中国有色冶金

Surfactants play an important role in morphology control during materials synthesis. In order to improve the comprehensive electrochemical performance of the high nickel ternary cathode material LiNi_0.8Co_0.1Mn_0.1O₂ the surfactants were used to control the morphology of the ternary material. Different surfactants were added in the synthesis process of the cathode material precursor LiNi_0.8Co_0.1Mn_0.1 (OH)₂ to control the morphology of ternary materials, and then morphology and electrochemical performance of LiNi_0.8Co_0.1Mn_0.1O₂ the high nickel ternary product material obtained from calcining, were analyzed. The results show that the product materials synthesized by surfactants have more regular morphology and crystal structural stability. The electrochemical test shows that the specific capacity of the first charge can reach 2322, 2481, 2313 and 2161mAh·g ^-1 after adding sodium dodecyl benzene sulfonate, sucrose, cetyltrimethylammonium bromide and polyethylene glycol. Among them, the first discharge specific capacity of cetyltrimethylammonium bromide reaches 1939mAh·g ^-1, and the cyclic performance is good, which indicates that the auxiliary synthesis of surfactants is beneficial to the morphology control and electrochemical performance improvement of materials.