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Li Yang - One of the best experts on this subject based on the ideXlab platform.

  • Polymeric ionic liquid–ionic plastic crystal all-solid-state electrolytes for wide Operating Temperature Range lithium metal batteries
    Journal of Materials Chemistry, 2017
    Co-Authors: Xiaowei Li, Sijian Li, Zhengxi Zhang, Kaihua Yang, Li Yang
    Abstract:

    In developing all-solid-state polymer electrolytes for wide Operating Temperature Range lithium metal batteries, an exciting organic ionic plastic crystal, N-ethyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide (P12FSI), has been introduced into the pyrrolidinium-based polymeric ionic liquid (PIL)/LiTFSI solid system to obtain a novel class of PIL–P12FSI–LiTFSI solid polymer electrolytes (SPEs). Such SPEs reveal flexible mechanical characters, attractive room Temperature ionic conductivity above 10−4 S cm−1, and high thermal and electrochemical stability as well as potential to suppress the lithium dendrite growth. Particularly, Li/LiFePO4 cells assembled with the as-obtained SPE exhibit high discharge capacity and excellent cycle life over a broad Operating Temperature Range (25–80 °C) and good rate performance. This significant finding indicates that the SPE system obtained in our work has great potential for use in wide Operating Temperature Range lithium metal batteries.

  • polymeric ionic liquid ionic plastic crystal all solid state electrolytes for wide Operating Temperature Range lithium metal batteries
    Journal of Materials Chemistry, 2017
    Co-Authors: Xiaowei Li, Sijian Li, Zhengxi Zhang, Kaihua Yang, Li Yang
    Abstract:

    In developing all-solid-state polymer electrolytes for wide Operating Temperature Range lithium metal batteries, an exciting organic ionic plastic crystal, N-ethyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide (P12FSI), has been introduced into the pyrrolidinium-based polymeric ionic liquid (PIL)/LiTFSI solid system to obtain a novel class of PIL–P12FSI–LiTFSI solid polymer electrolytes (SPEs). Such SPEs reveal flexible mechanical characters, attractive room Temperature ionic conductivity above 10−4 S cm−1, and high thermal and electrochemical stability as well as potential to suppress the lithium dendrite growth. Particularly, Li/LiFePO4 cells assembled with the as-obtained SPE exhibit high discharge capacity and excellent cycle life over a broad Operating Temperature Range (25–80 °C) and good rate performance. This significant finding indicates that the SPE system obtained in our work has great potential for use in wide Operating Temperature Range lithium metal batteries.

  • Polymeric ionic liquid-ionic plastic crystal all-solid-state electrolytes for wide Operating Temperature Range lithium metal batteries
    J. Mater. Chem. A, 2017
    Co-Authors: Xiaowei Li, Sijian Li, Zhengxi Zhang, Kaihua Yang, Li Yang
    Abstract:

    In developing all-solid-state polymer electrolytes for wide Operating Temperature Range lithium metal batteries, an exciting organic ionic plastic crystal, N-ethyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide (P12FSI) has been introduced in the pyrrolidinium-based polymeric ionic...

Marshall C. Smart - One of the best experts on this subject based on the ideXlab platform.

  • Wide Operating Temperature Range Electrolytes for High Voltage and High Specific Energy Li-Ion Cells
    ECS Transactions, 2013
    Co-Authors: Marshall C. Smart, Constanza Hwang, J Soler, Frederick C Krause, Bugga V. Ratnakumar, William West, Khalil Amine
    Abstract:

