3-异氰酸丙烯对高镍LiNi_(0.8)Co_(0.1)Mn_(0.1)O_2/石墨全电池高温性能的改善  

Improvement of High Temperature Performance of LiNi_(0.8)Co_(0.1)Mn_(0.1)O_2/Graphite Cells by Introducing Allyl Isocyanate

作　　者：罗智阳 张宏[1] 余乐 黄东海 沈佳琪 LUO Zhi-yang;ZHANG Hong;YU Le;HUANG Dong-hai;SHEN Jia-qi(Shaanxi University of Science &Technology,Shaanxi Xi'an 710016,China;Guangzhou Tinci Materials Technology Co.,Ltd.,Guangdong Guangzhou 510700,China)

机构地区：[1]陕西科技大学,陕西西安710016 [2]广州天赐高新材料股份有限公司,广东广州510700

出　　处：《当代化工》2018年第12期2538-2541,共4页Contemporary Chemical Industry

基　　金：2017年广州市产学研协同创新重大项目(201704030011);2017年广州市科技计划项目(201704030020)

摘　　要：为了探究3-异氰酸丙烯(AI)作为电解液添加剂对高镍层状LiNi_(0.8)Co_(0.1)Mn_(0.1)O_2(NCM811)/石墨全电池高温性能的影响,在EC:EMC:DEC=3:5:2/15%(wt) LiPF_6电解液中加入不同浓度添加剂,对不同组全电池进行了循环伏安曲线及一系列高温下测试,探究了其电化学性能;通过扫描电子显微镜(SEM)对NCM811正极表面进行了形貌表征。结果表明,适量AI的加入可以增强全电池在高温下的充放电及存储性能,且对高镍正极表面起到保护作用。To explore the effect of allyl isocyanate(AI) as electrolyte additive on high temperature performance of high-nickel layer structure LiNi0.8Co0.1Mn0.1O2 (NCM811)/graphite pouch cells, the EC:EMC:DEC=3:5:2/15%(wt) LiPF6 electrolytes with different concentration of AI were prepared, and cyclic voltammetry curves and a series of tests at high temperature were carried out on different groups to investigate their electrochemical performance. The surface morphology of NCM811 cathode was characterized by scanning electron microscopy (SEM).The results showed that the introduction of appropriate amount of AI enhanced the charge-discharge and storage performance of the pouch cells at high temperature, and protected the particle surface of NCM811.

关 键 词：3-异氰酸丙烯 电解液 LiNi0.8Co0.1Mn0.1O2 锂离子电池 

分 类 号：TQ035[化学工程]