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Construction of NiTe/NiSe Composites on Ni Foam for High‐Performance Asymmetric Supercapacitor
Author(s) -
Ye Beirong,
Huang Miaoliang,
Bao Quanlin,
Jiang Si,
Ge Jinhua,
Zhao Huang,
Fan Leqing,
Lin Jianming,
Wu Jihuai
Publication year - 2018
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201701033
Subject(s) - supercapacitor , capacitance , materials science , electrode , composite number , composite material , current density , electrochemistry , power density , power (physics) , chemistry , physics , quantum mechanics
NiTe/NiSe composites grown in situ on Ni foam are successfully developed as a binder‐free electrode for supercapacitors. The as‐obtained NiTe/NiSe composite electrode exhibits excellent electrochemical properties with a higher specific capacitance of 1868 F g −1 (5.60 F cm −2 ) at a current density of 1 A g −1 . In addition, an asymmetric supercapacitor is fabricated with NiTe/NiSe as the positive material and active carbon (AC) as the negative material. The resulting NiTe/NiSe//AC device exhibits a high energy density of 33.7 Wh kg −1 at a power density of 800 W kg −1 , providing good cycling performance that retained 86.2 % of the initial capacitance at 2 A g −1 after 5000 cycles. All of the results illustrate that the NiTe/NiSe electrode is promising for potential application in supercapacitors and other fields.