We investigated the charge-discharge characteristics of the natural graphite negative electrode in N, N-diethyl-N-methyl-N-(2-methoxyethyl) ammonium bis (trifluoromethylsulfonyl) amide (DEME-TFSA) containing lithium ion as the electrolyte for non-flammable lithium-ion batteries. The charge-discharge tests showed that the discharge capacity was stably maintained at ca. 300 mAh g^-1 until the initial 10th cycle and the charge-discharge efficiencies reached ca. 100% after the initial cycles. The FE-SEM / EDX mapping results showed that the surface deposit (O, F, and S) deriving from DEME-TFSA was formed during the 1st charge. The XPS analysis results indicated that the surface deposit would compose of LiF, O, and S. It was found that the LiF-based compound containing O and S as a surface deposit was formed on the natural graphite electrode due to the cathodic decomposition of the TFSA^- anion as a side reaction during the 1st charge.

我们研究了天然石墨负极在含锂离子的N , N-二乙基-N-甲基-N- (2-甲氧基乙基)铵双(三氟甲基磺酰基)酰胺(DEME-TFSA)作为非电解液的充放电特性。 - 易燃锂离子电池。充放电测试表明，放电容量稳定地保持在ca。300 mAh g ^-1直到最初的第 10 个循环，充放电效率达到约。初始周期后 100%。FE-SEM / EDX 映射结果表明，源自 DEME-TFSA 的表面沉积物（O、F 和 S）在第 1 次充电期间形成。XPS 分析结果表明，表面沉积物由 LiF、O 和 S 组成。结果发现，由于石墨电极的阴极分解，在天然石墨电极上形成了含有 O 和 S 作为表面沉积物的 LiF 基化合物。 TFSA ^-在第一次充电期间作为副反应的阴离子。