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Fabrication and Enhanced Supercapacitive Performance of Fe_(2)N@Cotton-based Porous Carbon fibers as Electrode Material
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作者 Guangzhen Zhao Ke Ning +6 位作者 mingqi wei Linlin Zhang Lu Han Guang Zhu Jie Yang Hongyan Wang Fei Huang 《Resources Chemicals and Materials》 2023年第4期277-287,共11页
With the emergence of supercapacitors(SCs),the creation of bio-based electrode materials has grown in significance for the advancement of energy storage.However,it is particularly difficult for cathode materials to me... With the emergence of supercapacitors(SCs),the creation of bio-based electrode materials has grown in significance for the advancement of energy storage.However,it is particularly difficult for cathode materials to meet the demands of practical uses due to their low energy density.Herein,MIL-88 was fabricated in situ on the surface of cotton fibers used in cosmetics,followed by creating Fe_(2)N@porous carbon fiber composite(Fe_(2)N@PCF)through heat treatment at various temperatures.Fe_(2)N@PCF-800 demonstrates excellent specific capacitance performance(552 F g^(-1) at 1 A g^(-1)).Meanwhile,The AC//Fe_(2)N@PCF-800 device exhibits the largest energy density of 38 Wh kg^(-1) at 800 W kg^(-1) and a long cycling stability(83.3%capacity retention after 6000 cycles).Our elaborately designed Fe_(2)N@PCF demonstrate multiple advantages:i)the Fe_(2)N@PCF-800 shows abundant mesopores,providing abundant ion-diffusion pathways for mass transport and rich graphite microstructures,improving electrical conductivity for electron transferowning;ii)the rich nitrogen dopants and Fe_(2)N structure within all carbon components increase the capacitance through their pseudocapacitive contribution.These findings highlight the importance of biomass derived carbon materials for SCs applications. 展开更多
关键词 Cotton fiber Metal-organic frameworks Porous carbon fiber Fe_(2)N SUPERCAPACITORS
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