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3D Mesoporous Ni(OH) 2 /WS 2 Nanofibers with Highly Enhanced Performances for Hybrid Supercapacitors
Author(s) -
Jiang Zimin,
Xu Tingting,
Dai Shuge,
Yan Congcong,
Ma Caiyun,
Wang Xinchang,
Xu Junmin,
Zhang Sen,
Wang Ye
Publication year - 2019
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201800476
Subject(s) - nanofiber , supercapacitor , materials science , mesoporous material , electrospinning , electrode , chemical engineering , tungsten disulfide , graphene , power density , nanotechnology , specific surface area , current density , nanostructure , energy storage , tungsten , electrochemistry , composite material , chemistry , catalysis , organic chemistry , metallurgy , polymer , power (physics) , physics , quantum mechanics , engineering
3D Ni(OH) 2 /tungsten disulfide (WS 2 ) nanofibers composed of ultrathin nanoflakes are synthesized by electrospinning followed by a hydrothermal process, which have a large specific surface of 64.56 m 2 g −1 . When tested in a three‐electrode configuration, the WS 2 /Ni(OH) 2 nanofiber‐based electrode exhibits a high specific capacity of 354 C g −1 at a current density of 1 A g −1 . The hybrid storage device, in which WS 2 /Ni(OH) 2 nanofibers and graphene are used as the positive and negative electrodes, respectively, exhibits a high energy density of 34 Wh kg −1 at a power density of 940 W kg −1 and a high capacity retention of 83% after 4000 cycles at 4 A g −1 . The as‐synthesized 3D Ni(OH) 2 /WS 2 nanofibers provide a way for the WS 2 nanostructure to optimize its viability and potential in constructing a high‐performance energy storage device.
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