    The Department of Energy (DoE) is interested in developing the needed energy storage technologies to enable plug-in hybrid electric vehicles (PHEVs) to meet the desired electric mileage Ranges. To meet these objectives, many groups have been developing high voltage, high capacity cathode materials to improve the specific energy of the current Li-ion technology. NASA also has interest in higher specific energy rechargeable batteries, especially for “human rated” applications. Argonne has developed a number of lithium-excess layered-layered metal oxide materials, with the composition of Li2MnO3-LiMO2 (M=Mn, Co, Ni), that have been demonstrated to provide over 250 mAh /g in many cases. Although these materials have been demonstrated to provide excellent specific capacity when cycled over a wide voltage Range (i.e., 2.0 to 4.80V), a number of technical challenges need to be overcome prior to its widespread adoption, including improving the rate capability of material and demonstrating the life characteristics when coupled with relevant carbon-based anodes. In addition, very few studies have addressed the capability of the material to operate over a wide Temperature Range, especially at lower Temperatures. In the current study, we have investigated a number of electrolyte formulations that have been designed to operate over a wide Temperature Range in conjunction with the layered-layered metal oxide cathode material developed at Argonne. Specifically, we have evaluated a number of electrolytes in Li-ion cells consisting of Conoco Phillips A12 graphite anodes and Toda HE5050 Li1.2Ni0.15Co0.10Mn0.55O2 cathodes. The electrolytes studied consisted of LiPF6 in carbonate-based electrolytes that contain ester co-solvents with various solid electrolyte interphase (SEI) promoting additives, many of which have been demonstrated to perform well in lower voltage systems. 5,6,7 For instance, we have investigated the performance of a number of methyl butyrate (MB) containing electrolytes (i.e., LiPF6 in ethylene carbonate (EC)+ ethyl methyl carbonate (EMC) + MB (20:20:60 v/v%) that contain various additives, including vinylene carbonate, lithium oxalate, mono-fluoroethylene carbonate (FEC) and LiBOB. In contrast to the bulk of the studies performed on the layered-layered composite metal oxide materials which have been evaluated against lithium metal, the current study was performed with electrochemically matched carbon anodes (graphite). In addition to evaluating the discharge rate capacity and the cycle life performance in a number of coin cells (CR2032 size), larger capacity three-electrode cells (equipped with lithium metal reference electrodes) were utilized to study the lithium kinetics of the respective electrodes by electrochemical techniques. In particular, both anodes and cathodes were subjected to a number of electrochemical measurements, including Electrochemical Impedance Spectroscopy (EIS), Tafel polarization, and linear micro-polarization measurements. These measurements were performed at a number of Temperatures to determine the relative kinetics, especially at low Temperatures. Upon performing Tafel polarization measurements on each electrode (which possess relatively heavy loadings), it was observed that the NMC-based cathode displayed poor lithium kinetics (limiting electrode) compared to the anode. Further, EIS measurements suggest that the charge-transfer kinetics of the cathode contributes significantly to the overall cell impedance and poor rate capability. When the cells were evaluated at various rates at low Temperatures, the methyl butyrate-based electrolytes resulted in improved rate capability compared to cells with an all carbonate-based formulation. However, based on the results obtained from EIS measurements, it appears as though the cathode kinetics is dominating the generally poor rate capability at low Temperature rather than the electrolyte type. In addition to investigating wide Operating Temperature Range electrolytes, some effort was devoted to evaluating electrolytes with flame retardant additives in conjunction with the high voltage system to demonstrate their compatibility.

  • wide Operating Temperature Range electrolytes for high voltage and high specific energy li ion cells
    Meeting Abstracts, 2013
    Co-Authors: Marshall C. Smart, Constanza Hwang, B V Ratnakumar, J Soler, Frederick C Krause, William West, Khalil Amine
    Abstract:

    A number of electrolyte formulations that have been designed to operate over a wide Temperature Range have been investigated in conjunction with layered-layered metal oxide cathode materials developed at Argonne. In this study, we have evaluated a number of electrolytes in Li-ion cells consisting of Conoco Phillips A12 graphite anodes and Toda HE5050 Li(1.2)Ni(0.15)Co(0.10)Mn(0.55)O2 cathodes. The electrolytes studied consisted of LiPF6 in carbonate-based electrolytes that contain ester co-solvents with various solid electrolyte interphase (SEI) promoting additives, many of which have been demonstrated to perform well in 4V systems. More specifically, we have investigated the performance of a number of methyl butyrate (MB) containing electrolytes (i.e., LiPF6 in ethylene carbonate (EC) + ethyl methyl carbonate (EMC) + MB (20:20:60 v/v %) that contain various additives, including vinylene carbonate, lithium oxalate, and lithium bis(oxalato)borate (LiBOB). When these systems were evaluated at various rates at low Temperatures, the methyl butyrate-based electrolytes resulted in improved rate capability compared to cells with all carbonate-based formulations. It was also ascertained that the slow cathode kinetics govern the generally poor rate capability at low Temperature in contrast to traditionally used LiNi(0.80)Co(0.15)Al(0.05)O2-based systems, rather than being influenced strongly by the electrolyte type.

