CeO2 Surface Modification to Improve Cycle and Storage Performance on Lithium Ion Battery Cathode Material LiNi0.80Co0.15Al0.05O2

作者：Xia Shu-Biao; Zhang Ying-Jie; Dong Peng; Yang Rui-Ming; Zhang Yan-Nan

来源：Chinese Journal of Inorganic Chemistry, 2014, 30(3): 529-535.

• LiNi0.8Co0.15Al0.05O2 cathode
• CeO2-coating
• cycle performance
• electrolyte

LiNi0.8Co0.15Al0.05O2 cathode material was successfully fabricated by co-precipitation. CeO2 coating use by sol-gel and subsequent heat treatment at 600 degrees C for 4 h, the CeO2 surface modification can improve cycle and storage performance. When CeO2 coating is 0.02% (molar ratio), contrast to pristine NCA, the CeO2-coated LiNi0.8Co0.15Al0.05O2 cathode exhibits no decrease in its initial specific capacity of 182.44 mAh center dot g(-1) at 0.2C and excellent capacity retention (85.96% of its initial capacity) between 4.3 and 2.75 V at 0.5C after 100th cycles. The results indicate that the surface treatment should be an effective way to improve cycle properties due to CeO2 inhibit the electrodes and the electrolyte side effects. CeO2 coating layer with highly oxidability can react with the electrolyte in advance to consume trace amounts of water and HF in the electrolyte, and protect the internal active material.

• 单位
  昆明理工大学