The Electrochemical Synthesis of LiNbO2 in Molten Salts and its Application for Lithium Ion Batteries with High Rate Capability
The Electrochemical Synthesis of LiNbO2 in Molten Salts and its Application for Lithium Ion Batteries with High Rate Capability
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DOI：
10.1016/j.electacta.2015.12.085
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发表时间：
2016-01
影响因子：
6.6
通讯作者：
Wei Li-;Chen-yan Hu;Min Zhou;Kangli Wang;Haomiao Li;Shijie Cheng;Kai Jiang
中科院分区：
文献类型：
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作者：
Wei Li-;Chen-yan Hu;Min Zhou;Kangli Wang;Haomiao Li;Shijie Cheng;Kai Jiang
本文报道了一种高效、快速、可控的层状结构LiNbO2的电化学合成方法。首次研究了LiNbO2作为锂离子电池负极材料的电化学性能。这种材料在0.25 C（1C = 200 mA g−1）下显示出10190 mAh g− 1的高可逆容量、上级倍率性能（80 C下52 mA h g− 1）和优异的长期循环稳定性（50 C下1000次循环后75 mAh g− 1），这是由于受益于LiNbO2层状晶体结构中的高电子电导率和快速锂扩散的有利动力学。这表明LiNbO2是一种很有前途的正极材料。此外，这项工作可能提供一种简便和可控的方法来合成用于锂离子电池和其他电化学储能应用的电极材料。
Herein, we report an effective, fast and controllable electrochemical synthesis of layered structure LiNbO2by electrolysis of solid Nb2O5in molten LiF-LiCl salt. For the first time, the electrochemical performance of LiNbO2as an anode for lithium ion battery is investigated. Such a material shows a high reversible capacity of ∼190 mAh g−1at 0.25C (1C = 200 mA g−1), superior rate capability (52 mA h g−1at 80C) and excellent long-term cycle stability (75 mAh g−1after 1000 cycles at 50C), due to the favorable kinetics benefiting from the high electronic conductivity and fast lithium diffusion in layered crystal structure of LiNbO2. It indicates that LiNbO2is a promising anode candidate. Moreover, this work may provide a facile and controllable way to synthesize electrode materials for lithium ion batteries and other electrochemical energy storage applications.