文献类型：期刊文献

英文题名：Scalable engineering of porous micro-sized Si-C composites through direct conversion of CO2 toward high-energy lithium-ion batteries

作者：Liang, Han[1];Wang, Rui[1];Fang, Biao[1];Mo, Runwei[1,2]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200030, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Key Lab Intelligent Sensing & Detect Tech, Shanghai 200237, Peoples R China

年份：2025

卷号：652

外文期刊名：JOURNAL OF POWER SOURCES

收录：;EI(收录号：20252518624241);WOS:【SCI-EXPANDED(收录号:WOS:001514234600002)】；

基金：This research was supported by Shanghai pilotProgram for Basic Research (grant no. 22TQ1400100-8) , Shanghai Pujiang Program (grant no. 20PJ1402500) , Natural Science Foundation of Shanghai (grant no. 22ZR1416600) and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：High-value CO 2 conversion; Silicon-carbon composite; In-situ observation; Lithium-ion battery

摘要：Converting carbon dioxide (CO2) as a resource into high-value battery materials is of great significance to solve the problem of excessive CO2 emissions. Among them, micro-sized silicon have attracted much attention as lithium-ion batteries (LIBs) anodes due to their high energy density, low cost and low side reactions. However, low electrical conductivity and large volume expansion limit commercialization of micro-sized Si. In this work, we develop an innovative thermal reduction method to prepare porous micro-sized Si-C composites by reacting carbon dioxide as a carbon source with a commercial alloy. Such composites possess excellent structural and electrochemical stability, electronic and ionic conductivity, enabling their use as high-performance anodes with high reversible capacity (e.g., 1540.4 mA h g-1), outstanding rate performance (e.g., 765.2 mA h g-1 at 2 A g-1), and excellent cycling stability (e.g., 81.7 % capacity retention for 120 cycles at 0.5 A g-1). Interestingly, the structural stability of electrode during lithiation is directly demonstrated using in-situ optical microscopy. In pouch cells with NCM811 cathodes, the full cells achieve 82.4 % capacity retention after 200 cycles at 0.5 A g-1. This work paves the way for the large-scale conversion of CO2 into high-value products for the future development of high-performance energy storage systems.