Nanoscale Coating of LiMO2 (M = Ni, Co, Mn) Nanobelts with Li+-Conductive Li2TiO3: Toward Better Rate Capabilities for Li-Ion Batteries

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• 作者：Jun Lu ; Qing Peng ; Weiyang Wang ; Caiyun Nan ; Lihong Li ; Yadong Li
• 刊名：The Journal of the American Chemical Society
• 出版年：2013
• 出版时间：February 6, 2013
• 年：2013
• 卷：135
• 期：5
• 页码：1649-1652
• 全文大小：291K
• 年卷期：v.135,no.5(February 6, 2013)
• ISSN：1520-5126

文摘

By using a novel coating approach based on the reaction between MC₂O₄路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.