摘要
使用Hummers法得到氧化石墨烯,再通过还原氧化石墨烯制备石墨烯。使用高温固相法制备LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)正极材料,将石墨烯加入乙醇溶液中,与增稠分散剂羧甲基纤维素钠(CMC)混合得到石墨烯溶液。利用液相自聚集法将石墨烯溶液微量包覆在LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)表面。通过SEM、XRD以及电化学测试系统对石墨烯/LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)复合材料进行表征和测试。结果表明,0.8%-石墨烯/LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)复合材料性能最佳,首次充电比容量最大值达到222.85 mAh/g,首次充放电比容量最大值达到208.93 mAh/g,库仑效率为93.75%。
Graphene oxide(GO)was obtained by Hummers method and then prepared by reducing GO.LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)cathode material was prepared by high temperature solid phase method.Graphene was added to ethanol solution and then mixed with the thickening dispersant sodium carboxymethyl cellulose(CMC)to obtain graphene solution.The surface of LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)was coated with graphene solution by liquid phase self-aggregation method.Graphene/LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)composites were characterized and tested by SEM,XRD and electrochemical testing systems.The results show that 0.8%-graphene/LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)composites have the best performance.
作者
刘雷斌
张淑娴
刘炫漓
李玲
邓凌峰
LIU Leibin;ZHANG Shuxian;LIU Xuanli;LI Ling;DENG Lingfeng(School of Materials Science and Engineering,Central South University of Forestry and Technology,Changsha,Hunan Province,410004,China;Hunan Province Key Laboratory of Materials Surface and Interface Science and Technology,Central South University of Forestry and Technology,Changsha,Hunan Province,410004,China)
出处
《电池工业》
CAS
2024年第2期72-77,共6页
Chinese Battery Industry
基金
国家自然科学基金重点资助项目(3153009)
