文献类型：期刊文献

英文题名：Simultaneous gas expansion and nitrogen doping strategy to prepare licorice root residues-derived nitrogen doped porous carbon for supercapacitors

作者：Gao, Jiande[1];Fan, Dongying[2];Liu, Xiong[1]

第一作者：高建德

通信作者：Gao, JD[1]

机构：[1]Gansu Univ Tradit Chinese Med, Res Ctr Tradit Chinese Med Pharmaceut Technol & E, Coll Pharm, Lanzhou 730000, Peoples R China;[2]Gansu Prov Hosp TCM, Lanzhou 730050, Peoples R China

第一机构：甘肃中医药大学药学院（西北中藏药协同创新中心办公室）

通信机构：[1]corresponding author), Gansu Univ Tradit Chinese Med, Res Ctr Tradit Chinese Med Pharmaceut Technol & E, Coll Pharm, Lanzhou 730000, Peoples R China.|[1073501e14fb35863569f]甘肃中医药大学药学院（西北中藏药协同创新中心办公室）;[10735]甘肃中医药大学;

年份：2021

卷号：45

期号：34

起止页码：15469

外文期刊名：NEW JOURNAL OF CHEMISTRY

收录：;EI(收录号：20213610863007);Scopus(收录号：2-s2.0-85114213847);WOS:【SCI-EXPANDED(收录号:WOS:000681400800001)】；

基金：We gratefully acknowledge the National Natural Science Foundation of China (No. 82060821), the Talent Innovation and Entrepreneurship Project of Lanzhou City (2020-RC-65), and the Higher Education Innovation Fund Project of Gansu Province (2020A-080).

语种：英文

外文关键词：Capacitance - Carbon - Electrochemical electrodes - Nitrogen - Ammonia - Potassium hydroxide - Doping (additives) - Electrolytes - Lithium compounds - Porous materials - Supercapacitor - Chemical activation - Expansion - Plants (botany) - Carbonization

摘要：Herein, licorice root residues-derived nitrogen doped porous carbon (NP-LRC) has been prepared via a green and scalable simultaneous gas expansion, activation and nitrogen doping strategy using ammonium chloride (NH4Cl) and potassium hydroxide (KOH) as the mixed activating agent. The decomposition of NH4Cl to produce ammonia (NH3) gas can play a dual role of a gas expansion agent and nitrogen source, while the KOH acts as a typical pore-forming agent during the carbonization process. The obtained NP-LRC has a large specific surface area, developed mesoporous structure and high nitrogen doping content (similar to 4 wt%). As an electrode material for supercapacitors, the NP-LRC exhibits a high specific capacitance of 221 F g(-1) at 0.5 A g(-1) and excellent rate capability (80.5% capacitance retention even at 20 A g(-1)). Moreover, the symmetric supercapacitor assembled based on the NP-LRC electrode material and 1 M Li2SO4 aqueous electrolyte exhibits an energy density of 11.7 W h kg(-1) at a high power density of 450 W kg(-1) operated in the voltage range of 1.8 V, and outstanding cyclability of 96% capacitance retention after 10 000 cycles.