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Synthesis of porous flower‐like Ni‐Co‐Mo‐S nanostructures on Ni foam for battery‐supercapacitor hybrid devices
Author(s) -
Zhu Jiahui,
Wang Yan,
Xu Yan,
Li Siqi,
Ren Jianwei,
Cai Wangfeng
Publication year - 2020
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.5102
Subject(s) - sulfidation , supercapacitor , materials science , ternary operation , nanostructure , transition metal , chemical engineering , battery (electricity) , electrode , capacitance , porosity , energy storage , nanotechnology , inorganic chemistry , composite material , metallurgy , chemistry , catalysis , organic chemistry , sulfur , power (physics) , physics , quantum mechanics , computer science , engineering , programming language
The synergistic effects of multiple components and unique nanostructures were contributed to prepare the high‐performance battery‐type electrode materials. In this work, Mo element was introduced to form the ternary transition metal oxides/hydroxides of Ni‐Co to improve conductivity, and then charge transfer was accelerated to enhance the capacity storage. After sulfidation, the electrical conductivity was further improved, and a porous flower‐like nanostructure was formed. Except for that, the composites of transition metal oxides/hydroxides and sulfides were formed via sulfidation. With the help of the synergistic effects of multiple components and a porous flower‐like nanostructure, more Faradic redox reactions occurred. Therefore, the as‐prepared porous flower‐like Ni‐Co‐Mo‐S nanostructures on Ni foam exhibited an excellent areal capacitance of 7.22 C·cm −2 at 5 mA·cm −2 and long‐cycle stability (96.9% retention after 5000 cycles). Furthermore, a coin‐type battery‐supercapacitor hybrid (BSH) device was assembled, which achieved 54.54 Wh·kg −1 at 540 W·kg −1 and displayed 74.8% capacitance retention after 3500 cycles. All mentioned above demonstrated that ternary transition metal oxides/hydroxides precursors via sulfidation can form special structures and the composites of transition metal oxides/hydroxides and sulfides to prepare high‐performance battery‐type electrodes for energy storage.