapacitor and battery electrodes based on PANI. More specifically, aniline is polymerized in the presence of branched aramid nanofibers (BANFs) and single walled carbon nanotubes (SWCNTs). This results in a network morphology that allows for efficient load transfer and electron transport, leading to electrodes with capacity values up to 128 ± 5 mA h g−1 (vs. a theoretical capacity of 147 mA h g−1), Young's modulus of 4 ± 0.5 GPa, and tensile strength of 40 ± 4 MPa. Furthermore, the charge storage mechanism is investigated, in which both Faradaic and non-Faradaic contributions are observed. This work demonstrates an efficient strategy for designing Structural electrodes based on conjugated polymers.
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Mechanically Strong Graphene/Aramid Nanofiber Composite Electrodes for Structural Energy and Power
ACS Nano, 2017Co-Authors: Ra Kwon, John E. Harris, Tianyang Zhou, Dimitrios Loufakis, James G. Boyd, Jodie L. LutkenhausAbstract:Structural Energy and power systems offer both mechanical and electrochemical performance in a single multifunctional platform. These are of growing interest because they potentially offer reduction in mass and/or volume for aircraft, satellites, and ground transportation. To this end, flexible graphene-based supercapacitors have attracted much attention due to their extraordinary mechanical and electrical properties, yet they suffer from poor strength. This problem may be exacerbated with the inclusion of functional guest materials, often yielding strengths of
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mechanically strong graphene aramid nanofiber composite electrodes for Structural Energy and power
ACS Nano, 2017Co-Authors: Se Ra Kwon, John E. Harris, Tianyang Zhou, Dimitrios Loufakis, James G. Boyd, Jodie L. LutkenhausAbstract:Structural Energy and power systems offer both mechanical and electrochemical performance in a single multifunctional platform. These are of growing interest because they potentially offer reduction in mass and/or volume for aircraft, satellites, and ground transportation. To this end, flexible graphene-based supercapacitors have attracted much attention due to their extraordinary mechanical and electrical properties, yet they suffer from poor strength. This problem may be exacerbated with the inclusion of functional guest materials, often yielding strengths of <15 MPa. Here, we show that graphene paper supercapacitor electrodes containing aramid nanofibers as guest materials exhibit extraordinarily high tensile strength (100.6 MPa) and excellent electrochemical stability. This is achieved by extensive hydrogen bonding and π–π interactions between the graphene sheets and aramid nanofibers. The trade-off between capacitance and mechanical properties is evaluated as a function of aramid nanofiber loading, w...
Mark L. Bundy - One of the best experts on this subject based on the ideXlab platform.
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Multifunctional Structural-Energy Storage Nanocomposites for Ultra Lightweight Micro Autonomous Vehicles
2013Co-Authors: Mark L. Bundy, Monica Rivera, Daniel P Cole, Shashi P KarnaAbstract:Abstract : A key concern in the design of micro autonomous vehicles is an onboard Energy supply that is able to satisfy system power requirements while also limiting the mass/volume burden to the platform. The conventional solution is to increase the Energy density of the power supply, typically a commercial battery. Another approach is to replace single-function Structural components with multifunctional Structural Energy storage materials to supplement the main power supply. Here we report on the use of flexible carbon nanotube (CNT)-based composites for multifunctional Structural Energy storage applications. Supercapacitors were fabricated from aligned and non-aligned CNT-based polymer composites and were subject to electrical and mechanical characterization. In addition, an electromechanical characterization technique was used to explore the multifunctional behavior of the solid-state flexible supercapacitors. Initial tests showed that the specific capacitance of the composite materials increased by approximately 10% as the structure was subject to a 2% mechanical strain. These preliminary results indicate that these multifunctional solid-state composites could potentially replace micro vehicle flexible Structural components, supplement system power requirements, and ultimately increase platform endurance.