  • Improved Wide Operating Temperature Range of Li-Ion Cells
    2013
    Co-Authors: Marshall C. Smart, Ratnakumar V. Bugga
    Abstract:

    Future NASA missions aimed at exploring the Moon, Mars, and the outer planets require rechargeable batteries that can operate over a wide Temperature Range (-60 to +60 C) to satisfy the requirements of various applications including landers, rovers, penetrators, CEV, CLV, etc. This work addresses the need for robust rechargeable batteries that can operate well over a wide Temperature Range. The Department of Energy (DoE) has identified a number of technical barriers associated with the development of Liion rechargeable batteries for PHEVs. For this reason, DoE has interest in the development of advanced electrolytes that will improve performance over a wide Range of Temperatures, and lead to long life characteristics (5,000 cycles over a 10-year life span). There is also interest in improving the high-voltage stability of these candidate electrolyte systems to enable the operation of up to 5 V with high specific energy cathode materials. Currently, the state-of-the-art lithium-ion system has been demonstrated to operate over a wide Range of Temperatures (-40 to +40 C); however, the rate capability at the lower Temperatures is very poor. In addition, the low-Temperature performance typically deteriorates rapidly upon being exposed to high Temperatures. A number of electrolyte formulations were developed that incorporate the use of electrolyte additives to improve the high-Temperature resilience, low-Temperature power capability, and life characteristics of methyl propionate (MP)-based electrolyte solutions. These electrolyte additives include mono-fluoroethylene carbonate (FEC), lithium oxalate, vinylene carbonate (VC), and lithium bis(oxalate borate) (LiBOB), which have previously been shown to result in improved high-Temperature resilience of all carbonate-based electrolytes. These MP-based electrolytes with additives have been shown to have improved performance in experiments with MCMB-LiNiCoAlO2 cells.

  • electrolytes for use in high energy lithium ion batteries with wide Operating Temperature Range
    2012
    Co-Authors: Marshall C. Smart, B V Ratnakumar, W C West, L D Whitcanack, C K Huang, J Soler, Frederick C Krause
    Abstract:

    Met programmatic milestones for program. Demonstrated improved performance with wide Operating Temperature electrolytes containing ester co-solvents (i.e., methyl butyrate) containing electrolyte additives in A123 prototype cells: Previously demonstrated excellent low Temperature performance, including 11C rates at -30 C and the ability to perform well down to -60 C. Excellent cycle life at room Temperature has been displayed, with over 5,000 cycles being demonstrated. Good high Temperature cycle life performance has also been achieved. Demonstrated improved performance with methyl propionate-containing electrolytes in large capacity prototype cells: Demonstrated the wide Operating Temperature Range capability in large cells (12 Ah), successfully scaling up technology from 0.25 Ah size cells. Demonstrated improved performance at low Temperature and good cycle life at 40 C with methyl propionate-based electrolyte containing increasing FEC content and the use of LiBOB as an additive. Utilized three-electrode cells to investigate the electrochemical characteristics of high voltage systems coupled with wide Operating Temperature Range electrolytes: From Tafel polarization measurements on each electrode, it is evident the NMC-based cathode displays poor lithium kinetics (being the limiting electrode). The MB-based formulations containing LiBOB delivered the best rate capability at low Temperature, which is attributed to improved cathode kinetics. Whereas, the use of lithium oxalate as an additive lead to the highest reversible capacity and lower irreversible losses.

