High capacity Li[Li0.2Mn0.54Ni0.13Co0.13]O-2-V2O5 composite cathodes with low irreversible capacity loss for lithium ion batteries

作者：Gao J; Kim J; Manthiram A^*

来源：Electrochemistry Communications, 2009, 11(1): 84-86.

DOI：10.1016/j.elecom.2008.10.036

• Lithium ion battery
• Cathode material
• Layered oxides
• Composite cathodes

With an aim to suppress the huge irreversible capacity loss encountered in high capacity layered oxide solid solutions between Li2MnO3 and LiMO2 (M = Mn, Ni, and Co), layered Li[Li0.2Mn0.54Ni0.13Co0.13]O-2-V2O5 composite cathodes with various V2O5 contents have been investigated. The irreversible capacity loss decreases from 68 mAh/g at 100% Li[Li0.2Mn0.54Ni0.13Co0.13]O-2 to 0 mAh/g around 89 wt.% Li[Li0.2Mn0.54Ni0.13Co0.13]O-2-11 wt.% V2O5 as the lithium-free V2O5 serves as an insertion host to accommodate the lithium ions that could not be inserted back into the layered lattice after the first charge. The Li[Li0.2Mn0.54Ni0.13Co0.13]O-2-V2O5 Composite cathodes with about 10-12 wt.% V2O5 exhibit an attractive discharge capacity of close to 300 mAh/g with little irreversible capacity loss and good cyclability.

• 出版日期2009-1