Nonaqueous electrolytes play a key role in extending the operating temperature range of Li-ion batteries. In developing electrolytes for wide temperature operations, we adopted an approach of starting with thermally stable lithium tetrafluoroborate (LiBF4) and lithium bis(oxalato)borate (LiB(C2O4)(2), or LiBOB) salts. We have demonstrated that the capacity of Li-ion cells fades much slower in electrolytes using LiBF4 or LiBOB than in electrolytes using LiPF6. For low temperatures applications, suitable solvent systems for LiBF4 and LiBOB were explored. We found that the charge transfer resistance (R-ct) is smaller in Li-ion cells in electrolytes based on LiBF4 in selected solvent systems than that based on LiPF6 and results in better capacity utilization at low temperatures. We also found that the electrolytes based on LiBOB in PC-based solvent system would allow Li-ion cells with graphite anode to be cycled. By comparing the properties of LiBF4 and LiPF6 in the propylene carbonate and diethyl carbonate (PC-DEC) solvent system, we found that it is possible to formulate proper solvent mixtures for enhanced conductivity for LiBF4 and LiBOB salts at low temperatures. It is concluded that nonaqueous electrolytes for wide-temperature-range operations of Li-ion cells are achievable. Published by Elsevier Science B.V.
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Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USAUniv Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA
Sloop, SE
Pugh, JK
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Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USAUniv Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA
Pugh, JK
Wang, S
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Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USAUniv Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA
Wang, S
Kerr, JB
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Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USAUniv Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA
Kerr, JB
Kinoshita, K
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Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USAUniv Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA
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Toshiba Co Ltd, Power Supply Mat & Devices Lab, Ctr Corp Res & Dev, Tokyo 1400004, JapanToshiba Co Ltd, Power Supply Mat & Devices Lab, Ctr Corp Res & Dev, Tokyo 1400004, Japan
Takami, N
Ohsaki, T
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机构:Toshiba Co Ltd, Power Supply Mat & Devices Lab, Ctr Corp Res & Dev, Tokyo 1400004, Japan
Ohsaki, T
Hasebe, H
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机构:Toshiba Co Ltd, Power Supply Mat & Devices Lab, Ctr Corp Res & Dev, Tokyo 1400004, Japan
Hasebe, H
Yamamoto, M
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机构:Toshiba Co Ltd, Power Supply Mat & Devices Lab, Ctr Corp Res & Dev, Tokyo 1400004, Japan
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USA, Res Lab, Sensors & Electron Devices Directorate, Adelphi, MD 20783 USAUSA, Res Lab, Sensors & Electron Devices Directorate, Adelphi, MD 20783 USA
Zhang, SS
Xu, K
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USA, Res Lab, Sensors & Electron Devices Directorate, Adelphi, MD 20783 USAUSA, Res Lab, Sensors & Electron Devices Directorate, Adelphi, MD 20783 USA
Xu, K
Jow, TR
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USA, Res Lab, Sensors & Electron Devices Directorate, Adelphi, MD 20783 USAUSA, Res Lab, Sensors & Electron Devices Directorate, Adelphi, MD 20783 USA
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Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USAUniv Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA
Sloop, SE
Pugh, JK
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Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USAUniv Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA
Pugh, JK
Wang, S
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Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USAUniv Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA
Wang, S
Kerr, JB
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Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USAUniv Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA
Kerr, JB
Kinoshita, K
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Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USAUniv Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA
机构:
Toshiba Co Ltd, Power Supply Mat & Devices Lab, Ctr Corp Res & Dev, Tokyo 1400004, JapanToshiba Co Ltd, Power Supply Mat & Devices Lab, Ctr Corp Res & Dev, Tokyo 1400004, Japan
Takami, N
Ohsaki, T
论文数: 0引用数: 0
h-index: 0
机构:Toshiba Co Ltd, Power Supply Mat & Devices Lab, Ctr Corp Res & Dev, Tokyo 1400004, Japan
Ohsaki, T
Hasebe, H
论文数: 0引用数: 0
h-index: 0
机构:Toshiba Co Ltd, Power Supply Mat & Devices Lab, Ctr Corp Res & Dev, Tokyo 1400004, Japan
Hasebe, H
Yamamoto, M
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h-index: 0
机构:Toshiba Co Ltd, Power Supply Mat & Devices Lab, Ctr Corp Res & Dev, Tokyo 1400004, Japan
机构:
USA, Res Lab, Sensors & Electron Devices Directorate, Adelphi, MD 20783 USAUSA, Res Lab, Sensors & Electron Devices Directorate, Adelphi, MD 20783 USA
Zhang, SS
Xu, K
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h-index: 0
机构:
USA, Res Lab, Sensors & Electron Devices Directorate, Adelphi, MD 20783 USAUSA, Res Lab, Sensors & Electron Devices Directorate, Adelphi, MD 20783 USA
Xu, K
Jow, TR
论文数: 0引用数: 0
h-index: 0
机构:
USA, Res Lab, Sensors & Electron Devices Directorate, Adelphi, MD 20783 USAUSA, Res Lab, Sensors & Electron Devices Directorate, Adelphi, MD 20783 USA