陕西科技大学学报2024，Vol.42Issue(5)：1-9,9.
杂原子掺杂木质素基碳纤维的制备及其在超级电容器中的应用
Preparation of heteroatom-doped lignin-based carbon fibers and their application in supercapacitors
摘要
Abstract
Lignin has become an excellent carbon precursor material for the study of low-cost super-capacitor electrode materials due to its high carbon content.In order to achieve high-value utilization of lignin and obtain high-performance supercapacitors,it is necessary to study lignin carbon fiber(LCF)with excellent pore structure and both electric double-layer capacitance and pseudo-capacitor energy storage methods.LCF were treated by mixed acid chemical oxidation of H2 SO4/HNO3 and simple hydrothermal doping with heteroatom to study the effects of different treatment methods on their specific surface area and pore structure.The results showed that the specific surface area of the untreated LCF sample was 317.4 m2·g-1 and the specific capacitance was 6.2 F·g-1.The S,N-LCF sample treated with mixed acid chemical oxidation of H2SO4/HNO3 obtained more micropores,with a specific surface area of 611.6 m2·g-1 and a specific capacitance of 23.0 F·g-1(0.5 A·g-1).Under hydrothermal conditions,the nickel-cobalt-manganese-sulfur heteroatom-doped sample(HLCF)improves the electrochemical properties of its electrode material due to the doping of the heteroatoms,which increases its specific capacitance to 15.4 F·g-1(0.5 A·g-1).The sample S,N-HLCF2 treated consecutively using both methods increased its specific capacitance to 46.8 F·g-1(0.5 A·g-1)due to the suitable pore structure and increased pseudocapacitance from heteroatom doping.关键词
木质素碳纤维/电极材料/超级电容器Key words
lignin-based carbon fibers/electrode material/supercapacitor分类
轻工纺织引用本文复制引用
康嘉,游翔宇,王柃捷,周琳菲,李欣鸿,张慧洁..杂原子掺杂木质素基碳纤维的制备及其在超级电容器中的应用[J].陕西科技大学学报,2024,42(5):1-9,9.基金项目
国家自然科学基金项目(22002079,31901264) （22002079,31901264）
陕西省科技厅重点研发计划项目(2023-YBGY-485) （2023-YBGY-485）