  • Improved Wide Operating Temperature Range of LiNiCoAiO2-based Li-ion Cells with Methyl Propionate-based Electrolytes
    2012
    Co-Authors: Marshall C. Smart, Michael R. Tomcsi, Constanza Hwang, Larry Whitcanack, Ratnakumar V. Bugga, Mikito Nagata, Vince Visco, Hisashi Tsukamoto
    Abstract:

    Demonstration of wide Operating Temperature Range Li-ion electrolytes Methyl propionate-based wide Operating Temperature Range electrolytes were demonstrated to provide dramatic improvement of the low Temperature capability of Quallion prototype Li-ion cells (MCMB-LiNiCoAlO2). Some formulations were observed to deliver over 60% of the room Temperature capacity using a 5C rate at - 40oC !! Represents over a 4-fold improvement over the baseline electrolyte system. Demonstrated operational capability of a number of systems over a wide Temperature Range (-40 to +70 C) Demonstrated reasonably good long term cycle life performance at high Temperature (i.e., at +40deg and +50 C) A number of formulations containing electrolytes additives (i.e., FEC, VC, LiBOB, and lithium oxalate) have been shown to have enhanced lithium kinetics at low Temperature and promising high Temperature resilience. Demonstrated good performance in larger capacity (12 Ah) Quallion Li-ion cells with methyl propionate-based electrolytes. Current efforts focused upon performing life studies and the impact upon low Temperature capability.

Hansong Cheng - One of the best experts on this subject based on the ideXlab platform.

  • single ion polymer electrolyte membranes enable lithium ion batteries with a broad Operating Temperature Range
    Chemsuschem, 2014
    Co-Authors: Yunfeng Zhang, Jing Li, Hansong Cheng
    Abstract:

    Conductive processes involving lithium ions are analyzed in detail from a mechanistic perspective, and demonstrate that single ion polymeric electrolyte (SIPE) membranes can be used in lithium-ion batteries with a wide Operating Temperature Range (25-80 °C) through systematic optimization of electrodes and electrode/electrolyte interfaces, in sharp contrast to other batteries equipped with SIPE membranes that display appreciable operability only at elevated Temperatures (>60 °C). The performance is comparable to that of batteries using liquid electrolyte of inorganic salt, and the batteries exhibit excellent cycle life and rate performance. This significant widening of battery operation Temperatures coupled with the inherent flexibility and robustness of the SIPE membranes makes it possible to develop thin and flexible Li-ion batteries for a broad Range of applications. Language: en

  • Single‐Ion Polymer Electrolyte Membranes Enable Lithium‐Ion Batteries with a Broad Operating Temperature Range
    Chemsuschem, 2014
    Co-Authors: Yunfeng Zhang, Jing Li, Hansong Cheng
    Abstract:

    Conductive processes involving lithium ions are analyzed in detail from a mechanistic perspective, and demonstrate that single ion polymeric electrolyte (SIPE) membranes can be used in lithium-ion batteries with a wide Operating Temperature Range (25-80 °C) through systematic optimization of electrodes and electrode/electrolyte interfaces, in sharp contrast to other batteries equipped with SIPE membranes that display appreciable operability only at elevated Temperatures (>60 °C). The performance is comparable to that of batteries using liquid electrolyte of inorganic salt, and the batteries exhibit excellent cycle life and rate performance. This significant widening of battery operation Temperatures coupled with the inherent flexibility and robustness of the SIPE membranes makes it possible to develop thin and flexible Li-ion batteries for a broad Range of applications. Language: en

Xiaowei Li - One of the best experts on this subject based on the ideXlab platform.

  • Polymeric ionic liquid–ionic plastic crystal all-solid-state electrolytes for wide Operating Temperature Range lithium metal batteries
    Journal of Materials Chemistry, 2017
    Co-Authors: Xiaowei Li, Sijian Li, Zhengxi Zhang, Kaihua Yang, Li Yang
    Abstract:

    In developing all-solid-state polymer electrolytes for wide Operating Temperature Range lithium metal batteries, an exciting organic ionic plastic crystal, N-ethyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide (P12FSI), has been introduced into the pyrrolidinium-based polymeric ionic liquid (PIL)/LiTFSI solid system to obtain a novel class of PIL–P12FSI–LiTFSI solid polymer electrolytes (SPEs). Such SPEs reveal flexible mechanical characters, attractive room Temperature ionic conductivity above 10−4 S cm−1, and high thermal and electrochemical stability as well as potential to suppress the lithium dendrite growth. Particularly, Li/LiFePO4 cells assembled with the as-obtained SPE exhibit high discharge capacity and excellent cycle life over a broad Operating Temperature Range (25–80 °C) and good rate performance. This significant finding indicates that the SPE system obtained in our work has great potential for use in wide Operating Temperature Range lithium metal batteries.

