%0 Journal Article
%A Fanglin Wu
%A Yizhi Yan
%A Rui Wang
%A Haopeng Cai
%A Wei Tong
%A Haolin Tang
%B Ceramics International
%D 2017
%G eng
%N 10
%P 7668 - 7673
%R 10.1016/j.ceramint.2017.03.066
%T Synthesis of LiNi1/3Mn1/3Co1/3O2@graphene for lithium-ion batteries via self-assembled polyelectrolyte layers
%V 43
%8 03/2017
%! Ceramics International
%X <p><span>LiNi</span><span>1/3</span><span>Co</span><span>1/3</span><span>Mn</span><span>1/3</span><span>O</span><span>2</span><span>&nbsp;cathode coated with a thin layer of graphene (~8nm) 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°C, exhibiting a capacity retention of ~90% vs. 78% for pristine NMC @ cycle 100 and 1C 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.</span></p>