负极材料对锂离子蓄电池性能影响试验分析  

Experimental analysis of influence of anode material on performance of lithium ion battery

作　　者：张晓光[1] ZHANG Xiaoguang(Hydropower Plant,Tianshengqiao Cascade I Hydropower Development Co.,Ltd.,Xingyi 562400,Guizhou,China)

机构地区：[1]天生桥一级水电开发有限责任公司水力发电厂,贵州兴义562400

出　　处：《金属功能材料》2023年第3期55-61,共7页Metallic Functional Materials

基　　金：国家自然科学基金(12873130)。

摘　　要：为优化锂离子蓄电池性能,分析蓄电池内负极材料对电池性能的影响,设计负极材料对锂离子蓄电池性能影响的试验。负极材料以石墨为例,制备锂离子蓄电池,并通过试验分析负极材料的预处理、粒径、用量对于锂离子蓄电池性能的影响。对一部分石墨负极材料烘烤,验证负极材料烘烤处理对锂离子蓄电池性能影响;设置8、10、15、20、2和30μm 6种粒径的石墨,试验分析负极材料不同粒径对锂离子蓄电池性能的影响;选择70%、80%、90%3种石墨负极材料用量,试验分析负极材料何种用量能够提升电池性能。试验结果显示:石墨负极材料的烘烤预处理,并不会影响锂离子蓄电池的容量保持率与电压降等性能,所以无需烘烤预处理石墨负极;石墨负极注浆为20~25μm粒径时,锂离子蓄电池放电容量最稳定,性能最佳;石墨负极用量为90%时,锂离子蓄电池恒流充放电性能、倍率性能、循环性能均最佳,锂离子蓄电池内阻最低,具有最优锂离子蓄电池性能。To optimize the performance of lithium-ion batteries,graphite was selected as the anode material to prepare lithium-ion batteries,and the effects of different graphite particle size and the amount of graphite on the performance of lithium-ion batteries were analyzed by experiments.A part of graphite anode material was baked to verify the effect of pretreatment on the performance of lithium-ion battery;Six particle sizes of graphite(8,10,15,20,25 and 30μm)were set up to analyze the effect of particle sizes on the performance of lithium-ion battery.Three kinds of graphite cathode material dosage were selected,including 70%,80%and 90%,to test and analyze which amount of graphite can improve the performance of the battery.Experimental analysis shows that the bake of graphite anode materials will not affect the capacity retention rate and voltage drop performance of lithium-ion battery,so there is no need to pre-treat the graphite.When the particle size of graphite grouting is 20-25μm,the discharge capacity of lithium-ion battery is the most stable.When the amount of graphite is 90%,the constant current charge-discharge capacity,rate performance and cycle performance of lithium-ion battery are the best,meanwhile,lithium-ion battery assembled with 90%graphite shows the lowest internal resistance and most optimal electrochemical performance.

关 键 词：负极材料 锂离子 蓄电池 性能影响 恒流充放电 倍率性能 

分 类 号：TM912[电气工程—电力电子与电力传动]