无机材料学报2024，Vol.39Issue(9)：992-1004,13.DOI:10.15541/jim20240036
硅泥在锂离子电池中的应用研究进展
Research Progress on the Application of Silicon Slurry in Lithium-ion Batteries
摘要
Abstract
Silicon sludge,the photovoltaic cutting silicon waste,has become one of the expected raw materials for the key silicon carbon anode materials used in high energy density batteries above 300 Wh·kg-1 due to its low cost,two-dimensional lamellar structure and ultrahigh specific capacity(4200 mAh·g-1).However,silicon sludge requires systematic modification because of its challenges such as complex composition,large particle size,poor electrical conductivity,low stability and poor electrochemical performance.This paper systematically reviews the application status and research progress of silicon sludge in lithium-ion batteries.Firstly,the important effects of metal and non-metal impurities on battery performance are summarized,in which metal impurities are normally removed by magnetic separation and acid pickling,and non-metallic impurities are removed by liquid-liquid extraction and heat treatment.Secondly,detailed elucidation about the initial performance and modification methods of the silicon sludge is provided.Concretely,silicon sludge can be nano-sized to reduce expansion by grinding,etching,electrothermal shock,and alloy dealloying,enhance electrical conductivity through doping the intrinsic silicon and doping the carbon layer on the silicon surface,improve stability through the construction of inert layer,conductive layer and functional group,and obtain mechanical support and protection through silicon-carbon composite.Finally,the challenges,development directions and future prospects of silicon-based anode based on silicon sludge are put forward,aiming to provide a reference for converting silicon sludge into treasure and promote the rapid development of high energy density lithium-ion batteries.关键词
硅泥/光伏切割硅废料/废硅粉/硅碳复合/二维硅/锂离子电池/综述Key words
silicon sludge/photovoltaic cutting silicon waste/silicon powder waste/silicon carbon composite/two-dimensional silicon/lithium-ion battery/review分类
化学化工引用本文复制引用
刘鹏东,王桢,刘永锋,温广武..硅泥在锂离子电池中的应用研究进展[J].无机材料学报,2024,39(9):992-1004,13.基金项目
山东省自然科学基金(ZR2022QE244) （ZR2022QE244）
山东省泰山产业领军项目(tscy20230621)Natural Science Foundation of Shandong Province(ZR2022QE244) （tscy20230621）
Project of Taishan Industrial Entrepreneurship Leading Talents(tscy20230621) （tscy20230621）
