3 years ago

Vermiculite derived porous silicon nanosheet as a scalable and low cost anode material for lithium-ion batteries

Xin-yang Yue, Aierxiding Abulikemu, Xun-lu Li, Qi-qi Qiu, Fang Wang, Xiao-jing Wu, Yong-ning Zhou

Publication date: 15–31 January 2019

Source: Journal of Power Sources, Volumes 410–411

Author(s): Xin-Yang Yue, Aierxiding Abulikemu, Xun-Lu Li, Qi-Qi Qiu, Fang Wang, Xiao-Jing Wu, Yong-Ning Zhou

Abstract

Silicon is considered to be a promising candidate as the anode material for next-generation lithium-ion batteries. However, Si-based material is still facing great challenge to be commercialized due to the unsatisfied cycle life and rate capability. Here, we demonstrate a facile and low-cost method to prepare two-dimension (2D) silicon nanosheets from natural vermiculite, which is an earth-abundant non-metallic mineral with stratified structure. The obtained porous 2D silicon material (Ver-Si) exhibits promising electrochemical performance with a reversible capacity of 900 mAh g−1 and high capacity retention. The promising electrochemical performance is originated from the unique 2D mesoporous structure, which can facilitate charge (Li-ion and electron) transportation and electrolyte penetration, as well as accommodate the volume changes during cycling.

Graphical abstract

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