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Lightweight carbon nanotube-based Structural-Energy storage devices for micro unmanned systems
Proceedings of SPIE - The International Society for Optical Engineering, 2012Co-Authors: Monica Rivera, Arava L.m. Reddy, Myung Gwan Hahm, Shashi P Karna, Pulickel Madhavapanicker Ajayan, Robert Vajtai, Daniel P Cole, Mark L. BundyAbstract:There is a strong need for small, lightweight Energy storage devices that can satisfy the ever increasing power and Energy demands of micro unmanned systems. Currently, most commercial and developmental micro unmanned systems utilize commercial-off-the-shelf (COTS) lithium polymer batteries for their Energy storage needs. While COTS lithium polymer batteries are the industry norm, the weight of these batteries can account for up to 60% of the overall system mass and the capacity of these batteries can limit mission durations to the order of only a few minutes. One method to increase vehicle endurance without adding mass or sacrificing payload capabilities is to incorporate multiple system functions into a single material or structure. For example, the body or chassis of a micro vehicle could be replaced with a multifunctional material that would serve as both the vehicle structure and the on-board Energy storage device. In this paper we present recent progress towards the development of carbon nanotube (CNT)-based Structural-Energy storage devices for micro unmanned systems. Randomly oriented and vertically aligned CNT-polymer composite electrodes with varying degrees of flexibility are used as the primary building blocks for lightweight Structural-supercapacitors. For the purpose of this study, the mechanical properties of the CNT-based electrodes and the charge-discharge behavior of the supercapacitor devices are examined. Because incorporating multifunctionality into a single component often degrades the properties or performance of individual structures, the performance and property tradeoffs of the CNT-based Structural-Energy storage devices will also be discussed.
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Characterization of Mechanical Properties in Multifunctional Structural-Energy Storage Nanocomposites for Lightweight Micro Autonomous Systems
ASME 2011 Conference on Smart Materials Adaptive Structures and Intelligent Systems Volume 1, 2011Co-Authors: Daniel P Cole, Monica Rivera, Mark L. BundyAbstract:A major concern in the design of micro-robotic systems is an on-board Energy supply capable of providing the necessary power requirements, while limiting the volume/mass burden to the vehicle. The conventional solution to this design problem is to maximize the Energy density of the on-board power supply. An alternative approach is to replace single-function Structural components with multifunctional Structural-Energy storage materials. The mass and volume savings associated with the material substitution could potentially result in improved endurance and/or increased payload (e.g. video camera, microphone, chemical/biological sensors). In this study, carbon nanotube (CNT) based composites were used to fabricate Structural-Energy storage materials. Specifically, supercapacitor electrodes were constructed from paper covered with CNT ink and from polymer matrices infused with aligned CNT forests. The composites were subject to bulk mechanical tests in order to characterize their suitability as Structural components in micro-autonomous systems. Tensile tests on the paper composites show directional and strain rate dependencies. The CNT-ink deposition process was found to degrade the elastic modulus of the paper by approximately 50%, although the tensile strength of the materials was largely unaffected. Preliminary electrical characterization of the CNT-coated electrode materials indicate that the nanomaterials potentially reach a percolation threshold after multiple depositions, resulting in a conductive surface network. Initial results indicate that improvements in the electrical properties of the CNT paper electrodes are met with reductions in the mechanical performance of the composites.Copyright © 2011 by ASME
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Electrical Properties of Carbon Nanomaterial-Based Structural-Energy Storage Devices
ASME 2011 Conference on Smart Materials Adaptive Structures and Intelligent Systems Volume 1, 2011Co-Authors: Monica Rivera, Daniel P Cole, Mark L. BundyAbstract:A major challenge in micro unmanned vehicle and, in particular, micro aerial vehicle development stems from the lack of suitable Energy storage devices. Demanding voltage and power requirements and stringent size and weight constraints significantly limit the number and type of batteries that can be housed in the micro vehicle structures. As a result, vehicle payloads and endurance times are significantly compromised. One approach to solving this issue would be to develop multifunctional Energy storage devices that are capable of supplying Energy to the vehicle while bearing some of the vehicle’s Structural loads. In doing so, the amount of mass available for payload and/or additional Energy storage devices can be increased. Recently, researchers have demonstrated the ability to produce lightweight, flexible batteries and supercapacitors based on carbon nanotubes and graphene. Due to their low mass, small size, and Energy storing potential, carbon nanomaterial-based Energy storage devices are excellent candidates for use in micro vehicle applications. However, due to the rapid pace in which the nanoscience field is advancing, there is limited information on how different materials, processing techniques, and device architectures influence the electrical properties of the device under investigation. In this study, we will systematically review these variables in an effort to discover how the materials and structure of the electrode and separator might be tailored to achieve both the desired material properties and the highest Energy density per device weight and volume.Copyright © 2011 by ASME
Dimitrios Loufakis - One of the best experts on this subject based on the ideXlab platform.
