河北科技大学学报2025，Vol.46Issue(2)：186-195,10.DOI:10.7535/hbkd.2025yx02008
锌/硫共掺杂硬碳材料的储钠性能研究
Study on sodium storage performance of zinc/sulfur co-doped hard carbon materials
摘要
Abstract
To enhance the sodium storage capacity,cycling stability and rate performance of hard carbon(HC)materials,high-temperature pyrolysis was employed to achieve doping of various heteroatoms(Zn,S,and Zn/S co-doping)into the HC materials.Using the continuous etching of the carbon framework by ZnS particles,which were formed during the pyrolysis of carbon precursors,abundant pore structures were generated to increase the number of active sites.During Zn/S co-doping process,the pyrolysis temperature was adjusted to 1 050℃and the H-Zn/S-HC-1050 carbon material was obtained after acid treatment.The composition and microstructure of the material were characterized,and its electrochemical performance was tested.The results indicate that the reversible discharge specific capacity of H-Zn/S-HC-1050 carbon material was 276.26 mA·h/g at a current density of 50 mA/g,which was 15.46%higher than the original Zn/S-HC carbon material with a specific capacity of 239.26 mA·h/g;After 100 charge-discharge cycles at a current density of 100 mA/g,reversible specific capacity still maintains at 201.65 mA·h/g.The modified H-Zn/S-HC-1050 carbon material can fully leverage the synergistic effect of Zn/S co-doping through optimizing carbonization and reducing impurity attachment,which provides some reference for the development of high-performance hard carbon materials.关键词
电池/硬碳材料/杂原子掺杂/改性策略/微观结构Key words
battery/hard carbon material/heteroatom doping/modification strategy/microstructure分类
化学工程引用本文复制引用
曹伟,徐晓阳,张向京,许跃龙..锌/硫共掺杂硬碳材料的储钠性能研究[J].河北科技大学学报,2025,46(2):186-195,10.基金项目
国家自然科学基金(22375056) （22375056）
河北省自然科学基金(B2024208006) （B2024208006）
河北省科学院科技计划项目(24703) （24703）
