摘要
采用共沉淀法制备LiNi1/3Co1/3Mn1/3O2正极材料,并用聚苯胺(PANI)对材料进行表面包覆。通过XRD、SEM和透射电子显微镜(TEM),对材料的结构和形貌进行分析;采用恒流充放电、循环伏安和交流阻抗测试,研究包覆量对材料电化学性能的影响。当PANI包覆量为10%时,LiNi1/3Co1/3Mn1/3O2正极材料的电化学性能最好,以1 C在2.5~4.6 V循环,放电比容量为185.0 m Ah/g,比未包覆PANI的材料提高13.8%。
Cathode material LiNi1/3Co1/3Mn1/3O2 was prepared by co-precipitation method,the surface of the material was coated with polyaniline(PANI).The structure and morphology of the materials were analyzed by XRD,SEM and transmission electron microscope(TEM).The effects of coating amounts on the electrochemical performance of cathode were studied by galvanostatic charge discharge test,cyclic voltammetry and AC impedance tests.When the amount of PANI coating was 10%,the electrochemical performance of LiNi1/3Co1/3Mn1/3O2 was the best.Its specific discharge capacity at 1 C in 2.5-4.6 V was 185.0 mAh/g,increased by 13.8%compared to the material without PANI coating.
作者
万柳
郭隆泉
任丽
WAN Liu;GUO Long-quan;REN Li(School of Chemical Engineering and Technology,Hebei University of Technology,Tianjin 300130,China)
出处
《电池》
CAS
CSCD
北大核心
2019年第5期383-386,共4页
Battery Bimonthly
基金
国家自然科学基金(51203041)
