新型炭材料（中英文）2024，Vol.39Issue(2)：297-307,11.DOI:10.1016/S1872-5805(24)60842-5
采用两步炭化法和熔盐模板法制备N、S共掺杂煤基硬炭及共储钠性能
N,S co-doped coal-based hard carbon prepared by two-step carboniz-ation and a molten salt template method for sodium storage
摘要
Abstract
Hard carbon,known for its abundant resources,stable structure and high safety,has emerged as the most popular an-ode material for sodium-ion batteries(SIBs).Among various sources,coal-derived hard carbon has attracted extensive attention.In this work,N and S co-doped coal-based carbon material(NSPC1200)was synthesized through a combination of two-step carboniza-tion process and heteroatom doping using long-flame coal as a carbon source,thiourea as a nitrogen and sulfur source,and NaCl as a template.The two-step carbonization process played a crucial role in adjusting the structure of carbon microcrystals and expanding the interlayer spacing.The N and S co-doping regulated the electronic structure of carbon materials,endowing more active sites.Ad-ditionally,the introduction of NaCl as a template contributed to the construction of pore structure,which facilitates better contact between electrodes and electrolytes,enabling more efficient transport of Na+and electrons.Under the synergistic effect,NSPC1200 exhibited exceptional sodium storage capacity,reaching 314.2 mAh g-1 at 20 mA g-1.Furthermore,NSPC1200 demonstrated com-mendable cycling stability,maintaining a capacity of 224.4 mAh g-1 even after 200 cycles.This work successfully achieves the stra-tegic tuning of the microstructure of coal-based carbon materials,ultimately obtaining hard carbon anode with excellent electrochem-ical performance.关键词
硬炭/钠离子电池/煤衍生炭/两步炭化/氮硫共掺杂Key words
Hard carbon/Sodium-ion battery/Coal-derived carbon/Two-step carbonization/N and S co-doped分类
化学化工引用本文复制引用
牛慧祝,王海花,孙立宇,杨晨榕,王雨,曹瑞,杨存国,王洁,舒珂维..采用两步炭化法和熔盐模板法制备N、S共掺杂煤基硬炭及共储钠性能[J].新型炭材料（中英文）,2024,39(2):297-307,11.基金项目
The authors express sincere thanks to the Nation-al Natural Science Foundation of China(21978164,22078189 and 22105120),Outstanding Youth Sci-ence Fund of Shaanxi Province(2021JC-046),Spe-cial Support Program for high level talents of Shaanxi Province,Innovation Support Program of Shaanxi Province(2021JZY-001),Key Research and Develop-ment Program of Shaanxi Province(2020GY-243)and Special Research Fund of Education Department of Shaanxi(20JK0535). 国家自然科学基金(21978164、22078189、22105120) （21978164,22078189 and 22105120）
陕西省杰出青年科学基金(2021JC-046) （2021JC-046）
陕西省高层次人才专项支持计划 （）
陕西省创新支持计划(2021JZY-001) （2021JZY-001）
陕西省重点研发计划项目(20120GY-243) （20120GY-243）
陕西省教育厅专项科研基金(20JK0535). （20JK0535）