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Branched aramid nanofiber-polyaniline electrodes for Structural Energy storage.
Nanoscale, 2020Co-Authors: Paraskevi Flouda, Dimitrios Loufakis, Alexander H. Quinn, Anish Patel, Dimitris C. Lagoudas, Jodie L. LutkenhausAbstract:Strong electrodes with good Energy storage capabilities are necessary to accommodate the current needs for Structural and flexible electronics. To this end, conjugated polymers such as polyaniline (PANI) have attracted much attention due to their exceptional Energy storage performance. However, PANI is typically brittle and requires the use of substrates for Structural support. Here, we report a strategy for developing free-standing Structural supercapacitor and battery electrodes based on PANI. More specifically, aniline is polymerized in the presence of branched aramid nanofibers (BANFs) and single walled carbon nanotubes (SWCNTs). This results in a network morphology that allows for efficient load transfer and electron transport, leading to electrodes with capacity values up to 128 ± 5 mA h g−1 (vs. a theoretical capacity of 147 mA h g−1), Young's modulus of 4 ± 0.5 GPa, and tensile strength of 40 ± 4 MPa. Furthermore, the charge storage mechanism is investigated, in which both Faradaic and non-Faradaic contributions are observed. This work demonstrates an efficient strategy for designing Structural electrodes based on conjugated polymers.
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Mechanically Strong Graphene/Aramid Nanofiber Composite Electrodes for Structural Energy and Power
ACS Nano, 2017Co-Authors: Ra Kwon, John E. Harris, Tianyang Zhou, Dimitrios Loufakis, James G. Boyd, Jodie L. LutkenhausAbstract:Structural Energy and power systems offer both mechanical and electrochemical performance in a single multifunctional platform. These are of growing interest because they potentially offer reduction in mass and/or volume for aircraft, satellites, and ground transportation. To this end, flexible graphene-based supercapacitors have attracted much attention due to their extraordinary mechanical and electrical properties, yet they suffer from poor strength. This problem may be exacerbated with the inclusion of functional guest materials, often yielding strengths of
-
mechanically strong graphene aramid nanofiber composite electrodes for Structural Energy and power
ACS Nano, 2017Co-Authors: Se Ra Kwon, John E. Harris, Tianyang Zhou, Dimitrios Loufakis, James G. Boyd, Jodie L. LutkenhausAbstract:Structural Energy and power systems offer both mechanical and electrochemical performance in a single multifunctional platform. These are of growing interest because they potentially offer reduction in mass and/or volume for aircraft, satellites, and ground transportation. To this end, flexible graphene-based supercapacitors have attracted much attention due to their extraordinary mechanical and electrical properties, yet they suffer from poor strength. This problem may be exacerbated with the inclusion of functional guest materials, often yielding strengths of <15 MPa. Here, we show that graphene paper supercapacitor electrodes containing aramid nanofibers as guest materials exhibit extraordinarily high tensile strength (100.6 MPa) and excellent electrochemical stability. This is achieved by extensive hydrogen bonding and π–π interactions between the graphene sheets and aramid nanofibers. The trade-off between capacitance and mechanical properties is evaluated as a function of aramid nanofiber loading, w...
Monica Rivera - One of the best experts on this subject based on the ideXlab platform.
