筛分沥青组分以制备高性能硬炭负极
Selecting the molecular components of a pitch to produce a hard car-bon anode with a high sodium storage capacity
摘要
Abstract
Pitch is an excellent precursor for the production of hard carbon,with pre-oxidation crucial process in the fab-rication.The structural changes in the different molecular components of pitch during thermochemical treatment are a key factor in determining the sodium-ion storage of pitch-based hard carbon anodes.We investigated the effects of the different molecular structures in the asphaltene precursor,in-cluding aromatic rings and aliphatic chains,on the sodium-ion storage behavior of the resulting carbon.We found that polar oxygen functional groups limit the steric hindrance caused by the aromatic rings in pitch,and thus facilitate the introduction of cross-linked structures.During high-temperat-ure carbonization,aromatic rings form a rigid carbon frame-work that prevents the rearrangement of ordered carbon layers,leading to a short-range disordered carbon structure and pro-motes the production of closed pores.For example,a material prepared from asphaltene,which contains a large number of oxy-gen-containing functional groups and macromolecular aromatic rings,using pre-oxidation at 300 ℃ and carbonization at 1200 ℃ had a reversible capacity of 316.7 mAh g-1 when used as the anode for sodium ion batteries.Our research provides a theoret-ical basis for the selection of raw materials for the development of high-quality pitch-based hard carbons.关键词
储能/沥青质/预氧化/硬炭/钠离子电池Key words
Energy storage/Asphaltene/Pre-oxidation/Hard carbon/Sodium-ion batteries分类
化学化工引用本文复制引用
王培祥,吴明铂,王斌,李玉琪,王万里,孙义,宋龙森,刘晨昊,P. Iamprasertkun,胡涵..筛分沥青组分以制备高性能硬炭负极[J].新型炭材料（中英文）,2026,41(1):142-156,15.基金项目
国家自然科学基金(22309206,22179145,21975287,22138013) （22309206,22179145,21975287,22138013）
国家重点研发计划子课题(2023YFB4203702,2023YFB4203703) （2023YFB4203702,2023YFB4203703）
山东省自然科学基金(ZR2020ZD08) （ZR2020ZD08）
山东省泰山学者项目(tsqn20221117) （tsqn20221117）
山东省优秀青年科学基金项目(海外)(2024HWYQ-047) （海外）
青岛市国家自然科学基金(23-2-1-24-zyyd-jch).This work was financially supported by the Na-tional Natural Science Foundation of China(22309206, 22179145, 21975287 and 22138013), Na-tional Key Research and Development Program(2023YFB4203702, 2023YFB4203703) Shandong Provincial Natural Science Foundation(ZR2020ZD08), Taishan Scholars Program of Shan-dong Province (tsqn20221117), Shandong Provincial Excellent Young Scientists Fund Program (Overseas)(2024HWYQ-047), National Natural Science Founda-tion of Qingdao (23-2-1-24-zyyd-jch). （23-2-1-24-zyyd-jch）
