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updayday

木虫 (正式写手)


[资源] JACS最新20130206-锂电正极包覆锂离子快充涂层

Nano-scale coating of LiMO2 (M = Ni, Co, Mn) nanobelts with
Li+-conductive Li2TiO3-Towards better rate capabilities for Li-ion
battery
By using a novel coating approach based on the reaction between MC2O4·xH2O and Ti(OC4H9)4, a series of nanoscale Li2TiO3-coated LiMO2 nanobelts with varied Ni, Co, and Mn contents was prepared for the first time. The complete, thin Li2TiO3 coating layer strongly adheres to the host material and has a 3D diffusion path for Li+ ions. It is doped with Ni2+ and Co3+ ions in addition to Ti4+ in LiMO2, both of which were found to favor Li+-ion transfer at the interface. As a result, the coated nanobelts show improved rate, cycling, and thermal capabilities when used as the cathode for Li-ion battery.
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