Rational design of three-dimensional branched NiCo-P@CoNiMo-P core/shell nanowire heterostructures for high-performance hybrid supercapacitor  

作　　者：Yijing Huang Chong Luo Qiaobao Zhang Hehe Zhang Ming-Sheng Wang 

机构地区：[1]State Key Lab of Physical Chemistry of Solid Surfaces,College of Materials,Xiamen University,Xiamen 361005,Fujian,China

出　　处：《Journal of Energy Chemistry》2021年第10期489-496,I0013,共9页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grants Nos.52072323 and 51872098);the Leading Project Foundation of Science Department of Fujian Province(Grants No.2018H0034);the“Double-First Class”Foundation of Materials and Intelligent Manufacturing Discipline of Xiamen University;the financial support from the Opening Project of National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials,&Henan Key Laboratory of High-temperature Structural and Functional Materials,Henan University of Science and Technology(Grants No.HKDNM2019013)。

摘　　要：Owing to the dramatically enhanced charge-mass transport and abundant electrochemically active sites,transition metal compound electrodes are increasingly attractive for achieving high-performance supercapacitors(SCs).Here,we report the fabrication of nickel foam supported three-dimensional(3 D)branched nickel-cobalt phosphides@tri-metal cobalt-nickel-molybdenum phosphides core/shell nanowire heterostructures(denoted as NiCo-P@CoNiMo-P)as high-performance electrode materials for hybrid supercapacitors.The presence of multiple valences of the cations in such NiCo-P@CoNiMo-P enables rich redox reactions and promoted synergy effects.Benefiting from their collective effects,the resulting electrode demonstrates high specific capacity of 1366 C g^(-1) at 2 A g^(-1)(2.03 C cm^(-2) at2 mA cm^(-2))and 922 C g^(-1) at 10 A g^(-1),as well as good cycling stability(retaining~94%of the initial capacity after 6000 cycles at 15 A g^(-1)).A hybrid SC using the NiCo-P@CoNiMo-P as the positive electrode and N-doped rGOs as the negative electrode exhibits a high energy density of 81.4 Wh kg^(-1) at a power density of 1213 W kg^(-1) and a capacity retention of 132%even after 6000 cycles at 10 A g^(-1).Our findings can facilitate the material design for boosting the performance of transition metal compounds based materials for fast energy storage.

关 键 词：Transition metal phosphides Branched nanowire heterostructures Electrode materials Hybird supercapacitors 

分 类 号：TM53[电气工程—电器] TB34[一般工业技术—材料科学与工程]