Synthesis of CuO@CoNi LDH on Cu foam for high-performance supercapacitors

Chen, Feng; Chen, Chao; Hu, Qin; Xiang, Bin; Song, Tingting; Zou, Xuefeng; Li, Weining; Xiong, Bingxue; Deng, Mingsen

doi:10.1016/j.cej.2020.126145

Cited by 170 publications

(57 citation statements)

References 57 publications

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“…The Cu 2p 3/2 signal can also be fitted into two peaks at 934.5 and 932.3 eV, attributing to the Cu 2+ and Cu 0 , respectively. These results are consistent with previous reports [28,29] and can be assigned to CuO (for Cu 2+ ) and the Cu foam substrate (for Cu 0 ). In the O 1s spectrum (Figure 4b), the peak shows three contributions: the peak at 531.9 eV is typical for adsorbed water (H-O-H), the peak at 531.1 eV for a hydroxyl group (M-OH), and that at 530.3 eV for a metallic oxide (M-O) [37].…”

Section: Resultssupporting

confidence: 93%

“…Two distinct peaks appear in the Zn 2p spectrum (Figure 4c) at 1044.7 and 1021.6 eV, indicating the existence of Zn 2+ [38,39]. The high-resolution spectrum of Ni 2p (Figure 4d) shows three satellite peaks located at 880.1, 865.6, and 862.1 eV [40], following the two main peaks of Ni 2p 1/2 and Ni 2p 3/2 at 856.0 and 873.6 eV, respectively, which can be attributed to the state of Ni 2+ [28,29,41]. The two peaks at 875.3 and 857.8 eV belong to Ni 3+ , which might be caused by the partial surface oxidation and has been widely observed in transition metal-based compounds [42,43].…”

Section: Resultsmentioning

confidence: 93%

“…Among them, transition metal hydroxides have attracted a lot of attention on account of their battery-type feature, high theoretical capacity, facile preparation methods, and low cost. However, their intrinsically low conductivity deteriorates the cycling stability and high-rate performance [21,[27][28][29].…”

Section: Introductionmentioning

confidence: 99%

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Self-Supported Sheets-on-Wire CuO@Ni(OH)2/Zn(OH)2 Nanoarrays for High-Performance Flexible Quasi-Solid-State Supercapacitor

et al. 2021

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Transition metal hydroxides have attracted a lot of attention as the electrode materials for supercapacitors owing to their relatively high theoretical capacity, low cost, and facile preparation methods. However, their low intrinsic conductivity deteriorates their high-rate performance and cycling stability. Here, self-supported sheets-on-wire CuO@Ni(OH)2/Zn(OH)2 (CuO@NiZn) composite nanowire arrays were successfully grown on copper foam. The CuO nanowire backbone provided enhanced structural stability and a highly efficient electron-conducting pathway from the active hydroxide nanosheets to the current collector. The resulting CuO@NiZn as the battery-type electrode for supercapacitor application delivered a high capacity of 306.2 mAh g−1 at a current density of 0.8 A g−1 and a very stable capacity of 195.1 mAh g−1 at 4 A g−1 for 10,000 charge–discharge cycles. Furthermore, a quasi-solid-state hybrid supercapacitor (qss HSC) was assembled with active carbon, exhibiting 125.3 mAh g−1 at 0.8 A g−1 and a capacity of 41.6 mAh g−1 at 4 A g−1 for 5000 charge–discharge cycles. Furthermore, the qss HSC was able to deliver a high energy density of about 116.0 Wh kg−1. Even at the highest power density of 7.8 kW kg−1, an energy density of 20.5 Wh kg−1 could still be obtained. Finally, 14 red light-emitting diodes were lit up by a single qss HSC at different bending states, showing good potential for flexible energy storage applications.

