Journal of Power Sources, Vol.410, 132-136, 2019
Vermiculite derived porous silicon nanosheet as a scalable and low cost anode material for lithium-ion batteries
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 re-versible 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.