Hierarchical three-dimensional NiMoO4-anchored rGO/Ni foam as advanced electrode material with improved supercapacitor performance

Xu, Yuekui; Xuan, Haicheng; Gao, Jinhong; Tao, Liang; Han, Xiaokun; Yang, Jing; Zhang, Yongqing; Li, Hui; Han, Peide; Du, Youwei

doi:10.1007/s10853-018-2171-1

Cited by 38 publications

(10 citation statements)

References 60 publications

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“…Various nanostructured NiMoO 4 materials, such as nanosheets and nanorods arrays [ 20 ], nanotubes [ 21 ], hollow nanorods [ 22 ], mesoporous nanospheres [ 23 ], nanoparticles, and quantum dots [ 24 ], have been designed to boost the electrochemical performances of the NiMoO 4 electrodes via increased exposed surface for ion adsorption and insertion, shortened path distances for ion transport and diffusion, and improved electrolyte impregnation and permeation. Specifically, various low-dimensional NiMoO 4 nanostructures directly grown on conductive substrates (e.g., Ni/Cu foams [ 25 , 26 ], graphene [ 27 ], and carbon substrates [ 28 , 29 ]) are particularly preferred for directional electron transport with reduced charge carrier scattering at grain boundaries and easy integration into flexible devices with some specific applications.…”

Section: Introductionmentioning

confidence: 99%

Synchronous Defect and Interface Engineering of NiMoO4 Nanowire Arrays for High-Performance Supercapacitors

et al. 2022

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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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Section: Introductionmentioning

confidence: 99%

Synchronous Defect and Interface Engineering of NiMoO4 Nanowire Arrays for High-Performance Supercapacitors

et al. 2022

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“…Furthermore, the efficient packing of the CNTs in the foam led to high volumetric capacity, while maintaining interconnected porosity for diffusion of the electrolyte and complete wetting of the active material. Figure d shows that the areal capacity of the deterministic MoO 3 /CNT foam electrode architecture in this work was higher as compared to that of commercially prepared slurry electrodes, several other intercalation-type TMO electrode architectures, and other MoO 3 /CNT electrode architectures (inset) as a function of active material loading. ,,,,− This demonstrates that the deterministic electrode architecture presented here provides a scalable and reproducible pathway for high-mass loading, 3D electrode architectures.…”

Section: Resultsmentioning

confidence: 66%

Toward Deterministic 3D Energy Storage Electrode Architectures via Electrodeposition of Molybdenum Oxide onto CNT Foams

et al. 2021

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Three-dimensional (3D) deterministic design of electrodes could enable simultaneous high energy and power density for electrochemical energy storage devices. The goal of such electrode architectures is to provide adequate charge (electron and ion) transport pathways for high power, while maintaining high active material loading (>10 mg cm–2) for high areal and volumetric capacities. However, it remains a challenge to fabricate such electrodes with processes that are both scalable and reproducible. Toward this end, here, we demonstrate how the fabrication of such an electrode is made possible by combining tunable, free-standing, and aligned carbon nanotube (CNT) foams with aqueous electrodeposition of a model intercalation-type transition metal oxide, MoO3. Morphological characterization including X-ray microcomputed tomography indicates that the obtained composite is homogeneous. Electrodes with an active mass loading of up to 18 mg cm–2 reached near-theoretical Li-ion intercalation capacities within 1.7 h. The highest-mass loading electrodes also led to areal and volumetric capacities of 4.5 mA h cm–2 and 290 mA h cm–3, respectively, with 55% capacity retention for charge/discharge times of 10 min. Overall, this work demonstrates a scalable, deterministic 3D electrode design strategy using electrodeposition and free-standing, aligned CNT foams that lead to high areal and volumetric capacities and good rate performance due to well-distributed charge transport pathways.

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“…The d-spacing value at $0.35 nm matched well with the (100) plane of CdS, 59 whereas the lattice fringes with the d-spacing value of $0.303 nm corresponded to the (220) plane of NiMoO 4 . 60 Moreover, the element mapping images conrmed the presence of Cd, Ni, Mo, and S, which displayed a uniform distribution (Fig. 3c-g), corresponding to the homogenous NiMoO 4 /CdS nanocomposite.…”

Section: Resultsmentioning

confidence: 93%

Rational design of 1D NiMoO₄/0D CdS heterostructures for efficient photocatalytic hydrogen generation under visible light

El-Aal

Saleh

El‐Bery

2022

Sustainable Energy Fuels

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Hierarchical three-dimensional NiMoO4-anchored rGO/Ni foam as advanced electrode material with improved supercapacitor performance

Cited by 38 publications

References 60 publications

Synchronous Defect and Interface Engineering of NiMoO4 Nanowire Arrays for High-Performance Supercapacitors

Synchronous Defect and Interface Engineering of NiMoO4 Nanowire Arrays for High-Performance Supercapacitors

Toward Deterministic 3D Energy Storage Electrode Architectures via Electrodeposition of Molybdenum Oxide onto CNT Foams

Rational design of 1D NiMoO₄/0D CdS heterostructures for efficient photocatalytic hydrogen generation under visible light

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Hierarchical three-dimensional NiMoO4-anchored rGO/Ni foam as advanced electrode material with improved supercapacitor performance

Cited by 38 publications

References 60 publications

Synchronous Defect and Interface Engineering of NiMoO4 Nanowire Arrays for High-Performance Supercapacitors

Synchronous Defect and Interface Engineering of NiMoO4 Nanowire Arrays for High-Performance Supercapacitors

Toward Deterministic 3D Energy Storage Electrode Architectures via Electrodeposition of Molybdenum Oxide onto CNT Foams

Rational design of 1D NiMoO4/0D CdS heterostructures for efficient photocatalytic hydrogen generation under visible light

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Rational design of 1D NiMoO₄/0D CdS heterostructures for efficient photocatalytic hydrogen generation under visible light