NH4F assisted and morphology-controlled fabrication of ZnCo2O4 nanostructures on Ni-foam for enhanced energy storage devices

Cheng, Lin; Xu, Min; Zhang, Qingsong; Li, Guochang; Chen, Jinxi; Lou, Yongbing

doi:10.1016/j.jallcom.2018.11.402

Cited by 71 publications

(37 citation statements)

References 61 publications

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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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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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“…The CV tests related to FeCo 2 O 4 MSs//AC ASC at a scan rate of 10 mV s –1 were conducted through various voltage ranges from 0–0.8 to 0–1.7 V. As shown in Figure S3a, the CV curve over a voltage of 0–1.7 V presented a prominent bulge at high potential, which could be attributed to the electrolysis of water in the KOH electrolyte solution . Whereas the curves within 0–1.6 V voltage showed well-defined redox peaks without obvious polarization, the voltage with 0–1.6 V was suitable to electrochemical tests to investigate the electrochemical behaviors of ASC.…”

Section: Resultsmentioning

confidence: 99%

Simple Preparation of Porous FeCo₂O₄ Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Sun

et al. 2020

ACS Appl. Energy Mater.

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Transition metal oxides (TMOs) can serve as advanced electrode materials and have attracted extensive attention in the past decade. Herein, porous FeCo 2 O 4 microspheres (FeCo 2 O 4 MSs) and FeCo 2 O 4 nanosheets (FeCo 2 O 4 NSs) have been successfully synthesized in different solvent systems, accompanied by a corresponding annealing treatment of precursors. The FeCo 2 O 4MSs and NSs possessed a mesoporous structure, and the BET surface areas reached 40.9 and 38.5 m 2 g −1 , respectively. The electrochemical studies were performed in a KOH aqueous electrolyte, and such FeCo 2 O 4 MSs delivered 231.5 C g −1 at 1 A g −1 and exhibited a good long-term cycling performance during 5000 cycles with 71.3% capacity retention. In contrast, the FeCo 2 O 4 NSs delivered a higher capacity of 339.0 C g −1 at 1 A g −1 and exhibited a better rate capability with 73% capacity retention at 13 A g −1 . Furthermore, the assembled FeCo 2 O 4 NSs//AC ASC could preserve 100.5% specific capacity after 5000 cycles and exhibited a high energy density of 37.1 W h kg −1 at 928.0 W kg −1 , while the FeCo 2 O 4 MSs//AC ASC possessed a relatively low energy density with 26.2 W h kg −1 at 965.5 W kg −1 . The outstanding electrochemical behavior of FeCo 2 O 4 NSs and MSs makes them promising electrode materials in electrochemical storage devices. Additionally, this current synthetic strategy possesses some advantages such as simple handling, low maintenance cost, and environmental friendliness; thus, it can be employed for synthesizing other TMOs with superior electrochemical properties.

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“…For instance, by controlling the ratio of NH 4 F and Co 2? , ZnCo 2 O 4 with nanosheets, nanoblocks, nanowires, and nanofeathers have been grown on Ni foam [23]. The NH 4 F-tuned Fe 2 O 3 microspheres have been reported and the sensing performances to acetone was studied [24].…”

Section: Introductionmentioning

confidence: 99%

Hierarchical flower-like NiFe2O4 with core–shell structure for excellent toluene detection

et al. 2020

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The extensive use of toluene stimulates the effective detection by sensitive gas sensors based on unique materials. Here, hierarchical flower-like NiFe 2 O 4 with core-shell architecture was synthesized by a facile hydrothermal method in the presence of urea and NH 4 F. The controllable experiments indicated that the burr spheres and football-like samples were produced with individual urea or NH 4 F. The flower-like NiFe 2 O 4 sensor exhibited outstanding sensitivity of 19.95 to 100 9 10 -6 toluene with low detection limit (1 9 10 -6 ). Furthermore, the sensor showed superior sensing selectivity and longterm stability to toluene. The excellent sensing properties could largely arise from a combination of high surface area, numerous active sites, porous structures, and the native catalytic characteristics of NiFe 2 O 4 to facilitate toluene molecules adsorption, diffusion, and reaction.

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NH4F assisted and morphology-controlled fabrication of ZnCo2O4 nanostructures on Ni-foam for enhanced energy storage devices

Cited by 71 publications

References 61 publications

Realizing Superior Electrochemical Performance of Asymmetric Capacitors through Tailoring Electrode Architectures

Realizing Superior Electrochemical Performance of Asymmetric Capacitors through Tailoring Electrode Architectures

Simple Preparation of Porous FeCo₂O₄ Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Hierarchical flower-like NiFe2O4 with core–shell structure for excellent toluene detection

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NH4F assisted and morphology-controlled fabrication of ZnCo2O4 nanostructures on Ni-foam for enhanced energy storage devices

Cited by 71 publications

References 61 publications

Realizing Superior Electrochemical Performance of Asymmetric Capacitors through Tailoring Electrode Architectures

Realizing Superior Electrochemical Performance of Asymmetric Capacitors through Tailoring Electrode Architectures

Simple Preparation of Porous FeCo2O4 Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors

Hierarchical flower-like NiFe2O4 with core–shell structure for excellent toluene detection

Contact Info

Product

Resources

About

Simple Preparation of Porous FeCo₂O₄ Microspheres and Nanosheets for Advanced Asymmetric Supercapacitors