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有机硼酸锂盐及亚硫酸酯类功能电解质材料

ISSN号：1005-281X
期刊名称：《化学进展》
时间：0
分类：TM911[电气工程—电力电子与电力传动] O646.1[理学—物理化学;理学—化学]
作者机构：[1]北京理工大学化工与环境学院环境科学工程北京重点实验室,北京100081, [2]国家高技术绿色材料发展中心,北京100081
相关基金：国家重点基础研究发展计划（973）项目（No.2009CB220100）、国家自然科学基金项目（No.20803003）、国际科技合作专项项目（No.2010DFB63370）和教育部新世纪优秀人才支持计划（No.NCET-10-00382006）资助

关键词：有机硼酸锂盐, 亚硫酸酯, 电解质, 锂离子电池, lithium organic borate salt, sulfite, electrolyte, lithium ion battery

中文摘要：

随着锂离子电池对高安全性、高容量、高功率等性能的技术需求,新型功能电解质材料的研究开发成为锂离子电池新材料领域研发工作的重点。本文对面向锂离子电池应用的功能电解质材料锂盐和添加剂的最新研究进展作了较为全面的阐述,其中重点介绍了本研究团队近年来在面向改善锂离子电池安全性能、提高其温度适应性、增强电解质与电极材料相容特性等方面研究开发的系列基于双草酸硼酸锂[LiBOB]及二氟草酸硼酸锂[LiODFB]等有机硼酸锂盐和亚硫酸酯类等添加剂的新型功能电解质材料,其表现出高的热稳定性和良好的电化学性能。而且,其中的有机硼酸锂盐和亚硫酸酯还可以作为SEI成膜材料进行应用,其在石墨电极表面可形成稳定的SEI膜,有利于改善电池的循环寿命、自放电、库仑效率和不可逆容量衰减。最后,本文探讨了当前存在的问题及未来的研究方向,并对其应用前景进行了展望。

英文摘要：

With the rapid development of lithium ion batteries with higher energy density, higher power density and high security, the research of new functional electrolytes has attracted considerable attention in novel materials field for lithium ion batteries. In this paper, the recent research advances of key technologies on the application of lithium salts and additive functional electrolytes in lithium ion batteries are reviewed, especially on the results of our research team focusing on new functional electrolytes based on lithium organic borate salt, such as lithium bis（oxalato） borate [ LiBOB ] and lithium oxalyldifluoroborate [ LiODFB ~, and sulfite additives for the purpose of improving security, temperature adaptability and the compatibility between electrolytes and electrodes of lithium ion batteries. These electrolytes exhibit high thermal stability and good electrochemical properties. Moreover, lithium organic borate salt and sulfite have been investigated as new solid electrolyte interphase （SEI） film-forming materials. The formation of a stable passivating film on the graphite surface is believed to be the reason for the improved cell performance, including cycle life, self-discharge, coulombic efficiency and irreversible capacity. Furthermore, current problems as well as the corresponding research directions are discussed, and the possible application prospects are also proposed.

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