The Experts below are selected from a list of 619710 Experts worldwide ranked by ideXlab platform
Grietus Mulder - One of the best experts on this subject based on the ideXlab platform.
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electrical double layer capacitors evaluation of ageing phenomena during Cycle Life testing
Journal of Applied Electrochemistry, 2014Co-Authors: Hamid Gualous, Ahmadou Samba, Grietus Mulder, Justin Salminen, Yousef Firouz, Mohamed Abdel MonemAbstract:This paper represents an assessment of the main ageing phenomena in electrical double-layer capacitors (EDLCs). In this study the Cycle Life of the EDLC cells with a rated capacitance of 1,600 F has been investigated at different ambient temperatures and current rates. From the experimental results we can observe that the impact of the high ambient temperature is significant on the Cycle Life of the cells. Moreover, the results also show the negative impact of the current rate. The internal resistance tests showed that the increase of the resistance is much higher than the decrease of the capacitance. Thus, the ageing of the EDLC during cycling was clearly non-linear. Further the EIS measurements indicated the higher increase of the imaginary part of the impedance at low frequencies during cycling, which indicates the capacitance fade.
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lithium iron phosphate based battery assessment of the aging parameters and development of Cycle Life model
Applied Energy, 2014Co-Authors: Mohamed Abdel Monem, Hamid Gaulous, Jelle Smekens, Justin Salminen, Omar Hegazy, Yousef Firouz, Grietus MulderAbstract:This paper represents the evaluation of ageing parameters in lithium iron phosphate based batteries, through investigating different current rates, working temperatures and depths of discharge. From these analyses, one can derive the impact of the working temperature on the battery performances over its Lifetime. At elevated temperature (40°C), the performances are less compared to at 25°C. The obtained mathematical expression of the Cycle Life as function of the operating temperature reveals that the well-known Arrhenius law cannot be applied to derive the battery Lifetime from one temperature to another.
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lithium iron phosphate based battery assessment of the aging parameters and development of Cycle Life model
Applied Energy, 2014Co-Authors: Mohamed Abdel Monem, Hamid Gaulous, Jelle Smekens, Noshin Omar, Justin Salminen, Omar Hegazy, Yousef Firouz, Grietus MulderAbstract:Abstract This paper represents the evaluation of ageing parameters in lithium iron phosphate based batteries, through investigating different current rates, working temperatures and depths of discharge. From these analyses, one can derive the impact of the working temperature on the battery performances over its Lifetime. At elevated temperature (40 °C), the performances are less compared to at 25 °C. The obtained mathematical expression of the Cycle Life as function of the operating temperature reveals that the well-known Arrhenius law cannot be applied to derive the battery Lifetime from one temperature to another. Moreover, a number of Cycle Life tests have been performed to illustrate the long-term capabilities of the proposed battery cells at different discharge constant current rates. The results reveal the harmful impact of high current rates on battery characteristics. On the other hand, the Cycle Life test at different depth of discharge levels indicates that the battery is able to perform 3221 Cycles (till 80% DoD) compared to 34,957 shallow Cycles (till 20% DoD). To investigate the Cycle Life capabilities of lithium iron phosphate based battery cells during fast charging, Cycle Life tests have been carried out at different constant charge current rates. The experimental analysis indicates that the Cycle Life of the battery degrades the more the charge current rate increases. From this analysis, one can conclude that the studied lithium iron based battery cells are not recommended to be charged at high current rates. This phenomenon affects the viability of ultra-fast charging systems. Finally, a Cycle Life model has been developed, which is able to predict the battery Cycleability accurately.
Mohamed Abdel Monem - One of the best experts on this subject based on the ideXlab platform.
