School of Chemistry and Chemical Engineering, Hefei University of Technology, Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei 230009, China.
Chem Commun (Camb). 2018 Nov 1;54(88):12447-12450. doi: 10.1039/c8cc05034a.
Silicon nanocomposites with surface coating have been promising candidates for high-performance anodes in Li-ion batteries. Here we report a simple yet effective way to synthesize Si@SiO2 nanocomposites with amorphous SiO2 coating through a fluoride ion-mediated continuous etching-redeposition process. The Si@SiO2 nanocomposite anode exhibits significantly improved lithium storage properties, with a reversible capacity of 1356 mA h g-1 at 2.1 A g-1 for 300 cycles.
具有表面涂层的硅纳米复合材料是高性能锂离子电池阳极的有前途的候选材料。在这里，我们报告了一种通过氟离子介导的连续刻蚀-再沉积过程合成具有非晶态 SiO2 涂层的 Si@SiO2 纳米复合材料的简单而有效的方法。Si@SiO2 纳米复合材料阳极表现出显著改善的锂存储性能，在 2.1 A g-1 的电流密度下循环 300 次后可逆容量为 1356 mA h g-1。
