Hierarchical 3-dimensional CoMoO<sub>4</sub> nanoflakes on a macroporous electrically conductive network with superior electrochemical performance

Li, Mai; Xu, Shaohui; Cherry, Christopher R.; Zhu, Yimei; Wu, Dajun; Zhang, Chi; Zhang, Xiaolin; Huang, Rong; Qi, Ruijuan; Wang, Lianwei; Chu, Paul K.

doi:10.1039/c5ta02081f

Cited by 61 publications

(25 citation statements)

References 46 publications

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“…1 , XRD patterns of samples are consistent with the standard pattern of CoMoO 4 (JCPDS No. 21-0868), and they are similar as reported in previous [ 6 , 8 , 32 , 33 ]. The diffraction peaks at 13.1°, 19.1°, 23.3°, 26.5°, 27.2°, 28.3°, 32.0°, 33.6°, 36.7°, 40.2°, 43.6°, 47.0°, 52.1°, 53.7°, 58.4°, and 64.5° are corresponding to reflections of the (001), ( 01), (021), (002), ( 12), ( 11), ( 31), ( 22), (400), (003), ( 41), (241), ( 04), ( 41), (024), and (243) planes, respectively.…”

Section: Resultssupporting

confidence: 89%

Hydrothermal Synthesized of CoMoO4 Microspheres as Excellent Electrode Material for Supercapacitor

Wang

et al. 2018

Nanoscale Res Lett

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The single-phase CoMoO4 was prepared via a facile hydrothermal method coupled with calcination treatment at 400 °C. The structures, morphologies, and electrochemical properties of samples with different hydrothermal reaction times were investigated. The microsphere structure, which consisted of nanoflakes, was observed in samples. The specific capacitances at 1 A g−1 are 151, 182, 243, 384, and 186 F g−1 for samples with the hydrothermal times of 1, 4, 8, 12, and 24 h, respectively. In addition, the sample with the hydrothermal time of 12 h shows a good rate capability, and there is 45% retention of initial capacitance when the current density increases from 1 to 8 A g−1. The high retain capacitances of samples show the fine long-cycle stability after 1000 charge-discharge cycles at current density of 8 A g−1. The results indicate that CoMoO4 samples could be a choice of excellent electrode materials for supercapacitor.

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Section: Resultssupporting

confidence: 89%

Hydrothermal Synthesized of CoMoO4 Microspheres as Excellent Electrode Material for Supercapacitor

Wang

et al. 2018

Nanoscale Res Lett

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“…The maximum capacities of Electrodes I and III are much lower and can only reach 309 mA h/g (371 µA h/cm 2 ) and 324 mA h/g (453 µA h/cm 2 ), respectively, over 25% and 21% lower than that of Electrode II. Notably, the specific capacity of our homogeneous architecture here is favorably comparable with those of previously reported nanostructures, including CoMoO 4 @Co(OH) 2 core-shell structures (265 mA h/cm 2 at 2 mA/cm 2 ) [46], as well as CoMoO 4 nanoflakes (32.40 mA h/g; 492.48 µAh/cm 2 ) [47], Ni–Mo–S nanosheets (312 mA h/g at 1 mA/cm 2 ) [48], and flower-like Mn–Co oxysulfide (136 mA h/g at 2 A/g) [49]. Detailed comparisons in electrochemical performances among these devices and our structure can be found in Table S1.…”

Section: Resultssupporting

confidence: 85%

Homogeneous Core/Shell NiMoO4@NiMoO4 and Activated Carbon for High Performance Asymmetric Supercapacitor

