文章基本信息

标题：Hollow Porous SiO2 Nanocubes Towards High-performance Anodes for Lithium-ion Batteries
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作者：Nan Yan ; Fang Wang ; Hao Zhong 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2013
卷号：3
期号：1
DOI：10.1038/srep01568
语种：English
出版社：Springer Nature
摘要：The high theoretical capacity and low discharge potential of silicon have attracted much attention on Si-based anodes. Herein, hollow porous SiO₂ nanocubes have been prepared via a two-step hard-template process and evaluated as electrode materials for lithium-ion batteries. The hollow porous SiO₂ nanocubes exhibited a reversible capacity of 919 mAhg⁻¹ over 30 cycles. The reasonable property could be attributed to the unique hollow nanostructure with large volume interior and numerous crevices in the shell, which could accommodate the volume change and alleviate the structural strain during Li ions' insertion and extraction, as well as allow rapid access of Li ions during charge/discharge cycling. It is found that the formation of irreversible or reversible lithium silicates in the anodes determines the capacity of a deep-cycle battery, fast transportation of Li ions in hollow porous SiO₂ nanocubes is beneficial to the formation of Li₂O and Si, contributing to the high reversible capacity.