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Cellulose Nanofibers Derived Carbon Aerogel with 3D Multiscale Pore Architecture for High-Performance Supercapacitors
作者:Lumin Chen, Houyong Yu, Ziheng Li, Xiang Chen, Wenlong Zhou
關鍵字:Cellulose nanofibers, Carbon aerogels, Hierarchical porous structure, Symmetric supercapacitors
論文來源:期刊
發表時間:2021年

Carbon materials are highly promising electrode materials for supercapacitors, due to their hierarchical porous structure and large specific surface area. However, the limited specific capacitance and inferior rate capability significantly prevent their practical application. Herein, 3D interconnected hierarchical porous carbon aerogels (CNFAs) through engineering the pyrolysis chemistry of CNF is developed. The obtained CNFAs effectively improve the carbon yield and suppress the volume shrinkage, as well as have robust mechanical property. As supercapacitor electrodes, the CNFAs-17% electrode exhibit an ultrahigh capacitance of 440.29 F g?1 at 1 A g?1, significantly superior to most reported biomass-based carbon materials. Moreover, the CNFAs-17% assembled symmetric supercapacitor (SSC) achieves an outstanding rate capability (63.29% at 10 mA cm?2),high areal energy density(0.081 mWh cm-2), and remarkable cycle stability (nearly 100% capacitance retention after 7000 cycles). This work offers a simple, effective strategy towards the preparation of promising electrode materials for high-performance energy storage applications.

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