A Deep Reduction and Partial Oxidation Strategy for Fabrication of Mesoporous Si Anode for Lithium Ion Batteries

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• 作者：Jianwen Liang ; Xiaona Li ; Zhiguo Hou ; Wanqun Zhang ; Yongchun Zhu ; Yitai Qian
• 刊名：ACS Nano
• 出版年：2016
• 出版时间：February 23, 2016
• 年：2016
• 卷：10
• 期：2
• 页码：2295-2304
• 全文大小：584K
• ISSN：1936-086X

文摘

A deep reduction and partial oxidation strategy to convert low-cost SiO₂ into mesoporous Si anode with the yield higher than 90% is provided. This strategy has advantage in efficient mesoporous silicon production and in situ formation of several nanometers SiO₂ layer on the surface of silicon particles. Thus, the resulted silicon anode provides extremely high reversible capacity of 1772 mAh g^–1, superior cycling stability with more than 873 mAh g^–1 at 1.8 A g^–1 after 1400 cycles (corresponding to the capacity decay rate of 0.035% per cycle), and good rate capability (∼710 mAh g^–1 at 18A g^–1). These promising results suggest that such strategy for mesoporous Si anode can be potentially commercialized for high energy Li-ion batteries.