Dong

Hui

et al. 2019

Nanomaterials

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Here, we report the extraordinary electrochemical energy storage capability of NiMoO4@NiMoO4 homogeneous hierarchical nanosheet-on-nanowire arrays (SOWAs), synthesized on nickel substrate by a two-stage hydrothermal process. Comparatively speaking, the SOWAs electrode displays superior electrochemical performances over the pure NiMoO4 nanowire arrays. Such improvements can be ascribed to the characteristic homogeneous hierarchical structure, which not only effectively increases the active surface areas for fast charge transfer, but also reduces the electrode resistance significantly by eliminating the potential barrier at the nanowire/nanosheet junction, an issue usually seen in other reported heterogeneous architectures. We further evaluate the performances of the SOWAs by constructing an asymmetric hybrid supercapacitor (ASC) with the SOWAs and activated carbon (AC). The optimized ASC shows excellent electrochemical performances with 47.2 Wh/kg in energy density of 1.38 kW/kg at 0–1.2 V. Moreover, the specific capacity retention can be as high as 91.4% after 4000 cycles, illustrating the remarkable cycling stability of the NiMoO4@NiMoO4//AC ASC device. Our results show that this unique NiMoO4@NiMoO4 SOWA has great prospects for future energy storage applications.

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“…EIS of the device (Figure d) indicates that it shows a low equivalent series resistance of 0.64 Ω. The energy and power density of the device are calculated (Figure e), which delivers a maximum energy density of 135.6 at 2704.1 W kg –1 , revealing that the device possesses a better electrochemical performance than previous reports. − The cycling stability of the capacitor is also an important factor. The ZnCo 2 O 4 /CoMoO 4 //AC device in the first 8000 cycles shows almost no substantial decay, and it still maintains 95.1% of the initial capacitance (Figure f).…”

Section: Results and Discussionmentioning

confidence: 87%

Realizing Superior Electrochemical Performance of Asymmetric Capacitors through Tailoring Electrode Architectures

Liu

Dai

Zhao

et al. 2020

ACS Appl. Energy Mater.

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ZnCo 2 O 4 as an electrode material for supercapacitors has been extensively investigated owing to its unique structural characteristics and high capacitance. However, the conductivity still cannot reach the level of the industrialization. In order to solve this problem, it is an efficient strategy to develop composed electrode materials. Here, we prepare ZnCo 2 O 4 -based electrode materials through a facile hydrothermal route. The ZnCo 2 O 4 /CoMoO 4 sample possesses a specific capacitance of 903 C at 1 A g −1 . An assembled asymmetric capacitor presents an energy density of 135.6 Wh kg −1 at 2704.1 W kg −1 and capacity of 95.1% after 8000 cycles.

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Hierarchical 3-dimensional CoMoO₄ nanoflakes on a macroporous electrically conductive network with superior electrochemical performance

Abstract: The paper reports the novel CoMoO4 nanostructure that is fabricated on an ordered Macroporous Electrically conductive Network (MECN) as faradaic electrode.

Cited by 61 publications

References 46 publications

Hydrothermal Synthesized of CoMoO4 Microspheres as Excellent Electrode Material for Supercapacitor

Hydrothermal Synthesized of CoMoO4 Microspheres as Excellent Electrode Material for Supercapacitor

Homogeneous Core/Shell NiMoO4@NiMoO4 and Activated Carbon for High Performance Asymmetric Supercapacitor

Realizing Superior Electrochemical Performance of Asymmetric Capacitors through Tailoring Electrode Architectures

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Hierarchical 3-dimensional CoMoO4 nanoflakes on a macroporous electrically conductive network with superior electrochemical performance

Abstract: The paper reports the novel CoMoO4 nanostructure that is fabricated on an ordered Macroporous Electrically conductive Network (MECN) as faradaic electrode.

Cited by 61 publications

References 46 publications

Hydrothermal Synthesized of CoMoO4 Microspheres as Excellent Electrode Material for Supercapacitor

Hydrothermal Synthesized of CoMoO4 Microspheres as Excellent Electrode Material for Supercapacitor

Homogeneous Core/Shell NiMoO4@NiMoO4 and Activated Carbon for High Performance Asymmetric Supercapacitor

Realizing Superior Electrochemical Performance of Asymmetric Capacitors through Tailoring Electrode Architectures

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Product

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Hierarchical 3-dimensional CoMoO₄ nanoflakes on a macroporous electrically conductive network with superior electrochemical performance