Templated synthesis of spinel cobaltite MCo_(2)O_(4) (M¼Ni, Co and Mn) hierarchical nanofibers for high performance supercapacitors  

作　　者：Xuemin Yin Hejun Li Ruimei Yuan Yameng Jiao Jinhua Lu 

机构地区：[1]State Key Laboratory of Solidification Processing,Shaanxi Province Key Laboratory of Fiber Reinforced Light Composite Materials,Carbon/Carbon Composites Research Center,Northwestern Polytechnical University,Xi’an,710072,China

出　　处：《Journal of Materiomics》2021年第4期858-868,共11页无机材料学学报（英文）

基　　金：support from National Natural Science Foundation of China(51821091,51872233);the Natural Science Foundation of Shaanxi Province(2018JM5044)。

摘　　要：Rational construction of transitional metal oxides electrode materials with suitable structure and composition is an effective strategy of improving their electrochemical performance.Herein,novel MCo_(2)O_(4) hierarchical nanofibers(H-MCo_(2)O_(4)NFs,M¼Ni,Co and Mn)were fabricated by a multi-step selftemplating method using electrospun nanofibers as precursors.Benefiting from the unique structure,such as numerous of vertically interlinked nanosheets on the surface and 1D interwoven nanofibers networks,the obtained HeNiCo_(2)O_(4)NFs electrode exhibits a high specific capacitance of 1750 F g1(At a current density of 0.5 A g1),good rate capability(Capacitance retention of 70%at 20 A g1),and outstanding cycling stability(Capacitance retention of 92%after 6000 cycles).Moreover,the solid-state hybrid supercapacitor assembled by HeNiCo_(2)O_(4)NFs and activated carbon(AC),delivers a high energy density of 38.4 Wh kg1 at a power density of 800 W kg1,and excellent cycling stability.Thus,the HeNiCo_(2)O_(4)NFs is a promising candidate material for supercapacitors electrode and this self-templating method in this work also provides a new path for the preparation of one-dimensional hierarchical metallic oxides.

关 键 词：Electrospinning Supercapacitor NiCo_(2)O_(4) Hierarchical nanofibers Self-templating method 

分 类 号：TM53[电气工程—电器] TB383.1[一般工业技术—材料科学与工程]