文献类型：期刊文献

英文题名：High-Value Resource Utilization of Steel Waste to Prepare Uniform Micronano LiFePO4/C Cathode Material

作者：Zhang, Ting[1,3,4];Song, Jiaxi[3];Zhang, Shanshan[3];Prasada Rao, Rayavarapu[4];Ramakrishna, Seeram[4];Lin, Sen[1,3];Yu, Jianguo[1,2]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Engn Res Ctr Salt Lake Resources Proc Engn, Minist Educ, Shanghai 200237, Peoples R China;[4]Natl Univ Singapore, Ctr Nanofibers & Nanotechnol, Dept Mech Engn, Singapore 117576, Singapore

年份：2024

卷号：16

期号：47

起止页码：64877

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20244717394479);WOS:【SCI-EXPANDED(收录号:WOS:001354573000001)】；

基金：This work was sponsored by the National Natural Science Foundation of China (21978094 and U20A20142), the China Scholarship Council (202306740043), and the Shanghai Rising-Star Program (22QA1402700).

语种：英文

外文关键词：cathode material; LiFePO4; waste-to-resource; high-valueutilization; steel waste; electrochemicalperformance

摘要：Steel slag is a promising secondary resource necessitating recycling and high-value utilization. This study innovatively converted steel slag into micronano FePO4 and well-performing LiFePO4/C through a selective two-step leaching process followed by fast coprecipitation in HMCRR under superior mass transfer, and a subsequent in situ carbothermal reduction afterward, thereby realizing a waste-to-resource conversion pathway. Besides, a metal leaching mechanism was proposed based on comprehensive slag composition analysis, affirming the process selectivity. Thermomechanical analysis for precipitation underscored the importance of controlling reaction pH to prevent the formation of impure sediments. Leveraging efficient leaching and superior mass transfer during precursor preparation, the further-made carbon-coated LiFePO4/C derived from steel slag exhibited favorable morphology and enhanced discharge capacity, especially at high rates, owing to fast ion diffusion kinetics, minimized Li+ migration distance, and improved structure stability. Notably, the discharge capacity could reach 167.44, 153.56, and 119.62 mAh/g at 0.1, 1, and 10 C, respectively.