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Multifunctional Structural-Energy Storage Nanocomposites for Ultra Lightweight Micro Autonomous Vehicles
2013Co-Authors: Mark L. Bundy, Monica Rivera, Daniel P Cole, Shashi P KarnaAbstract:Abstract : A key concern in the design of micro autonomous vehicles is an onboard Energy supply that is able to satisfy system power requirements while also limiting the mass/volume burden to the platform. The conventional solution is to increase the Energy density of the power supply, typically a commercial battery. Another approach is to replace single-function Structural components with multifunctional Structural Energy storage materials to supplement the main power supply. Here we report on the use of flexible carbon nanotube (CNT)-based composites for multifunctional Structural Energy storage applications. Supercapacitors were fabricated from aligned and non-aligned CNT-based polymer composites and were subject to electrical and mechanical characterization. In addition, an electromechanical characterization technique was used to explore the multifunctional behavior of the solid-state flexible supercapacitors. Initial tests showed that the specific capacitance of the composite materials increased by approximately 10% as the structure was subject to a 2% mechanical strain. These preliminary results indicate that these multifunctional solid-state composites could potentially replace micro vehicle flexible Structural components, supplement system power requirements, and ultimately increase platform endurance.
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Lightweight carbon nanotube-based Structural-Energy storage devices for micro unmanned systems
Proceedings of SPIE - The International Society for Optical Engineering, 2012Co-Authors: Monica Rivera, Arava L.m. Reddy, Myung Gwan Hahm, Shashi P Karna, Pulickel Madhavapanicker Ajayan, Robert Vajtai, Daniel P Cole, Mark L. BundyAbstract:There is a strong need for small, lightweight Energy storage devices that can satisfy the ever increasing power and Energy demands of micro unmanned systems. Currently, most commercial and developmental micro unmanned systems utilize commercial-off-the-shelf (COTS) lithium polymer batteries for their Energy storage needs. While COTS lithium polymer batteries are the industry norm, the weight of these batteries can account for up to 60% of the overall system mass and the capacity of these batteries can limit mission durations to the order of only a few minutes. One method to increase vehicle endurance without adding mass or sacrificing payload capabilities is to incorporate multiple system functions into a single material or structure. For example, the body or chassis of a micro vehicle could be replaced with a multifunctional material that would serve as both the vehicle structure and the on-board Energy storage device. In this paper we present recent progress towards the development of carbon nanotube (CNT)-based Structural-Energy storage devices for micro unmanned systems. Randomly oriented and vertically aligned CNT-polymer composite electrodes with varying degrees of flexibility are used as the primary building blocks for lightweight Structural-supercapacitors. For the purpose of this study, the mechanical properties of the CNT-based electrodes and the charge-discharge behavior of the supercapacitor devices are examined. Because incorporating multifunctionality into a single component often degrades the properties or performance of individual structures, the performance and property tradeoffs of the CNT-based Structural-Energy storage devices will also be discussed.
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Characterization of Mechanical Properties in Multifunctional Structural-Energy Storage Nanocomposites for Lightweight Micro Autonomous Systems
ASME 2011 Conference on Smart Materials Adaptive Structures and Intelligent Systems Volume 1, 2011Co-Authors: Daniel P Cole, Monica Rivera, Mark L. BundyAbstract:A major concern in the design of micro-robotic systems is an on-board Energy supply capable of providing the necessary power requirements, while limiting the volume/mass burden to the vehicle. The conventional solution to this design problem is to maximize the Energy density of the on-board power supply. An alternative approach is to replace single-function Structural components with multifunctional Structural-Energy storage materials. The mass and volume savings associated with the material substitution could potentially result in improved endurance and/or increased payload (e.g. video camera, microphone, chemical/biological sensors). In this