Walnut septum-derived hierarchical porous carbon for ultra-high-performance supercapacitors

作     者：Meng Zhou Sheng-Xue Yan Qing Wang Ming-Xiu Tan Deng-Yang Wang Zi-Qi Yu Shao-Hua Luo Ya-Hui Zhang Xin Liu Meng Zhou;Sheng-Xue Yan;Qing Wang;Ming-Xiu Tan;Deng-Yang Wang;Zi-Qi Yu;Shao-Hua Luo;Ya-Hui Zhang;Xin Liu

作者机构：School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China State Key Laboratory of Rolling and AutomationNortheastern UniversityShenyang 110819China School of Resources and MaterialsNortheastern University at QinhuangdaoQinhuangdao 066004China Hebei Key Laboratory of Dielectric and Electrolyte Functional MaterialQinhuangdao 066004China Qinhuangdao Key Laboratory of Advanced Energy Storage and Conversion TechnologyQinhuangdao 066004China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2022年第41卷第7期

页      面：2280-2291页

核心收录：

学科分类：081702[工学-化学工艺] 080801[工学-电机与电器] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：financially supported by the National Natural Science Foundation of China (Nos. 51874079 and 11775226) the Natural Science Foundation of Hebei Province (Nos. E2018501091, E2020501001 and E2021501029) Hebei Province Key Research and Development Plan Project (No.19211302D) the Natural Science Foundation of Liaoning Province (No. 2019-MS-110) the Fundamental Research Funds for the Central Universities (No. N2023040 and N2123035) 

主　　题：Activation Biocarbon Micro-mesoporous structure Supercapacitor High specific capacitance 

摘      要：The conversion of biomass waste into eco-nomical and high-performance energy storage devices receives significant ***,a facile and green method to prepare porous active carbon from walnut sep-tum is applied to the electrode materials of *** effect of chemical etching reagent(KOH)on the microstructure and specific capacitance of the porous car-bon are *** modified BC-2.0,with a KOH/walnut septum mass ratio of 2∶1,exhibits large specific surface area of 1003.9 m^(2)·g^(-1)with hierarchical micro-mesoporous ***-2.0 reveals a superior specific capacitance of 457 F·g^(-1)at 1 A·g^(-1).The flexible sym-metric supercapacitor in gel electrolyte(KOH/PVA)exhi-bits considerable synergetic energy-power output *** results indicate that walnut septum is a better precursor to obtain activated carbons relative to other biomass carbon *** large mesoporosity after activation effectively boosts the electrochemical properties of ***,the walnut septum has potential to be a superior electrode material for supercapacitors.