文献类型：期刊文献

英文题名：Scalable synthesis of micrometer-sized porous silicon/carbon composites for high-stability lithium-ion battery anodes

作者：Su, Haiping[1]; Li, Xinrui[1]; Liu, Changwei[2]; Shang, Yazhuo[1]; Liu, Honglai[1,2]

机构：[1] Key Laboratory of Advanced Materials, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2022

卷号：451

外文期刊名：Chemical Engineering Journal

收录：EI(收录号：20223412594317)

语种：英文

外文关键词：Anodes - Electrochemical electrodes - Ions - Micrometers - Porous silicon - Silicon compounds

摘要：Although silicon is considered as one of the most promising anode materials, challenges related to the huge volume expansion, low conductivity, as well as tedious synthesis process hinder the practical applications. Herein, a micrometer-sized porous silicon/carbon composite (M-pSi@C) is synthesized via a spray drying process and magnesiothermic reduction method. The spherical M-pSi@C composite exhibits high porosity with rich interconnected channels under the protecting carbon shell, which can not only alleviate the volume expansion but also improve the electrode conductivity. The M-pSi@C electrode has demonstrated excellent electrochemical stability and rate performance, delivering a reversible capacity of 1702 mAh g?1 after 250 cycles at 1 A/g, and a high capacity of 1002 mAh g?1 after 500 cycles at 2 A/g with a capacity retention of 95%. This scalable preparation of micrometer-sized Si/C anode offers great potentials for next-generation lithium ion batteries. ? 2022 Elsevier B.V.