Construction of CuO@Ni–Fe layered double hydroxide hierarchical core–shell nanorods arrays on copper foam for high-performance supercapacitors

Liu, Guolong; He, Xu; He, Dong; Cui, Bingyi; Zhu, Lida; Suo, Hui; Zhao, Chun

doi:10.1007/s10854-018-0479-x

Cited by 20 publications

(16 citation statements)

References 43 publications

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“…For example, He et al fabricated CuO@Ni–Fe-layered double hydroxide (LDH) nanorods arrays on Cu foam, by two-step in situ electrochemical processes. The CuO nanorods provide support for the subsequent electrodeposition of Ni–Fe LDH, and also participate in the electrochemical reaction as an active component, which reveals an improved specific capacitance of 2.682 F cm −2 , responding to the scan rates of 2 mV s −1 [ 6 ]. Yuksel et al designed a Ag nanowire@Ni(OH) 2 coaxial nanocomposite electrode.…”

Section: Introductionmentioning

confidence: 99%

In Situ Construction of ZnO/Ni2S3 Composite on Ni Foam by Combing Potentiostatic Deposition with Cyclic Voltammetric Electrodeposition

Geng

Wang

et al. 2021

Micromachines

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The ZnO/Ni2S3 composite has been designed and in situ synthesized on Ni foam substrate by two steps of electrodeposition. ZnO was achieved on Ni foam by a traditional potentiostatic deposition, followed by cyclic voltammetric (CV) electrodeposition, to generate Ni2S3, where the introduction of ZnO provides abundant active sites for the subsequent Ni2S3 electrodeposition. The amount of deposit during CV electrodeposition can be adjusted by setting the number of sweep segment and scan rate, and the electrochemical characteristics of the products can be readily optimized. The synergistic effect between the ZnO as backbones and the deposited Ni2S3 as the shell enhances the electrochemical properties of the sample significantly, including a highly specific capacitance of 2.19 F cm−2 at 2 mA cm−2, good coulombic efficiency of 98%, and long-term cyclic stability at 82.35% (4000 cycles).

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Section: Introductionmentioning

confidence: 99%

In Situ Construction of ZnO/Ni2S3 Composite on Ni Foam by Combing Potentiostatic Deposition with Cyclic Voltammetric Electrodeposition

Geng

Wang

et al. 2021

Micromachines

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“…For Cu(OH)2 electrode, a pair of redox peak at about 0.46 and 0.32 V can be observed, corresponding to the electrochemical transformation between Cu 2+ and Cu + as described by Equation (4) [26,27]: Figure 5b compares the GCD curves of the four electrodes mentioned above at 2 mA cm −2 . Obviously, the Cu(OH)2/Ni3S2 reveals the longest discharge time, illustrating the largest specific capacitance [22]. The capacitance characteristics of Cu(OH)2 and Cu foam are rather weak, while the electrochemical performance of Ni3S2 is significantly improved by the addition of Cu(OH)2.…”

Section: Resultsmentioning

confidence: 97%

“…The two separated small peaks at 952.56 and 932.82 eV are attributed to the exposed Cu substrate during the test [21]. The O 1s spectrum in Figure 4e can be divided into three peaks with binding energies at 530.90, 531.70 and 532.80 eV, corresponding to Cu(OH)2, OHand H2O molecule, respectively [22]. Figure 4f exhibits the S 2p spectrum, and the peaks centered at 162.30 and 161.40 eV belongs to S 2p1/2 and S 2p3/2, respectively, which can be assigned to S 2-.…”

Section: Resultsmentioning

confidence: 98%

Design and Construction of Cu(OH)2/Ni3S2 Composite Electrode on Cu Foam by Two-Step Electrodeposition

Shang

Wang

et al. 2022

Micromachines

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A Cu(OH)2/Ni3S2 composite has been designed and in situ constructed on Cu foam substrate by facile two-step electrodeposition. Cu(OH)2 is achieved on Cu foam by galvanostatic electrodeposition, and the subsequent coating of Ni3S2 is realized by cyclic voltammetric (CV) electrodeposition. The introduction of Cu(OH)2 provides skeleton support and a large specific surface area for the Ni3S2 electrodeposition. Benefiting from the selection of different components and preparation technology, the Cu(OH)2/Ni3S2 composite exhibits enhanced electrochemical properties with a high specific capacitance of 4.85 F cm−2 at 2 mA cm−2 and long-term cyclic stability at 80.84% (4000 cycles).

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“…This trend is also reflected in Figure 6b. In order to distinguish these results in detail, Figure 6c lists the Cs values of four samples at current densities of 2-60 mA cm −2 according to the formula calculation [29]. The conclusion is that the Cs value is in the order of S-20 > S-10 > S-1 under the same current density.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 6d presents the voltage drop curves at current densities of 2-60 mA cm −2 of the four samples and the corresponding derived average R ESR . The minimum R ESR is S-20 with 1.35 Ω cm −2 according to the formula used [29].…”

Section: Resultsmentioning

confidence: 99%

Hierarchical Design of Co(OH)2/Ni3S2 Heterostructure on Nickel Foam for Energy Storage

Shang

Chi

et al. 2022

Processes

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In this study, we rationally designed a facile stepwise route and successfully synthesized a Co(OH)2/Ni3S2 heterostructure supported on nickel foam (NF) as a binder-free electrode for energy storage. Galvanostatic deposition was first applied to produce uniform Co(OH)2 nanoflakes on NF. Then, Ni3S2 was applied to its surface by potentiostatic deposition to form a Co(OH)2/Ni3S2 heterostructure at room temperature. The added Co(OH)2 not only functions as a practical electrochemically active component but also provides support for the growth of Ni3S2, and the deposition amount of Ni3S2 is controlled by adjusting the electrodeposition duration of Ni3S2. Then, the electrochemical behaviors of the Co(OH)2/Ni3S2 composite can be optimized. A maximum areal specific capacitance (Cs) of 5.73 F cm−2 at 2 mA cm−2 was achieved, and the coulombic efficiency was as high as 94.14%. A capacitance retention of 84.38% was measured after 5000 charge–discharge cycles.

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Construction of CuO@Ni–Fe layered double hydroxide hierarchical core–shell nanorods arrays on copper foam for high-performance supercapacitors

Cited by 20 publications

References 43 publications

In Situ Construction of ZnO/Ni2S3 Composite on Ni Foam by Combing Potentiostatic Deposition with Cyclic Voltammetric Electrodeposition

In Situ Construction of ZnO/Ni2S3 Composite on Ni Foam by Combing Potentiostatic Deposition with Cyclic Voltammetric Electrodeposition

Design and Construction of Cu(OH)2/Ni3S2 Composite Electrode on Cu Foam by Two-Step Electrodeposition

Hierarchical Design of Co(OH)2/Ni3S2 Heterostructure on Nickel Foam for Energy Storage

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