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Construction of NiCo_(2)O_(4) nanoflake arrays on cellulose-derived carbon nanofibers as a freestanding electrode for high-performance supercapacitors

查看全文 作　　者：Xuepeng [1]Ni;Kunming [1]Li;Changlei [3]Li;Qianqian [1]Wu;Chenglin [1]Liu;Huifang [1,2]Chen;Qilin [1,2]Wu;Anqi [1,2]Ju 高影响力作者 机构地区：[1]College of Materials Science and Engineering&State Key Laboratory for Modification of Chemical Fibers and Polymer Materials,Donghua University,Shanghai 201620,China;[2]Key Laboratory of High-Performance Fibers&Products,Ministry of Education,Donghua University,Shanghai 201620,China;[3]Weifang Xinlong Biomaterial Co.,Ltd.,Weifang 261000,China高影响力机构 出　　处：《Frontiers of Chemical Science and Engineering》索引2023年第17卷第6期,共13页高影响力期刊 基　　金：supported by Key Support Project of State Key Laboratory for Modification of Chemical Fibers and Polymer Materials(Grant No.21M1060212);Open Project of Shanghai Key Laboratory of Lightweight Structural Composite Materials(Grant No.2232019A4-02);National Natural Science Foundation of China(Grant No.51503086);the Fundamental Research Funds for the Central Universities and Graduate Student Innovation Fund of Donghua University(Grant No.CUSF-DH-D-2022013). 摘　　要：Cellulose has a wide range of applications in many fields due to their naturally degradable and low-cost characteristics,but few studies can achieve cellulose-nanofibers by conventional electrospinning.Herein,we demonstrate that the freestanding cellulose-based carbon nanofibers are successfully obtained by a special design of electrospinning firstly,pre-oxidation and high-temperature carbonization(1600℃),which display a superior electrical conductivity of 31.2 S·cm^(-1)and larger specific surface area of 35.61 m^(2)·g^(-1)than that of the polyacrylonitrile-based carbon nanofibers(electrical conductivity of 18.5 S·cm^(-1),specific surface area of 12 m^(2)·g^(-1).The NiCo_(2)O_(4)nanoflake arrays are grown uniformly on the cellulose-based carbon nanofibers successfully by a facile one-step solvothermal and calcination method.The as-prepared cellulose-based carbon nanofibers/NiCo_(2)O_(4)nanoflake arrays are directly used as electrodes to achieve a high specific capacitance of 1010 F·g^(-1)at 1 A·g^(-1)and a good cycling stability with 90.84%capacitance retention after 3000 times at 10 A·g^(-1).Furthermore,the all-solid-state symmetric supercapacitors assembled from the cellulose-based carbon nanofibers/NiCo_(2)O_(4)deliver a high energy density of 62 W·h·kg(-1) at a power density of 1200 W·kg^(-1).Six all-solid-state symmetric supercapacitors in series can also power a‘DHU’logo consisted of 36 light emitting diodes,confirming that the cellulose-based carbon nanofiber is a promising carbon matrix material for energy storage devices. 关 键 词：CELLULOSE carbon nanofibers NiCo_(2)O_(4) SUPERCAPACITORS
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