• 文献标题:   Synthesis of LiNi1/3Mn1/3CO1/3O2@graphene for lithium-ion batteries via self-assembled polyelectrolyte layers
  • 文献类型:   Article
  • 作  者:   WU FL, YAN YZ, WANG R, CAI HP, TONG W, TANG HL
  • 作者关键词:   lini1/3co1/3mn1/3o2 cathode, graphene, lithiumion battery, selfassembly, polyelectrolyte
  • 出版物名称:   CERAMICS INTERNATIONAL
  • ISSN:   0272-8842 EI 1873-3956
  • 通讯作者地址:   Wuhan Univ Technol
  • 被引频次:   5
  • DOI:   10.1016/j.ceramint.2017.03.066
  • 出版年:   2017

▎ 摘  要

LiNi1/3Co1/3Mn1/3O2 cathode coated with a thin layer of graphene (similar to 8 nm) is successfully synthesized by self-assembly and pyrolysis of polyelectrolyte layers on the surface of NMC particles. The graphene coated NMCs still possess a layered structure with good crystallinity and demonstrate a superior electrochemical performance (e.g., rate capability and cycling stability). The best graphene coated NMC cathode is prepared at a calcination temperature of 800 degrees C, exhibiting a capacity retention of similar to 90% vs. 78% for pristine NMC @ cycle 100 and 1 C rate. The improvement in cycling performance is further enlarged after 500 cycles (74% vs. 51%). This can be attributed to the dual functions of graphene coating in enhancing electronic conductivity and protecting NMC surface from the contact with electrolyte during the electrochemical reaction.