铜业工程Issue(1)：56-62,7.DOI:10.3969/j.issn.1009-3842.2025.01.007
整片纳米多孔Cu/Co3Sn2/Sn负极的可控制备与储锂性能研究
Controllable Preparation and Lithium Storage Performance of Monolithic Nanoporous Cu/Co3Sn2/Sn Anode
摘要
Abstract
The commercially available graphite anodes,which are widely used today,can no longer meet the demand for future high-en-ergy-density batteries due to their relatively low theoretical specific capacity.Therefore,developing new anode materials with higher specific capacity has become an urgent task.Tin-based materials,with their high theoretical specific capacity and low lithium intercala-tion potential,are considered one of the most promising next-generation anode materials for lithium-ion batteries.However,the signifi-cant volume expansion that occurs during the delithiation/lithiation process in tin-based materials often damages the electrode struc-ture,leading to rapid battery capacity degradation.To address this issue,this study successfully synthesized a nanoporous Cu/Co3Sn2/Sn anode with a nanoporous structure through chemical dealloying and electrochemical deposition techniques.The nanoporous structure provided abundant pore space,which effectively buffered the stress during volume expansion and enhanced electrolyte infiltration.Meanwhile,in Sn-Co active-inert system,the inert component Co could suppress the volume change of Sn during the delithiation/lithia-tion process,ensuring the mechanical stability of the electrode during cycling.Furthermore,the design of the entire electrode eliminat-ed the need for binders and conductive agents,reducing side electrochemical reactions.As a result,the designed anode material exhib-ited excellent electrochemical performance.At a current density of 1 A/g,Cu/Co3Sn2/Sn-100 anode electrode achieved an initial revers-ible capacity of 591 mAh/g,with a first-cycle Coulombic efficiency exceeding 91%.Even after 400 cycles,its capacity remained at 367 mAh/g,with a capacity retention rate of 65.7%.关键词
锡基负极材料/纳米多孔结构/锂离子电池/活-惰性体系/体积膨胀Key words
tin-based anode material/nanoporous structure/lithium-ion battery/active-inert system/volume expansion分类
动力与电气工程引用本文复制引用
刘相江,刘文博..整片纳米多孔Cu/Co3Sn2/Sn负极的可控制备与储锂性能研究[J].铜业工程,2025,(1):56-62,7.基金项目
国家自然科学基金面上项目(52075351)资助 （52075351）
