Manganese-doped nickel molybdate nanostructures for high-performance asymmetric supercapacitors

Li, Yan; Zhang, Shengming; Ma, Mingyu; Mu, Xuemei; Zhang, Yaxiong; Du, Jingwei; Hu, Qiang; Huang, Baoyu; Hua, Xiaohui; Le, Guo; Xie, Erqing; Zhang, Zhenxing

doi:10.1016/j.cej.2019.04.167

Cited by 67 publications

(29 citation statements)

References 41 publications

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“…To overcome the poor electronic conductivity of pristine NiMoO 4 , various NiMoO 4 /carbon composites have been synthesized by hybridizing NiMoO 4 nanostructures with graphene [ 30 , 31 ], carbon nanotubes [ 32 ], conducting polymers [ 33 ], and porous carbon architectures [ 34 , 35 ] Alternatively, intentional doping of NiMoO 4 with several kinds of heteroatoms such as Mn [ 36 , 37 ], P [ 38 ], Zn [ 39 ], Ce [ 40 ], or the creation of oxygen vacancies [ 14 , 41 , 42 , 43 ] in the lattice have recently been reported. In addition, NiMoO 4 has also been coupled with other metal oxides [ 44 , 45 , 46 , 47 , 48 , 49 ] or sulfides [ 50 , 51 , 52 ] to form heterostructure electrodes for supercapacitors with improved electrochemical performances.…”

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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“…The Ragone plot of the energy and the power density of the ASC cell is shown in Figure 7e. The energy density of the NiMoO 4 @Co 3 O 4 /CA//AC ASC increases from 16.3 to NMSAs//AC [47], Co 3 O 4 @NiMoO 4 //AC [48], MNMO//AC [49], CNM-1//AC [50]. The inset in Figure 7e and Figure S6 in Supporting Information File 1 show a green LED powered by the assembled ASC device.…”

Section: Image Of Nimoo 4 Is Shown Inmentioning

confidence: 96%

High-performance asymmetric supercapacitor made of NiMoO₄ nanorods@Co₃O₄ on a cellulose-based carbon aerogel

Wang

Zhang

Liu

et al. 2020

Beilstein J. Nanotechnol.

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In this study, a new nanoporous material comprising NiMoO4 nanorods and Co3O4 nanoparticles derived from ZIF-67 supported by a cellulose-based carbon aerogel (CA) has been successfully synthesized using a two-step hydrothermal method. Due to its chemical composition, the large specific surface and the hierarchical porous structure, the NiMoO4@Co3O4/CA ternary composite yields electrodes with an enhanced specific capacitance of 436.9 C/g at a current density of 0.5 A/g and an excellent rate capability of 70.7% capacitance retention at 5.0 A/g. Moreover, an advanced asymmetric supercapacitor (ASC) is assembled using the NiMoO4@Co3O4/CA ternary composite as the positive electrode and activated carbon as the negative electrode. The ASC device exhibits a large capacitance of 125.4 F/g at 0.5 A/g, a maximum energy density of 34.1 Wh/kg at a power density of 208.8 W/kg as well as a good cyclic stability (84% after 2000 cycles), indicating its wide applicability in energy storage. Finally, our results provide a general approach to the construction of CA and MOF-based composite materials with hierarchical porous structure for potential applications in supercapacitors.

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“…Metal cation dopants can influence the bandgap, optimize crystal structures, increase structural stability, and adjust charge redistribution within the crystal structure, which enhances the redox reaction kinetics and capacity of electrode materials. [ 270 ] Many cation‐doped TMCs like Mn‐doped NiMoO 4 , [ 119 ] Au‐doped MnO 2 , [ 271 ] Fe‐doped MnO 2 , [ 272 ] Mo‐doped WO 3 , [ 40 ] Na‐doped MnO 2 nanosheets, [ 41 ] and La‐doped V 2 O 5 · n H 2 O [ 273 ] have been prepared as flexible electrodes for SCs. Different metal dopants affect the electronic property of materials to varying degrees.…”

Section: Strategies For Improving Electrochemical Activity Of Tmcsmentioning

confidence: 99%

Recent Development of Flexible and Stretchable Supercapacitors Using Transition Metal Compounds as Electrode Materials

Lyu

Antink

Kim

et al. 2021

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Flexible and stretchable supercapacitors (FS‐SCs) are promising energy storage devices for wearable electronics due to their versatile flexibility/stretchability, long cycle life, high power density, and safety. Transition metal compounds (TMCs) can deliver a high capacitance and energy density when applied as pseudocapacitive or battery‐like electrode materials owing to their large theoretical capacitance and faradaic charge‐storage mechanism. The recent development of TMCs (metal oxides/hydroxides, phosphides, sulfides, nitrides, and selenides) as electrode materials for FS‐SCs are discussed here. First, fundamental energy‐storage mechanisms of distinct TMCs, various flexible and stretchable substrates, and electrolytes for FS‐SCs are presented. Then, the electrochemical performance and features of TMC‐based electrodes for FS‐SCs are categorically analyzed. The gravimetric, areal, and volumetric energy density of SC using TMC electrodes are summarized in Ragone plots. More importantly, several recent design strategies for achieving high‐performance TMC‐based electrodes are highlighted, including material composition, current collector design, nanostructure design, doping/intercalation, defect engineering, phase control, valence tuning, and surface coating. Integrated systems that combine wearable electronics with FS‐SCs are introduced. Finally, a summary and outlook on TMCs as electrodes for FS‐SCs are provided.

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Manganese-doped nickel molybdate nanostructures for high-performance asymmetric supercapacitors

Cited by 67 publications

References 41 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

High-performance asymmetric supercapacitor made of NiMoO₄ nanorods@Co₃O₄ on a cellulose-based carbon aerogel

Recent Development of Flexible and Stretchable Supercapacitors Using Transition Metal Compounds as Electrode Materials

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Manganese-doped nickel molybdate nanostructures for high-performance asymmetric supercapacitors

Cited by 67 publications

References 41 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

High-performance asymmetric supercapacitor made of NiMoO4 nanorods@Co3O4 on a cellulose-based carbon aerogel

Recent Development of Flexible and Stretchable Supercapacitors Using Transition Metal Compounds as Electrode Materials

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High-performance asymmetric supercapacitor made of NiMoO₄ nanorods@Co₃O₄ on a cellulose-based carbon aerogel