  • polymeric ionic liquid ionic plastic crystal all solid state electrolytes for wide Operating Temperature Range lithium metal batteries
    Journal of Materials Chemistry, 2017
    Co-Authors: Xiaowei Li, Sijian Li, Zhengxi Zhang, Kaihua Yang, Li Yang
    Abstract:

    In developing all-solid-state polymer electrolytes for wide Operating Temperature Range lithium metal batteries, an exciting organic ionic plastic crystal, N-ethyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide (P12FSI), has been introduced into the pyrrolidinium-based polymeric ionic liquid (PIL)/LiTFSI solid system to obtain a novel class of PIL–P12FSI–LiTFSI solid polymer electrolytes (SPEs). Such SPEs reveal flexible mechanical characters, attractive room Temperature ionic conductivity above 10−4 S cm−1, and high thermal and electrochemical stability as well as potential to suppress the lithium dendrite growth. Particularly, Li/LiFePO4 cells assembled with the as-obtained SPE exhibit high discharge capacity and excellent cycle life over a broad Operating Temperature Range (25–80 °C) and good rate performance. This significant finding indicates that the SPE system obtained in our work has great potential for use in wide Operating Temperature Range lithium metal batteries.

  • Polymeric ionic liquid-ionic plastic crystal all-solid-state electrolytes for wide Operating Temperature Range lithium metal batteries
    J. Mater. Chem. A, 2017
    Co-Authors: Xiaowei Li, Sijian Li, Zhengxi Zhang, Kaihua Yang, Li Yang
    Abstract:

    In developing all-solid-state polymer electrolytes for wide Operating Temperature Range lithium metal batteries, an exciting organic ionic plastic crystal, N-ethyl-N-methylpyrrolidinium bis(fluorosulfonyl)imide (P12FSI) has been introduced in the pyrrolidinium-based polymeric ionic...

Yunfeng Zhang - One of the best experts on this subject based on the ideXlab platform.

  • single ion polymer electrolyte membranes enable lithium ion batteries with a broad Operating Temperature Range
    Chemsuschem, 2014
    Co-Authors: Yunfeng Zhang, Jing Li, Hansong Cheng
    Abstract:

    Conductive processes involving lithium ions are analyzed in detail from a mechanistic perspective, and demonstrate that single ion polymeric electrolyte (SIPE) membranes can be used in lithium-ion batteries with a wide Operating Temperature Range (25-80 °C) through systematic optimization of electrodes and electrode/electrolyte interfaces, in sharp contrast to other batteries equipped with SIPE membranes that display appreciable operability only at elevated Temperatures (>60 °C). The performance is comparable to that of batteries using liquid electrolyte of inorganic salt, and the batteries exhibit excellent cycle life and rate performance. This significant widening of battery operation Temperatures coupled with the inherent flexibility and robustness of the SIPE membranes makes it possible to develop thin and flexible Li-ion batteries for a broad Range of applications. Language: en

  • Single‐Ion Polymer Electrolyte Membranes Enable Lithium‐Ion Batteries with a Broad Operating Temperature Range
    Chemsuschem, 2014
    Co-Authors: Yunfeng Zhang, Jing Li, Hansong Cheng
    Abstract:

    Conductive processes involving lithium ions are analyzed in detail from a mechanistic perspective, and demonstrate that single ion polymeric electrolyte (SIPE) membranes can be used in lithium-ion batteries with a wide Operating Temperature Range (25-80 °C) through systematic optimization of electrodes and electrode/electrolyte interfaces, in sharp contrast to other batteries equipped with SIPE membranes that display appreciable operability only at elevated Temperatures (>60 °C). The performance is comparable to that of batteries using liquid electrolyte of inorganic salt, and the batteries exhibit excellent cycle life and rate performance. This significant widening of battery operation Temperatures coupled with the inherent flexibility and robustness of the SIPE membranes makes it possible to develop thin and flexible Li-ion batteries for a broad Range of applications. Language: en