A Cobalt-Free Li(Li Ni Fe Mn )O Cathode for Lithium-Ion Batteries with Anionic Redox Reactions.

Lithium-rich, Mn-based layered oxides Li MnO -LiMO (M=Ni, Co) have been considered as promising cathode candidates owing to their high capacity. However, the resources shortage and high price of cobalt make it imperious to substitute cobalt with other high-abundance elements. Here, we synthesized a low-cost, cobalt-free, Fe-substituted oxide material, Li(Li Ni Fe Mn )O .

Hierarchical Mesoporous Iron Fluoride with Superior Rate Performance for Lithium-Ion Batteries.

Monodispersed mesoporous iron fluorides were synthesized by a low-cost reversed micelle method. The as-prepared materials with hierarchical mesoporous structure exhibit excellent rate capability (115.6 mAh g at 2000 mA g) which is superior to many other carbon-free iron fluorides.