期刊
ACS NANO
卷 10, 期 2, 页码 2295-2304出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.5b06995
关键词
silicon; mesoporous; general strategy; lithium ion batteries; high stabilization
类别
资金
- 973 Project of China [2011CB935901]
- National Natural Science Fund of China [91022033, 21201158]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [21521001]
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 manometers 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 (similar to 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.
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