摘要
对比纯镁电解液的镁电池,锂镁双盐混合电池具有循环寿命长、充放电速度快、Coulomb效率高、正极选择多等特点,特别当采用容量更高的转换反应型正极时,可显著提高镁电池的能量密度。从硫基和有机正极材料方面综述了转换反应型或多电子转移型双盐电池的研究进展,通过纳米结构调控、导电网络构筑、支撑离子诱导等手段,实现了镁硫电池和镁玫瑰酸盐电池的能量密度提升和长期循环稳定,它们的正极能量密度可达500 W·h/kg。提出了添加剂盐激活转换型镁金属电池的策略,为未来镁基电池的发展提供了新的思路。
Compared to magnesium metal batteries(MMBs)based on pure Mg2+electrolyte,the MMBs based on hybrid electrolyte containing Mg2+and Li+possess some advantages such as long cycle life,fast charge and discharge processes,high Coulomb efficiency and more choices of cathode materials.The energy density of MMBs can be improved especially when conversion-based cathode materials are used.Recent development on dual-salt magnesium batteries based on conversion reaction or multiple electron transfer process was reviewed based on the aspects of sulfide and organic cathode materials.With the assistance of nano-structure regulation,conductive network construction,and ion pillaring,Mg–S and Mg-rhodizonate batteries are able to achieve a high energy density(i.e.,500 W·h/kg based on active cathode material)and a long-term cycle stability.This review proposed an additive salt strategy to accelerate the kinetics of MMBs based on conversion reaction,and provided some fresh insights for the future development of magnesium-based batteries.
作者
刘文龙
黄可贤
周学俊
李驰麟
LIU Wenlong;HUANG Kexian;ZHOU Xuejun;LI Chilin(State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 201899,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2020年第7期978-989,共12页
Journal of The Chinese Ceramic Society
基金
国家重点研发计划(2016YFB0901600)
国家自然科学基金(U1830113,51772313,21975276,51802334)
上海科委项目(16DZ2270100)。
关键词
镁电池
锂镁双盐电解液
动力学激活
正极材料
转换反应
magnesium battery
lithium-magnesium dual-salt electrolyte
kinetic activation
cathode material
conversion reaction
