Vinyl ethylene sulfite as a film-forming additive in propylene carbonate-based electrolyte for lithium ion batteries

Abstract

在当今能源危机的时代,锂离子电池由于具有更高的比功率、比能量等突出优势,已成为目前综合性能最好的电池体系之一。电解液是锂离子电池的重要组成部分,它在很大程度上影响着电池的电化学性能和安全性能。其中,碳酸丙烯酯(PC)是锂离子电池电解液中非常重要的溶剂,然而,当以PC为溶剂的电解液应用于含有石墨类电极材料的锂离子电池时,PC和溶剂化的锂离子会共同嵌入到石墨层间,导致石墨结构破坏,影响电池的电化学性能。 研究发现在PC基电极液中加入适当的添加剂能有效地解决上述问题。本论文选择了一种新的含有不饱和双键和亚硫酸酯双官能团的有机分子——乙烯基亚硫酸乙烯酯(VES),作为锂离子电池PC基电解液的添加剂。...In today's era of energy crisis, lithium ion battery has become the best battery system on integrated performance because it has the merits of high power density in volume and high specific energy. Electrolyte is a very important component for the lithium ion battery, it could greatly influence the electrochemical performance and the safety of the battery. Propylene carbonate (PC) is an attractive...学位:工学硕士院系专业:化学化工学院化学系_应用化学学号:2052006115202

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