Intermediate phase α-β-Ni1-xCox(OH)2/carbon nanofiber hybrid material for high-performance nickel-zinc battery

Huang, Maozhan; Xu, Zhou; Hou, Cheng; Wang, Shiqin; Zhuang, Yan; Jia, Hai-Lang; Guan, Mingyun

doi:10.1016/j.electacta.2018.12.094

Cited by 22 publications

(11 citation statements)

References 24 publications

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“…The peak at 14.6° shows a smaller lattice spacing than the pure α-phase Ni(OH) 2 , and the peak at 20.0° is indexed as β-phase Ni(OH) 2 . Based on the XRD and IR results of Ni(OH) 2 , we assume that the structures of the Ni(OH) 2 NSs were a mixture of α/β-Ni(OH) 2 in which the structure is the interstratification of α-motifs in a matrix of β-Ni(OH) 2 . − IR spectra of the Co(OH) 2 and Ni(OH) 2 samples were measured to support the XRD structural study. The IR spectra show features of α-Co(OH) 2 and β-Ni(OH) 2 (Figure S5).…”

Section: Resultsmentioning

confidence: 96%

Nanoscale Composition Tuning of Cobalt–Nickel Hydroxide Nanosheets for Multiredox Pseudocapacitors

Cha

Kim

Jung

et al. 2020

ACS Appl. Energy Mater.

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We demonstrate enhanced electrochemical performance through nanoscale composition tuning of cobalt−nickel hydroxide (Co−Ni(OH) 2 ) films acting as the multiredox electrode for pseudocapacitors. Our electrodes were prepared using a two-step approach: bottom-up synthesis of Co−Ni(OH) 2 nanosheet (NS) colloidal solutions and their immobilization on a metal foam substrate. Co−Ni(OH) 2 NSs were synthesized by kinetically controlled vapor diffusion of ammonia into a metal precursor solution. A highly stable and chemically uniform Co−Ni(OH) 2 NS colloid was synthesized in a liquid medium (water and formamide) to afford Co 1−x Ni x OH 2 NSs (0 < x < 1). Horizontally aligned Co− Ni(OH) 2 NSs were directly immobilized on the nickel substrate using an electrophoretic deposition (EPD) method, and their electrochemical characteristics were investigated according to the Co/Ni molar ratio in the electrodes. Oxidation potentials of the electrode gradually shifted from 0.04 to 0.31 V with an increase in the Ni ratio of the metal hydroxide NS electrodes. Moreover, we successfully obtained the multiredox Co−Ni(OH) 2 electrode by nanoscale composition tuning of Co−Ni(OH) 2 NS films, which were accomplished by the preparation of a mixed colloidal solution. The nanoscale multicomposition Co−Ni(OH) 2 NS film showed comprehensive redox behavior from the relative contributions of each Co−Ni(OH) 2 having a different molar ratio of Co/Ni. Optimized multiredox Co− Ni(OH) 2 NS electrodes exhibited a high rate capability of 92% at 50 A g −1 and good cycle stability with 90.5% after 1,000 cycles. This method offers a route to produce highly stable pseudocapacitor electrodes with a wide operating window.

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Section: Resultsmentioning

confidence: 96%

Nanoscale Composition Tuning of Cobalt–Nickel Hydroxide Nanosheets for Multiredox Pseudocapacitors

Cha

Kim

Jung

et al. 2020

ACS Appl. Energy Mater.

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“…4b, the good symmetry and similar shapes represent highly reversibility and stability of the redox reaction occurred on the electrode when the scan rates increased from 10 to 50 mV s at a high current density of 20 A g −1 (Fig. 4d) ) [45]. The specific capacities of the electrodes were calculated from the CD curves (Fig.…”

Section: Resultsmentioning

confidence: 87%

Oxygen vacancies-rich cobalt-doped NiMoO4 nanosheets for high energy density and stable aqueous Ni-Zn battery

et al. 2020

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The enhancement of energy density and cycling stability is in urgent need for the widespread applications of aqueous rechargeable Ni-Zn batteries. Herein, a facile strategy has been employed to construct hierarchical Co-doped Ni-MoO 4 nanosheets as the cathode for high-performance Ni-Zn battery. Benefiting from the merits of substantially improved electrical conductivity and increased concentration of oxygen vacancies, the NiMoO 4 with 15% cobalt doping (denoted as CNMO-15) displays the best capacity of 361.4 mA h g −1 at a current density of 3 A g −1 and excellent cycle stability. Moreover, the assembled CNMO-15//Zn battery delivers a satisfactory specific capacity of 270.9 mA h g −1 at 2 A g −1 and a remarkable energy density of 474.1 W h kg −1 at 3.5 kW kg −1 , together with a maximum power density of 10.3 kW kg −1 achieved at 118.8 W h kg −1 . Noticeably, there is no capacity decay with a 119.8% retention observed after 5000 cycles, demonstrating its outstanding long lifespan. This work might provide valuable inspirations for the fabrication of high-performance Ni-Zn batteries with superior energy density and impressive stability.

