低成本铝离子电池电解液的设计及应用  

Design and application of electrolytes for low-cost aluminum-ion batteries

作　　者：侯剑 彭成信 HOU Jian;PENG Chengxin(School of Materials and Chemistry,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学材料与化学学院,上海200093

出　　处：《化学研究》2023年第3期253-258,共6页Chemical Research

基　　金：国家自然基金资助项目(22179085,21875141)。

摘　　要：可充电铝离子电池由于高体积/质量比容量、高安全性、环保等优点被认为是非常具有前景的下一代储能电池。然而广泛使用的AlCl_(3)/EMImCl离子液体电解液由于具有一定毒性和高昂的价格制约着铝离子电池的进一步应用。基于此,通过效率和稳定性测试筛选四种不同的低成本尿素基配体,选择了性能最好的AlC_(l3)/1,3-二甲基脲作为铝离子电池的电解液。最后以人造石墨作为正极组装了全电池。该电池在50 mA·g^(-1)的电流密度下实现了91.1 mAh·g^(-1)的高比容量,并能够稳定循环超过100圈,容量保持率高达95.8%。Rechargeable aluminum ion batteries are considered as very promising next-generation energy storage batteries due to high volume/mass ratio capacity,high safety,and environmental protection,etc.Then the widely used AlCl_(3)/EMImCl ionic liquid electrolyte restricts the further application of aluminum ion batteries due to certain toxicity and high price.Based on this,four different low-cost urea-based ligands were screened by efficiency and stability tests,and the best-performing AlCl_(3)/1,3-dimethylurea was selected as the electrolyte for the aluminum ion battery.Finally,the full cell was assembled with syntactic graphite as the positive electrode.The cell achieved a high specific capacity of 91.1 mAh·g^(-1)at a current density of 50 mA·g^(-1)and was able to cycle stably for more than 100 cycles with a capacity retention rate of 95.8%.

关 键 词：铝离子电池 低成本 电解液 人造石墨 

分 类 号：O646[理学—物理化学]