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electrical double layer capacitors evaluation of ageing phenomena during Cycle Life testing
Journal of Applied Electrochemistry, 2014Co-Authors: Hamid Gualous, Ahmadou Samba, Grietus Mulder, Justin Salminen, Yousef Firouz, Mohamed Abdel MonemAbstract:This paper represents an assessment of the main ageing phenomena in electrical double-layer capacitors (EDLCs). In this study the Cycle Life of the EDLC cells with a rated capacitance of 1,600 F has been investigated at different ambient temperatures and current rates. From the experimental results we can observe that the impact of the high ambient temperature is significant on the Cycle Life of the cells. Moreover, the results also show the negative impact of the current rate. The internal resistance tests showed that the increase of the resistance is much higher than the decrease of the capacitance. Thus, the ageing of the EDLC during cycling was clearly non-linear. Further the EIS measurements indicated the higher increase of the imaginary part of the impedance at low frequencies during cycling, which indicates the capacitance fade.
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lithium iron phosphate based battery assessment of the aging parameters and development of Cycle Life model
Applied Energy, 2014Co-Authors: Mohamed Abdel Monem, Hamid Gaulous, Jelle Smekens, Justin Salminen, Omar Hegazy, Yousef Firouz, Grietus MulderAbstract:This paper represents the evaluation of ageing parameters in lithium iron phosphate based batteries, through investigating different current rates, working temperatures and depths of discharge. From these analyses, one can derive the impact of the working temperature on the battery performances over its Lifetime. At elevated temperature (40°C), the performances are less compared to at 25°C. The obtained mathematical expression of the Cycle Life as function of the operating temperature reveals that the well-known Arrhenius law cannot be applied to derive the battery Lifetime from one temperature to another.
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lithium iron phosphate based battery assessment of the aging parameters and development of Cycle Life model
Applied Energy, 2014Co-Authors: Mohamed Abdel Monem, Hamid Gaulous, Jelle Smekens, Noshin Omar, Justin Salminen, Omar Hegazy, Yousef Firouz, Grietus MulderAbstract:Abstract This paper represents the evaluation of ageing parameters in lithium iron phosphate based batteries, through investigating different current rates, working temperatures and depths of discharge. From these analyses, one can derive the impact of the working temperature on the battery performances over its Lifetime. At elevated temperature (40 °C), the performances are less compared to at 25 °C. The obtained mathematical expression of the Cycle Life as function of the operating temperature reveals that the well-known Arrhenius law cannot be applied to derive the battery Lifetime from one temperature to another. Moreover, a number of Cycle Life tests have been performed to illustrate the long-term capabilities of the proposed battery cells at different discharge constant current rates. The results reveal the harmful impact of high current rates on battery characteristics. On the other hand, the Cycle Life test at different depth of discharge levels indicates that the battery is able to perform 3221 Cycles (till 80% DoD) compared to 34,957 shallow Cycles (till 20% DoD). To investigate the Cycle Life capabilities of lithium iron phosphate based battery cells during fast charging, Cycle Life tests have been carried out at different constant charge current rates. The experimental analysis indicates that the Cycle Life of the battery degrades the more the charge current rate increases. From this analysis, one can conclude that the studied lithium iron based battery cells are not recommended to be charged at high current rates. This phenomenon affects the viability of ultra-fast charging systems. Finally, a Cycle Life model has been developed, which is able to predict the battery Cycleability accurately.
Noshin Omar - One of the best experts on this subject based on the ideXlab platform.