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“…The cycle stability is a key parameter for the second battery . The galvanostatic cycles of NiZn batteries assembled by ZnO@Bi 2 O 3 with 3 wt % Bi 2 O 3 and bare ZnO as a negative electrode were tested according to the followed test parameters: voltage window between 1.0 and 2.15 V, charge and discharge densities of 20 mA·cm –2 , and a cut-off charge time of 3 min.…”

Section: Results and Discussionmentioning

confidence: 99%

“…The Ni 0.99 Co 0.01 (OH) 2 /CNFs were used to prepare the positive electrode. The preparation procedures of Ni 0.99 Co 0.01 (OH) 2 /CNFs and the positive electrode can be seen from our previous work (a brief description is provided in the Supporting Information . The NiZn battery is fabricated from the Ni 0.99 Co 0.01 (OH) 2 /CNFs electrode as a cathode, core–shell ZnO@Bi 2 O 3 composite as an anode, polyolefin membrane as a separator, and polyacrylic acid sodium gel electrolyte (6 mol L –1 KOH + 1 mol L –1 LiOH saturated with ZnO) used as an aluminum-plastic film package.…”

Section: Experimental Sectionmentioning

confidence: 99%

Solid-Phase Synthesis of ZnO@Bi₂O₃ Core–Shell Composites for Long-Life NiZn Batteries

Wang

Chen

Zhang

et al. 2022

ACS Sustainable Chem. Eng.

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In this work, core-shell ZnO@Bi 2 O 3 composites are fabricated by a solid-phase method. SEM, TEM, and element mapping images confirm the uniform distribution of Bi 2 O 3 film over the surface of ZnO particles. The formation mechanism is proposed. In addition, the electrochemical performance of core− shell ZnO@Bi 2 O 3 composites is measured with the help of CV and EIS, and the optimal reaction parameters are obtained. Furthermore, the optimized ZnO@Bi 2 O 3 with 3 wt % Bi 2 O 3 as anode materials is used for the NiZn battery, which has delivered a high energy density of 177.23 W h kg −1 and outstanding cycle stability up to 3400 cycles. The Bi 2 O 3 layer suppresses hydrogen evolution and effectively mitigates the migration of Zn(OH) 4 2− , dendrite formation, and passivation of zinc anode due to substance effect and as ion sieve. We propose that this is a facile and easy synthetic method that can be scaled and may provide guidance for the synthesis of other core−shell structures.

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Intermediate phase α-β-Ni1-xCox(OH)2/carbon nanofiber hybrid material for high-performance nickel-zinc battery

Cited by 22 publications

References 24 publications

Nanoscale Composition Tuning of Cobalt–Nickel Hydroxide Nanosheets for Multiredox Pseudocapacitors

Nanoscale Composition Tuning of Cobalt–Nickel Hydroxide Nanosheets for Multiredox Pseudocapacitors

Oxygen vacancies-rich cobalt-doped NiMoO4 nanosheets for high energy density and stable aqueous Ni-Zn battery

Solid-Phase Synthesis of ZnO@Bi₂O₃ Core–Shell Composites for Long-Life NiZn Batteries

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Intermediate phase α-β-Ni1-xCox(OH)2/carbon nanofiber hybrid material for high-performance nickel-zinc battery

Cited by 22 publications

References 24 publications

Nanoscale Composition Tuning of Cobalt–Nickel Hydroxide Nanosheets for Multiredox Pseudocapacitors

Nanoscale Composition Tuning of Cobalt–Nickel Hydroxide Nanosheets for Multiredox Pseudocapacitors

Oxygen vacancies-rich cobalt-doped NiMoO4 nanosheets for high energy density and stable aqueous Ni-Zn battery

Solid-Phase Synthesis of ZnO@Bi2O3 Core–Shell Composites for Long-Life NiZn Batteries

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Solid-Phase Synthesis of ZnO@Bi₂O₃ Core–Shell Composites for Long-Life NiZn Batteries