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Section: Resultssupporting

confidence: 93%

Section: Resultsmentioning

confidence: 93%

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Self-Supported Sheets-on-Wire CuO@Ni(OH)2/Zn(OH)2 Nanoarrays for High-Performance Flexible Quasi-Solid-State Supercapacitor

et al. 2021

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“…The peaks at 855.87 and 873.46 eV correspond to the characteristic peaks of Ni(II) species in the electrocatalyst. 45 And the peaks assigned to satellite peaks are observed at 861.54 and 879.26 eV. The highresolution spectrum of O 1s uncovers the existence of three type of oxygen species, including metal-oxygen bonding at 530.70 eV, OHspecies at 531.39 eV, and absorbed oxygen at 532.38 eV.…”

Section: Resultsmentioning

confidence: 91%

Boosting hydrogen generation by anodic oxidation of iodide over Ni–Co(OH)₂ nanosheet arrays

Yao

Chen

et al. 2021

Nanoscale Adv.

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“…The mass-specific capacitance of each composite material can be calculated by following formula. 49 Cs ¼ i � �t m � �V where C s represents specific capacity (F/g), i represents current (A), �t represents discharge time (s), m represents weight of active material (g) and �V (�U) represents potential window. As listed in Table 2, when the polymerization voltage is 0.8 V, the specific capacitances of the composite with polymerization time of 10, 30 and 50 s are 234, 759 and 397 F/g, respectively.…”

Section: Electrochemical and Supercapacitive Properties Of Pani/gp Compositesmentioning

confidence: 99%

Electrochemical fabrication of polyaniline/graphene paper (PANI/GP) supercapacitor electrode materials on free-standing flexible graphene paper

Xiong

Wang

et al. 2021

High Performance Polymers

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Free-standing flexible supercapacitive electrodes have practical application for wearable energy storage devices. In this paper, graphene paper (GP), a flexible electrode substrate, was prepared by one-step reduction of graphene oxide (GO) using HI solution. GP can be used independently as a flexible electrode with specific capacitance of 227 F/g. In order to make up for the shortage of GP specific capacitance storage, polyaniline (PANI) with high specific capacitance and good electrical conductivity was selected to composite with GP by electrochemical polymerization approach. This method to fabricate electrode material by direct electrochemical polymerization avoids the use of conductive binder and organic solvent. Owing to the specific capacitance contribution of PANI and GP, the PANI/GP composites exhibit higher specific capacitance when the polymerization time is 30 s and the polymerization voltage is 0.8 V. At 1 A/g current density, the specific capacitance of composite is up to 759 F/g, which is 3.34 times of neat GP.

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Synthesis of CuO@CoNi LDH on Cu foam for high-performance supercapacitors

Cited by 170 publications

References 57 publications

Self-Supported Sheets-on-Wire CuO@Ni(OH)2/Zn(OH)2 Nanoarrays for High-Performance Flexible Quasi-Solid-State Supercapacitor

Self-Supported Sheets-on-Wire CuO@Ni(OH)2/Zn(OH)2 Nanoarrays for High-Performance Flexible Quasi-Solid-State Supercapacitor

Boosting hydrogen generation by anodic oxidation of iodide over Ni–Co(OH)₂ nanosheet arrays

Electrochemical fabrication of polyaniline/graphene paper (PANI/GP) supercapacitor electrode materials on free-standing flexible graphene paper

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Synthesis of CuO@CoNi LDH on Cu foam for high-performance supercapacitors

Cited by 170 publications

References 57 publications

Self-Supported Sheets-on-Wire CuO@Ni(OH)2/Zn(OH)2 Nanoarrays for High-Performance Flexible Quasi-Solid-State Supercapacitor

Self-Supported Sheets-on-Wire CuO@Ni(OH)2/Zn(OH)2 Nanoarrays for High-Performance Flexible Quasi-Solid-State Supercapacitor

Boosting hydrogen generation by anodic oxidation of iodide over Ni–Co(OH)2 nanosheet arrays

Electrochemical fabrication of polyaniline/graphene paper (PANI/GP) supercapacitor electrode materials on free-standing flexible graphene paper

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Product

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Boosting hydrogen generation by anodic oxidation of iodide over Ni–Co(OH)₂ nanosheet arrays