study, carbon nanotube (CNT) based composites were used to fabricate Structural-Energy storage materials. Specifically, supercapacitor electrodes were constructed from paper covered with CNT ink and from polymer matrices infused with aligned CNT forests. The composites were subject to bulk mechanical tests in order to characterize their suitability as Structural components in micro-autonomous systems. Tensile tests on the paper composites show directional and strain rate dependencies. The CNT-ink deposition process was found to degrade the elastic modulus of the paper by approximately 50%, although the tensile strength of the materials was largely unaffected. Preliminary electrical characterization of the CNT-coated electrode materials indicate that the nanomaterials potentially reach a percolation threshold after multiple depositions, resulting in a conductive surface network. Initial results indicate that improvements in the electrical properties of the CNT paper electrodes are met with reductions in the mechanical performance of the composites.Copyright © 2011 by ASME
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Electrical Properties of Carbon Nanomaterial-Based Structural-Energy Storage Devices
ASME 2011 Conference on Smart Materials Adaptive Structures and Intelligent Systems Volume 1, 2011Co-Authors: Monica Rivera, Daniel P Cole, Mark L. BundyAbstract:A major challenge in micro unmanned vehicle and, in particular, micro aerial vehicle development stems from the lack of suitable Energy storage devices. Demanding voltage and power requirements and stringent size and weight constraints significantly limit the number and type of batteries that can be housed in the micro vehicle structures. As a result, vehicle payloads and endurance times are significantly compromised. One approach to solving this issue would be to develop multifunctional Energy storage devices that are capable of supplying Energy to the vehicle while bearing some of the vehicle’s Structural loads. In doing so, the amount of mass available for payload and/or additional Energy storage devices can be increased. Recently, researchers have demonstrated the ability to produce lightweight, flexible batteries and supercapacitors based on carbon nanotubes and graphene. Due to their low mass, small size, and Energy storing potential, carbon nanomaterial-based Energy storage devices are excellent candidates for use in micro vehicle applications. However, due to the rapid pace in which the nanoscience field is advancing, there is limited information on how different materials, processing techniques, and device architectures influence the electrical properties of the device under investigation. In this study, we will systematically review these variables in an effort to discover how the materials and structure of the electrode and separator might be tailored to achieve both the desired material properties and the highest Energy density per device weight and volume.Copyright © 2011 by ASME
Daniel P Cole - One of the best experts on this subject based on the ideXlab platform.
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Multifunctional Structural-Energy Storage Nanocomposites for Ultra Lightweight Micro Autonomous Vehicles
2013Co-Authors: Mark L. Bundy, Monica Rivera, Daniel P Cole, Shashi P KarnaAbstract:Abstract : A key concern in the design of micro autonomous vehicles is an onboard Energy supply that is able to satisfy system power requirements while also limiting the mass/volume burden to the platform. The conventional solution is to increase the Energy density of the power supply, typically a commercial battery. Another approach is to replace single-function Structural components with multifunctional Structural Energy storage materials to supplement the main power supply. Here we report on the use of flexible carbon nanotube (CNT)-based composites for multifunctional Structural Energy storage applications. Supercapacitors were fabricated from aligned and non-aligned CNT-based polymer composites and were subject to electrical and mechanical characterization. In addition, an electromechanical characterization technique was used to explore the multifunctional behavior of the solid-state flexible supercapacitors. Initial tests showed that the specific capacitance of the composite materials increased by approximately 10% as the structure was subject to a 2% mechanical strain. These preliminary results indicate that these multifunctional solid-state composites could potentially replace micro vehicle flexible Structural components, supplement system power requirements, and ultimately increase platform endurance.
