煤炭转化2025，Vol.48Issue(4)：26-36,11.DOI:10.19726/j.cnki.ebcc.202504003
煤沥青衍生碳纤维结构调控及电化学性能
Structural modulation and electrochemical performance of coal pitch derived carbon fibers
摘要
Abstract
Coal pitch,due to its wide availability,high carbon content,and high degree of aromatization,is considered an excellent precursor for the preparation of graphitized porous carbon.However,its significant thermoplastic characteristics poses challenges for pore structure regulation carbon electrode fabrication.In this study,coal pitch tetrahydro furan-soluble fractions and polyacrylo-nitrile(PAN)blends were used as precursors to prepare coal pitch-derived porous carbon fibers via electrospinning,pre-oxidation,and coactivation-carbonization treatment.The effects of the activa-tion process-including activator concentration and activation temperature—on the structure and elec-trochemical performance of the materials were systematically investigated.The results show that the activation process can effectively balance the specific surface area and the degree of graphitization of the resulting materials.In particular,the coal pitch-derived porous carbon fiber(A3PCNF-800),pre-pared at an activator concentration of 3 mol/L and an activation temperature of 800 ℃,exhibits a spe-cific surface area of 1 627.2 m2/g and a high degree of disorder(ID/IG=1.09).This sample delivers a specific capacitance of 254.5 F/g at a current density of 0.5 A/g,and maintained 84.7％of its capaci-tance when the current density increases to 5 A/g.When assembled into a symmetric supercapacitor,the device achieves a maximum energy density of 16.56 Wh/kg at a power density of 162.5 W/kg,with capacitance retention and Coulombic efficiency reaching 97.05％and 98.95％,respectively,after 10 000 charge-discharge cycles at 5 A/g.关键词
煤沥青/超级电容器/多孔炭/电化学性能Key words
coal pitch/supercapacitor/porous carbon/electrochemical performance分类
化学化工引用本文复制引用
曹亚敏,赵佳辉,岳鲁超,王建成,米杰,冯宇..煤沥青衍生碳纤维结构调控及电化学性能[J].煤炭转化,2025,48(4):26-36,11.基金项目
国家自然科学基金资助项目(22378292,21908156)和山西省应用基础研究计划项目(202403021224005,202303021211072). （22378292,21908156）
