新型炭材料（中英文）2026，Vol.41Issue(4)：917-927,11.DOI:10.1016/S1872-5805(26)61106-7
微孔限域与化学键合协同稳定硫物种的煤基硬炭及其储钠机制
The stabilization of sulfur species in coal-derived hard carbon by micropore confinement and chemical bonding to improve sodium storage
摘要
Abstract
To solve the problems of limited capacity,low initial coulombic efficiency,and poor long-term cycling stability in hard carbon anodes for sodium-ion batteries,a stabilization strategy is reported that uses both micropor-ous confinement and chemical bonding to control the sul-fur species.Hard carbon is derived from bituminous coal,taking advantage of its naturally condensed aromatic framework.Using a two-step thermal process,a micropor-ous carbon framework was constructed,followed by gas-phase sulfidation to introduce sulfur species.The sulfur is confined in the micropores while forming stable covalent C-S bonds with the carbon matrix,which stabilizes the sul-fur by both physical and chemical means and thus sup-presses sulfur migration,which prevents interfacial side reactions and introduces additional redox-active sites.As a result,the sample delivers a high reversible capacity of 450 mAh/g after 800 cycles at a current density of 1 A/g,with excellent rate cap-ability and cycling stability.Analysis of the storage mechanism shows that the stabilized sulfur species can reversibly particip-ate in the sodium-ion storage and improve interfacial kinetics.关键词
钠离子电池/煤基硬炭/硫物种稳定/微孔限域/化学键合Key words
Sodium-ion batteries/Coal-derived hard carbon/Sulfur stabilization/Micropore confinement/Chemical bonding分类
化学化工引用本文复制引用
朱宏,常丽萍,崔煜,韩琪,李存鹤,周瑞,池晓雨,申岩峰,王美君,郭春丽..微孔限域与化学键合协同稳定硫物种的煤基硬炭及其储钠机制[J].新型炭材料（中英文）,2026,41(4):917-927,11.基金项目
The authors gratefully acknowledge the financial support of National Natural Science Foundation of China(22408263,22378291),Foundation Research Program of Shanxi Province(202403021221037),and the special fund for Science and Technology Innova-tion Teams of Shanxi Province(202304051001027). （22408263,22378291）
