锂离子电池高能量密度负极配方

The formula of anode with high energy density for Li-ion battery

对比了粘结剂羧甲基纤维素钠（CMC）／丁苯橡胶（SBR）（质量比3：5）含量为4．0％、活性物质含量为94．5％及粘结剂丙烯腈多元共聚物LA133含量分别为2．0％和2．5％、活性物质含量为96．5％的负极组装的锂离子电池的充放电特性，对电芯膨胀情况、循环性能和安全性能等进行了分析。当LA133含量为2．5％时，负极组装的电池综合性能最好，在3．0～4．2v充放电，1．00C放电的能量密度达455Wh／L，比CMC／SBR含量为4．0％的负极组装的电池提高了10．44％；1．00C循环300次的容量保持率达91％以上。环境和安全测试结果表明：电池的环境适应性强，可靠性高。

Charge-dlscharge characteristics of the Li-ion battery with the anode of 94.5 % mass content of active material and 4% mass content of C MC/SBR（mass ratio 3：5）, or 96.5 % mass content of active material and 2.0% or 2.5 % mass content of acry- lonitrile multi-copolymer LA133 were compared. The cell expansion, cycle performance and safety performance were investigated. The cell with the anode of 2.5% LA133 had the best comprehensive performance, exhibited a energy density of 455 Wh/L at the current of 1.00 C （3.0 - 4.2 V）, 10.44% higher than the cell with the anode of 4.0% mass content of CMC/SBR. The capacity retention was more than 91% after 300 cycles at the current of 1.00 C （3.0 - 4.2 V） .Environment and safety test showed that the battery had high environment adaptability and reliability.