电源技术2025，Vol.49Issue(9)：1846-1851,6.DOI:10.3969/j.issn.1002-087X.2025.09.008
氮掺杂介孔碳材料制备及其在锂硫电池中的应用研究
Preparation of nitrogen doped mesoporous carbon materials and its application in lithium sulfur batteries
于凯 1刘宇楠 2米娟 3孙蔷2
作者信息
- 1. 东北大学冶金学院,辽宁沈阳 110819||东北大学冶金与材料工程国家级实验教学示范中心,辽宁沈阳 110819
- 2. 东北大学冶金学院,辽宁沈阳 110819
- 3. 中国电子科技集团公司第十八研究所,天津 300384
- 折叠
摘要
Abstract
The study developed a method for preparing nitrogen doped mesoporous carbon impreg-nated sulfur composite cathode materials based on polydopamine coated nickel template method,tar-geting key issues such as poor electronic conductivity of active sulfur and discharge product lithium sulfide in lithium sulfur batteries,and rapid capacity decay caused by inherent shuttle effect of lithium polysulfide.By regulating the content of dopamine precursors,C-300 and C-600 nitrogen doped mesoporous carbon materials with differentiated pore structures were prepared.Structural characterization shows that C-300 material has higher structural defect density(ID/IG=2.82),larger specific surface area(798 m2/g),and pore volume(1.83 cm3/g),which are increased by 57.7％,57.7％,and 96.8％respectively compared to C-600 material.Electrochemical analysis shows that the opti-mized multi-level pore structure enables the S@C-300 nitrogen doped mesoporous carbon/sulfur com-posite cathode material to exhibit excellent cycling stability at a rate of 0.5 C.After 100 cycles,the dis-charge specific capacity still maintains 850 mAh/g,with a capacity decay of 0.403％per-cycle,while maintaining nearly 100％coulombic efficiency.关键词
介孔碳/氮掺杂/正极材料/锂硫电池/电化学Key words
mesoporous carbon/nitrogen doping/positive electrode material/lithium sulfur battery/electrochemical analysis分类
信息技术与安全科学引用本文复制引用
于凯,刘宇楠,米娟,孙蔷..氮掺杂介孔碳材料制备及其在锂硫电池中的应用研究[J].电源技术,2025,49(9):1846-1851,6.
