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Hakimyfard A, Samimifar M, Ostadjoola S, Khademinia S, Kafi‐Ahmadi L. L _x ‐β‐NiMoO ₄ (L = None, Al, V, Fe, Co) Nanocomposites: Facile Solid‐State Synthesis, Magnetic, Optical, and Electrochemical Properties. CRYSTAL RESEARCH AND TECHNOLOGY 2022. [DOI: 10.1002/crat.202200044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]

Wang P, Ding X, Zhe R, Zhu T, Qing C, Liu Y, Wang HE. Synchronous Defect and Interface Engineering of NiMoO₄ Nanowire Arrays for High-Performance Supercapacitors. NANOMATERIALS (BASEL, SWITZERLAND) 2022;12:1094. [PMID: 35407214 PMCID: PMC9000437 DOI: 10.3390/nano12071094] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 03/18/2022] [Accepted: 03/24/2022] [Indexed: 11/16/2022]

Abstract

Developing high-performance electrode materials is in high demand for the development of supercapacitors. Herein, defect and interface engineering has been simultaneously realized in NiMoO4 nanowire arrays (NWAs) using a simple sucrose coating followed by an annealing process. The resultant hierarchical oxygen-deficient NiMoO4@C NWAs (denoted as "NiMoO4-x@C") are grown directly on conductive ferronickel foam substrates. This composite affords direct electrical contact with the substrates and directional electron transport, as well as short ionic diffusion pathways. Furthermore, the coating of the amorphous carbon shell and the introduction of oxygen vacancies effectively enhance the electrical conductivity of NiMoO4. In addition, the coated carbon layer improves the structural stability of the NiMoO4 in the whole charging and discharging process, significantly enhancing the cycling stability of the electrode. Consequently, the NiMoO4-x@C electrode delivers a high areal capacitance of 2.24 F cm-2 (1720 F g-1) at a current density of 1 mA cm-2 and superior cycling stability of 84.5% retention after 6000 cycles at 20 mA cm-2. Furthermore, an asymmetric super-capacitor device (ASC) has been constructed with NiMoO4-x@C as the positive electrode and activated carbon (AC) as the negative electrode. The as-assembled ASC device shows excellent electrochemical performance with a high energy density of 51.6 W h kg-1 at a power density of 203.95 W kg-1. Moreover, the NiMoO4//AC ASC device manifests remarkable cyclability with 84.5% of capacitance retention over 6000 cycles. The results demonstrate that the NiMoO4-x@C composite is a promising material for electrochemical energy storage. This work can give new insights on the design and development of novel functional electrode materials via defect and interface engineering through simple yet effective chemical routes.

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Affiliation(s)

Pengcheng Wang Yunnan Key Laboratory of Optoelectronic Information Technology, College of Physics and Electronics Information, Yunnan Normal University, Kunming 650500, China; (P.W.); (X.D.); (R.Z.); (T.Z.); (Y.L.)
Xinying Ding Yunnan Key Laboratory of Optoelectronic Information Technology, College of Physics and Electronics Information, Yunnan Normal University, Kunming 650500, China; (P.W.); (X.D.); (R.Z.); (T.Z.); (Y.L.)
Rongjie Zhe Yunnan Key Laboratory of Optoelectronic Information Technology, College of Physics and Electronics Information, Yunnan Normal University, Kunming 650500, China; (P.W.); (X.D.); (R.Z.); (T.Z.); (Y.L.)
Ting Zhu Yunnan Key Laboratory of Optoelectronic Information Technology, College of Physics and Electronics Information, Yunnan Normal University, Kunming 650500, China; (P.W.); (X.D.); (R.Z.); (T.Z.); (Y.L.) Key Laboratory of Advanced Technique & Preparation for Renewable Energy Materials, Ministry of Education, Yunnan Normal University, Kunming 650500, China
Chen Qing Yunnan Key Laboratory of Optoelectronic Information Technology, College of Physics and Electronics Information, Yunnan Normal University, Kunming 650500, China; (P.W.); (X.D.); (R.Z.); (T.Z.); (Y.L.) Key Laboratory of Advanced Technique & Preparation for Renewable Energy Materials, Ministry of Education, Yunnan Normal University, Kunming 650500, China
Yingkai Liu Yunnan Key Laboratory of Optoelectronic Information Technology, College of Physics and Electronics Information, Yunnan Normal University, Kunming 650500, China; (P.W.); (X.D.); (R.Z.); (T.Z.); (Y.L.)
Hong-En Wang Yunnan Key Laboratory of Optoelectronic Information Technology, College of Physics and Electronics Information, Yunnan Normal University, Kunming 650500, China; (P.W.); (X.D.); (R.Z.); (T.Z.); (Y.L.) Key Laboratory of Advanced Technique & Preparation for Renewable Energy Materials, Ministry of Education, Yunnan Normal University, Kunming 650500, China

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Liang R, Du Y, Wu J, Li X, Liang T, Yuan J, Xiao P, Chen J. High performance g-C3N4 @NiMoO4/CoMoO4 electrode for supercapacitors. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2021.122845] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]

Biswas S, Sharma V, Mandal D, Chowdhury A, Chakravarty M, Priya S, Gowda CC, De P, Singh I, Chandra A. Hollow nanostructures of metal oxides as emerging electrode materials for high performance supercapacitors. CrystEngComm 2020. [DOI: 10.1039/c9ce01547g] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]