Chen Yifan, Lin Yangfan, Du Ning, Zhang Yaguang, Zhang Hui, Yang Deren
State Key Laboratory of Silicon Materials, School of Materials Science & Engineering, Cyrus Tang Center for Sensor Materials and Applications Zhejiang University, Hangzhou, Zhejiang 310027, People's Republic of China.
Chem Commun (Camb). 2017 Jun 1;53(45):6101-6104. doi: 10.1039/c7cc02732j.
A novel Si/SiO porous structure with a SiO coating layer of varying thicknesses was prepared via a simple annealing and acid washing process. When used as an anode material for lithium-ion batteries, the Si/SiO porous structure with an ∼9 nm SiO coating layer demonstrates significantly improved electrochemical performance with a high reversible discharge capacity of over 915 mA h g after 500 long cycles at 1 A g. The lithiation mechanism of a SiO layer of different thicknesses has also been investigated.
通过简单的退火和酸洗工艺制备了一种具有不同厚度SiO涂层的新型Si/SiO多孔结构。当用作锂离子电池的负极材料时，具有约9nm SiO涂层的Si/SiO多孔结构在1A g下经过500次长循环后表现出显著改善的电化学性能，可逆放电容量高达915 mA h g以上。还研究了不同厚度SiO层的锂化机理。