-
Lightweight carbon nanotube-based Structural-Energy storage devices for micro unmanned systems
Proceedings of SPIE - The International Society for Optical Engineering, 2012Co-Authors: Monica Rivera, Arava L.m. Reddy, Myung Gwan Hahm, Shashi P Karna, Pulickel Madhavapanicker Ajayan, Robert Vajtai, Daniel P Cole, Mark L. BundyAbstract:There is a strong need for small, lightweight Energy storage devices that can satisfy the ever increasing power and Energy demands of micro unmanned systems. Currently, most commercial and developmental micro unmanned systems utilize commercial-off-the-shelf (COTS) lithium polymer batteries for their Energy storage needs. While COTS lithium polymer batteries are the industry norm, the weight of these batteries can account for up to 60% of the overall system mass and the capacity of these batteries can limit mission durations to the order of only a few minutes. One method to increase vehicle endurance without adding mass or sacrificing payload capabilities is to incorporate multiple system functions into a single material or structure. For example, the body or chassis of a micro vehicle could be replaced with a multifunctional material that would serve as both the vehicle structure and the on-board Energy storage device. In this paper we present recent progress towards the development of carbon nanotube (CNT)-based Structural-Energy storage devices for micro unmanned systems. Randomly oriented and vertically aligned CNT-polymer composite electrodes with varying degrees of flexibility are used as the primary building blocks for lightweight Structural-supercapacitors. For the purpose of this study, the mechanical properties of the CNT-based electrodes and the charge-discharge behavior of the supercapacitor devices are examined. Because incorporating multifunctionality into a single component often degrades the properties or performance of individual structures, the performance and property tradeoffs of the CNT-based Structural-Energy storage devices will also be discussed.
-
Characterization of Mechanical Properties in Multifunctional Structural-Energy Storage Nanocomposites for Lightweight Micro Autonomous Systems
ASME 2011 Conference on Smart Materials Adaptive Structures and Intelligent Systems Volume 1, 2011Co-Authors: Daniel P Cole, Monica Rivera, Mark L. BundyAbstract:A major concern in the design of micro-robotic systems is an on-board Energy supply capable of providing the necessary power requirements, while limiting the volume/mass burden to the vehicle. The conventional solution to this design problem is to maximize the Energy density of the on-board power supply. An alternative approach is to replace single-function Structural components with multifunctional Structural-Energy storage materials. The mass and volume savings associated with the material substitution could potentially result in improved endurance and/or increased payload (e.g. video camera, microphone, chemical/biological sensors). In this study, carbon nanotube (CNT) based composites were used to fabricate Structural-Energy storage materials. Specifically, supercapacitor electrodes were constructed from paper covered with CNT ink and from polymer matrices infused with aligned CNT forests. The composites were subject to bulk mechanical tests in order to characterize their suitability as Structural components in micro-autonomous systems. Tensile tests on the paper composites show directional and strain rate dependencies. The CNT-ink deposition process was found to degrade the elastic modulus of the paper by approximately 50%, although the tensile strength of the materials was largely unaffected. Preliminary electrical characterization of the CNT-coated electrode materials indicate that the nanomaterials potentially reach a percolation threshold after multiple depositions, resulting in a conductive surface network. Initial results indicate that improvements in the electrical properties of the CNT paper electrodes are met with reductions in the mechanical performance of the composites.Copyright © 2011 by ASME
-
Electrical Properties of Carbon Nanomaterial-Based Structural-Energy Storage Devices
ASME 2011 Conference on Smart Materials Adaptive Structures and Intelligent Systems Volume 1, 2011Co-Authors: Monica Rivera, Daniel P Cole, Mark L. BundyAbstract:A major challenge in micro unmanned vehicle and, in particular, micro aerial vehicle development stems from the lack of suitable Energy storage devices. Demanding voltage and power requirements and stringent size and weight constraints significantly limit the number and type of batteries that can be housed in the micro vehicle structures. As a result, vehicle payloads and endurance times are significantly compromised. One approach to solving this issue would be to develop multifunctional Energy storage devices that are capable of supplying Energy to the vehicle while bearing some of the vehicle’s Structural loads. In doing so, the amount of mass available for payload and/or additional Energy storage devices can be increased. Recently, researchers have demonstrated the ability to produce lightweight, flexible batteries and supercapacitors based on carbon nanotubes and graphene. Due to their low mass, small size, and Energy storing potential, carbon nanomaterial-based Energy storage devices are excellent candidates for use in micro vehicle applications. However, due to the rapid pace in which the nanoscience field is advancing, there is limited information on how different materials, processing techniques, and device architectures influence the electrical properties of the device under investigation. In this study, we will systematically review these variables in an effort to discover how the materials and structure of the electrode and separator might be tailored to achieve both the desired material properties and the highest Energy density per device weight and volume.Copyright © 2011 by ASME
