Evaluation of the Stability of Trimethyl Phosphate as a Li鈥揙2 Battery Electrolyte via Multinuclear Solid-State NMR

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• 作者：Zo毛 E. M. Reeve ; Allen D. Pauric ; Kristopher J. Harris ; Gillian R. Goward
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：December 3, 2015
• 年：2015
• 卷：119
• 期：48
• 页码：26840-26848
• 全文大小：453K
• ISSN：1932-7455

文摘

Solid-state ¹⁷O NMR was used to compare the stability of two potential Li鈥揙₂ electrolytes鈥攖etraethylene glycol dimethyl ether (TEGDME) and trimethyl phosphate (TMP). The TEGDME electrolyte demonstrated superior stability to the TMP electrolyte. Li₂O₂ and evidence of electrolyte breakdown was observed in the TEGDME cell, whereas only electrolyte breakdown products were discovered within the TMP cell. Potential decomposition pathways of TMP are proposed here that account for the formation of the discharge species observed in the ¹⁷O, ⁷Li, ¹H, and ³¹P solid-state NMR of the cycled cathodes.