Effect of polyacrylic acid on the structure and properties of LiNi_(1/3)Co_(1/3)Mn_(1/3)O_2 cathode material for lithium ion battery

Nanocrystalline LiNi1/3Co1/3Mn1/3O2 cathode materials were synthesized by sol-gel method using polyacrylic acid(PAA) as a chelating agent.The effects of the molar ratio of PAA to total metal ions and calcination temperature on the structure and electrochemical performance of the LiNi 1 /3 Co 1 /3 Mn 1 /3 O 2 electrode materials were investigated.The results showed that the well-distributed LiNi1/3Co1/3Mn1/3O2 with lamellar structure was obtained at a calcination temperature of 700℃.The crystal developed completely and the grain size of the LiNi 1/3 Co 1 /3Mn1/3O2 particle was about 80nm.The initial discharge capacity of 169.2mAh / g was obtained while the molar ratio of PAA to total metal ions 0.75,and the discharge capacity retention ratio was 89.3% after 30 cycles.