Li[(FSO2)(n-C4F9SO2)N] versus LiPF6 for graphite/LiCoO2 lithium-ion cells at both room and elevated temperatures: A comprehensive understanding with chemical, electrochemical and XPS analys
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- 作者：Liping Zheng ; Heng Zhang ; Pengfei Cheng ; Qiang Ma ; Juanjuan Liu ; Jin Nie ; Wenfang Feng ; Zhibin Zhou ; zb-zhou@mail.hust.edu.cn" class="auth_mail" title="E-mail the corresponding author
- 关键词：Lithium-ion batteries ; Nonaqueous liquid electrolyte ; Lithium (fluorosulfonyl)(n-nonafluorobutanesulfonyl)imide ; Lithium hexafluorophosphate ; Solid-electrolyte-interphase
- 刊名：Electrochimica Acta
- 出版年：2016
- 出版时间：1 April 2016
- 年：2016
- 卷：196
- 期：Complete
- 页码：169-188
- 全文大小：2434 K
文摘
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LiFNFSI-based electrolyte does not decompose after storage at 85 °C for two weeks.
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Decompositions of LiPF6-carbonate electrolyte would be initialized by the presence of trace amounts of HF and protic impurities.
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SEI films formed on graphite anode in the LiFNFSI-based electrolyte are majorly dominated by the reductive products of FNFSI− anions.
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Graphite/LiCoO2 cells with LiFNFSI show better higher-temperature storage, current-rate and cycling performances than those with LiPF6.