Electrode Surface Film Formation in Tris(ethylene glycol)-Substituted Trimethylsilane鈥揕ithium Bis(oxalate)borate Electrolyte

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• 作者：Yuki Kusachi ; Zhengcheng Zhang ; Jian Dong ; Khalil Amine
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：December 8, 2011
• 年：2011
• 卷：115
• 期：48
• 页码：24013-24020
• 全文大小：1087K
• 年卷期：v.115,no.48(December 8, 2011)
• ISSN：1932-7455

文摘

One of the silicon-based electrolytes, tris(ethylene glycol)-substituted trimethylsilane (1NM3)鈥搇ithium bis(oxalate)borate (LiBOB), is studied as an electrolyte for the LiMn₂O₄ cathode and graphite anode cell. The solid electrolyte interface (SEI) characteristics and chemical components of both electrodes were investigated by X-ray photoelectron spectroscopy and X-ray diffraction. It was found that SEI components on the anode are similar to those using carbonate鈥揕iBOB electrolyte, which consists of lithium oxalate, lithium borooxalate, and Li_xBO_y. Moreover, we demonstrated that 1NM3鈥揕iPF₆ electrolyte, which lacks an SEI formation function, could not maintain the graphite structure during the electrochemical process. Therefore, it is evident that the 1NM3鈥揕iBOB combination and its suitable SEI film formation capability are vital to the lithium ion battery with graphite as the anode.