镁硫二次电池电解液

发布时间：2018-01-06 05:08

本文关键词：镁硫二次电池电解液　出处：《化学进展》2017年05期 　论文类型：期刊论文

【摘要】：镁硫二次电池具有安全性好、成本低、能量密度高等特点,其中电解液是目前制约其发展的关键因素。由于硫电极的亲电子特性,格氏试剂及其衍生物系列的传统镁离子电解液无法适用。本文针对有机镁盐+AlCl_3、MgCl_2+有机铝卤盐、MgCl_2+AlCl_3、Mg(TFSI)_2(双三氟甲烷磺酰亚胺基镁)四类电解质溶液体系进行总结和评述。有机镁盐+AlCl_3电解液的镁硫电池表现出较好的电化学性能,MgCl_2+有机铝卤盐电解液体系与硫电极具有良好的兼容性。而使用Mg(TFSI)_2和MgCl_2+AlCl_3电解液时硫电极的比容量不高,且放电平台低。目前所报道的镁硫电池体系的可逆容量衰减都较大,通过加入电解液添加剂等方法可以改善其放电特性和循环稳定性。本文还总结了电解液中活性阳离子结构、阴离子以及电解液添加剂的作用,并展望了镁硫电池电解液体系的研究趋势。
[Abstract]:Magnesium sulfur secondary battery has the characteristics of good safety, low cost and high energy density, among which electrolyte is the key factor restricting its development. The traditional magnesium ion electrolyte of Grignard reagent and its derivative series can not be used. This paper deals with the organic magnesium salt AlCl3 / MgCl2 / MgCl2 / MgCl2 AlCl_3. MgTX TFSI2 (bis (trifluoromethane) sulfonyl magnesium). Four kinds of electrolyte solutions were summarized and reviewed. The magnesium-sulfur batteries with organic magnesium salt AlCl_3 electrolyte showed good electrochemical performance. MgCl_2 organic aluminum halogen salt electrolyte system has good compatibility with sulfur electrode. The specific capacity of sulfur electrode is not high in the electrolyte of MgCl_2 AlCl_3 and S _ 2. And the discharge platform is low. The reversible capacity attenuation of the reported magnesium-sulfur battery system is large. The discharge characteristics and cycle stability can be improved by adding electrolyte additives. The structure of active cations, anions and the role of electrolyte additives in the electrolyte are also summarized in this paper. The research trend of magnesium-sulfur battery electrolyte system is also prospected.
【作者单位】：哈尔滨工业大学化工与化学学院;
【基金】：国家自然科学基金项目(No.2143303)资助~~
【分类号】：TM912
【正文快照】： **Corresponding author e-mail:zuopj@hit.edu.cn(Pengjian Zuo);yingeping@hit.edu.cn(Geping Yin)Electrolyte which can be divided into four categories is thekey factor restricting the development of magnesium-sulfurbatteriesContents1 Introduction2 Electrolyt

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