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lithium iron phosphate based battery assessment of the aging parameters and development of Cycle Life model
Applied Energy, 2014Co-Authors: Mohamed Abdel Monem, Hamid Gaulous, Jelle Smekens, Noshin Omar, Justin Salminen, Omar Hegazy, Yousef Firouz, Grietus MulderAbstract:Abstract This paper represents the evaluation of ageing parameters in lithium iron phosphate based batteries, through investigating different current rates, working temperatures and depths of discharge. From these analyses, one can derive the impact of the working temperature on the battery performances over its Lifetime. At elevated temperature (40 °C), the performances are less compared to at 25 °C. The obtained mathematical expression of the Cycle Life as function of the operating temperature reveals that the well-known Arrhenius law cannot be applied to derive the battery Lifetime from one temperature to another. Moreover, a number of Cycle Life tests have been performed to illustrate the long-term capabilities of the proposed battery cells at different discharge constant current rates. The results reveal the harmful impact of high current rates on battery characteristics. On the other hand, the Cycle Life test at different depth of discharge levels indicates that the battery is able to perform 3221 Cycles (till 80% DoD) compared to 34,957 shallow Cycles (till 20% DoD). To investigate the Cycle Life capabilities of lithium iron phosphate based battery cells during fast charging, Cycle Life tests have been carried out at different constant charge current rates. The experimental analysis indicates that the Cycle Life of the battery degrades the more the charge current rate increases. From this analysis, one can conclude that the studied lithium iron based battery cells are not recommended to be charged at high current rates. This phenomenon affects the viability of ultra-fast charging systems. Finally, a Cycle Life model has been developed, which is able to predict the battery Cycleability accurately.
Yi Cui - One of the best experts on this subject based on the ideXlab platform.
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sea sponge like structure of nano fe3o4 on skeleton c with long Cycle Life under high rate for li ion batteries
ACS Applied Materials & Interfaces, 2018Co-Authors: Shipei Chen, Yi Cui, Qingnan Wu, Ming Wen, Qingsheng Wu, Jiaqi Li, Nicola Pinna, Yafei Fan, Tong WuAbstract:To meet the demands of long Cycle Life under high rate for lithium-ion batteries, the advancement of anode materials with stable structural properties is necessarily demanded. Such promotion needs to design reasonable structure to facilitate the transportation of electron and lithium ions (Li+). Herein, a novel C/Fe3O4 sea-sponge-like structure was synthesized by ultrasonic spray pyrolysis following thermal decomposition process. On the basis of sea-sponge carbon (SSC) excellences in electronic conductivity and short Li+ diffusion pathway, nano-Fe3O4 anchored on stable SSC skeleton can deliver high electrochemical performance with long Cycle Life under high rate. During electrochemical cycling, well-dispersed nano-Fe3O4 in ∼6 nm not only averts excessive pulverization and is enveloped by solid electrolyte interphase film, but also increases Li+ diffusion efficiency. The much improved electrochemical properties showed a capacity of around 460 mAh g–1 at a high rate of 1.5C with a retention rate of 93%, whi...
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A high-rate and long Cycle Life aqueous electrolyte battery for grid-scale energy storage
Nature Communications, 2012Co-Authors: Mauro Pasta, Colin D. Wessells, Robert A Huggins, Yi CuiAbstract:New types of energy storage are needed in conjunction with the deployment of solar, wind and other volatile renewable energy sources and their integration with the electric grid. No existing energy storage technology can economically provide the power, Cycle Life and energy efficiency needed to respond to the costly short-term transients that arise from renewables and other aspects of grid operation. Here we demonstrate a new type of safe, fast, inexpensive, long-Life aqueous electrolyte battery, which relies on the insertion of potassium ions into a copper hexacyanoferrate cathode and a novel activated carbon/polypyrrole hybrid anode. The cathode reacts rapidly with very little hysteresis. The hybrid anode uses an electrochemically active additive to tune its potential. This high-rate, high-efficiency cell has a 95% round-trip energy efficiency when Cycled at a 5C rate, and a 79% energy efficiency at 50C. It also has zero-capacity loss after 1,000 deep-discharge Cycles.
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Interconnected silicon hollow nanospheres for lithium-ion battery anodes with long Cycle Life
Nano Letters, 2011Co-Authors: Yan Yao, William D. Nix, Ill Ryu, Liangbing Hu, Matthew T Mcdowell, Hui Wu, Nian Liu, Yi CuiAbstract:Silicon is a promising candidate for the anode material in lithium-ion batteries due to its high theoretical specific capacity. However, volume changes during cycling cause pulverization and capacity fade, and improving Cycle Life is a major research challenge. Here, we report a novel interconnected Si hollow nanosphere electrode that is capable of accommodating large volume changes without pulverization during cycling. We achieved the high initial discharge capacity of 2725 mAh g–1 with less than 8% capacity degradation every hundred Cycles for 700 total Cycles. Si hollow sphere electrodes also show a Coulombic efficiency of 99.5% in later Cycles. Superior rate capability is demonstrated and attributed to fast lithium diffusion in the interconnected Si hollow structure.
