电解液添加纳米氧化铝对锂离子电池性能影响  

Influence of Adding Nano-alumina in Electrolyte on Performance of Lithium-ion Batteries

作　　者：刘林 张树苗 高虹[1] LIU Lin;ZHANG Shumiao;GAO Hong(Shenyang Ligong Uinversity,Shenyang 110159,China)

机构地区：[1]沈阳理工大学环境与化学工程学院,沈阳110159

出　　处：《沈阳理工大学学报》2021年第1期29-33,共5页Journal of Shenyang Ligong University

基　　金：辽宁省大学生创新创业训练计划(201810144055)。

摘　　要：将纳米氧化铝粉体加入到锂离子电池电解液中,通过充放电测试、充放电循环测试以及交流阻抗分析,研究纳米氧化铝的添加量对锂离子电池电化学性能的影响。结果表明,在电解液中添加一定量的纳米氧化铝粉体可以有效提高电解液的电导率,减小电荷传递电阻,提高锂离子电池的电化学性能。当纳米氧化铝添加量为1.0%(质量分数)时,锂离子电池充放电过程中的极化最小,放电比容量最高,在0.1C倍率下,达到155.4mAh·g^(-1),充放电循环50次,放电比容量仍高达147.5mAh·g^(-1),容量保持率为94.9%。The electrochemical performance of lithium-ion batteries can be effectively improved by adding a small amount of additives into the electrolyte. In this study, nano Al_(2)O_(3) powder was used as the additive of lithium-ion battery electrolyte, the influence of the amount of nano Al_(2)O_(3) on the electrochemical properties of lithium-ion batteries were studied by galvanostatic testing and electrochemical impedance spectroscopy. The experimental results showed that the addition of nano Al_(2)O_(3) in the electrolyte could improve the conductivity of the electrolyte, reduce the charge transfer resistance, and improve the electrochemical performance of lithium-ion batteries. When the addition amount of nano Al_(2)O_(3) was 1.0%,the lithium-ion battery had the minimum polarization in the charging and discharging process, and the discharge specific capacity reached the peak 155.4 mAh·g^(-1). Moreover, its discharge capacity was 147.5 mAh·g^(-1) over 50 cycles with a capacity retention rate of 94.9% at a rate of 0.1 C.

关 键 词：锂离子电池 纳米氧化铝粉体 添加剂 电化学性能 

分 类 号：TM912.9[电气工程—电力电子与电力传动]