Justin Salminen - One of the best experts on this subject based on the ideXlab platform.
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electrical double layer capacitors evaluation of ageing phenomena during Cycle Life testing
Journal of Applied Electrochemistry, 2014Co-Authors: Hamid Gualous, Ahmadou Samba, Grietus Mulder, Justin Salminen, Yousef Firouz, Mohamed Abdel MonemAbstract:This paper represents an assessment of the main ageing phenomena in electrical double-layer capacitors (EDLCs). In this study the Cycle Life of the EDLC cells with a rated capacitance of 1,600 F has been investigated at different ambient temperatures and current rates. From the experimental results we can observe that the impact of the high ambient temperature is significant on the Cycle Life of the cells. Moreover, the results also show the negative impact of the current rate. The internal resistance tests showed that the increase of the resistance is much higher than the decrease of the capacitance. Thus, the ageing of the EDLC during cycling was clearly non-linear. Further the EIS measurements indicated the higher increase of the imaginary part of the impedance at low frequencies during cycling, which indicates the capacitance fade.
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lithium iron phosphate based battery assessment of the aging parameters and development of Cycle Life model
Applied Energy, 2014Co-Authors: Mohamed Abdel Monem, Hamid Gaulous, Jelle Smekens, Justin Salminen, Omar Hegazy, Yousef Firouz, Grietus MulderAbstract:This paper represents the evaluation of ageing parameters in lithium iron phosphate based batteries, through investigating different current rates, working temperatures and depths of discharge. From these analyses, one can derive the impact of the working temperature on the battery performances over its Lifetime. At elevated temperature (40°C), the performances are less compared to at 25°C. The obtained mathematical expression of the Cycle Life as function of the operating temperature reveals that the well-known Arrhenius law cannot be applied to derive the battery Lifetime from one temperature to another.
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lithium iron phosphate based battery assessment of the aging parameters and development of Cycle Life model
Applied Energy, 2014Co-Authors: Mohamed Abdel Monem, Hamid Gaulous, Jelle Smekens, Noshin Omar, Justin Salminen, Omar Hegazy, Yousef Firouz, Grietus MulderAbstract:Abstract This paper represents the evaluation of ageing parameters in lithium iron phosphate based batteries, through investigating different current rates, working temperatures and depths of discharge. From these analyses, one can derive the impact of the working temperature on the battery performances over its Lifetime. At elevated temperature (40 °C), the performances are less compared to at 25 °C. The obtained mathematical expression of the Cycle Life as function of the operating temperature reveals that the well-known Arrhenius law cannot be applied to derive the battery Lifetime from one temperature to another. Moreover, a number of Cycle Life tests have been performed to illustrate the long-term capabilities of the proposed battery cells at different discharge constant current rates. The results reveal the harmful impact of high current rates on battery characteristics. On the other hand, the Cycle Life test at different depth of discharge levels indicates that the battery is able to perform 3221 Cycles (till 80% DoD) compared to 34,957 shallow Cycles (till 20% DoD). To investigate the Cycle Life capabilities of lithium iron phosphate based battery cells during fast charging, Cycle Life tests have been carried out at different constant charge current rates. The experimental analysis indicates that the Cycle Life of the battery degrades the more the charge current rate increases. From this analysis, one can conclude that the studied lithium iron based battery cells are not recommended to be charged at high current rates. This phenomenon affects the viability of ultra-fast charging systems. Finally, a Cycle Life model has been developed, which is able to predict the battery Cycleability accurately.
