Facile synthesis of mesoporous NixCo9−xS8 hollow spheres for high-performance supercapacitors and aqueous Ni/Co–Zn batteries

Zhang, Daojun; Zhang, Jingchao; Li, Jiaqi; Li, Chengxiang; Li, Yuting; Liu, Yingying; Zhang, Renchun

doi:10.1039/d2ra03022e

Cited by 4 publications

(2 citation statements)

References 63 publications

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“…It can be seen in Figure c that the characteristic Co 2p peak energies of 780.8 and 796.4 eV are consistent with the existence of Co 2+ . Furthermore, the featured peaks concentrated in 778.2 and 793.3 eV, implying the existence of Co 3+ . According to Figure d, with regards to the S 2p spectrum, two main peaks can be seen, in addition to a single shakeup satellite (167.7 eV).…”

Section: Resultssupporting

confidence: 55%

“…29 Furthermore, the featured peaks concentrated in 778.2 and 793.3 eV, implying the existence of Co 3+ . 30 According to Figure 5d, with regards to the S 2p spectrum, two main peaks can be seen, in addition to a single shakeup satellite (167.7 eV). The results of the In addition, the stability and durability of the as-synthesized p-Ni x Co 9−x S 8 nanosheets were tested in alkaline conditions.…”

Section: Resultsmentioning

confidence: 92%

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Efficient Hydrogen Evolution Catalysts Based on Hierarchical Flowerlike Ni_xCo_9–xS₈ Nanosheets

et al. 2023

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In terms of the need for a low-carbon economy and alleviating the need for energy security, hydrogen (H 2 ) plays a key role in promoting a sustainable economy because it is clean and efficient. The bottleneck of the hydrogen evolution reaction (HER) can be overcome by developing high-efficiency electrocatalysts. Using a simple solvothermal method, p-Ni x Co 9−x S 8 with polyvinylpyrrolidone (PVP) compounds are successfully prepared with synergistic effects between bimetallic sulfides. The resulting p-Ni x Co 9−x S 8 catalyst shows a hierarchical flowerlike nanosheet shape based on physical representations. An ultrathin and porous nanosheet surface facilitates rapid electrolyte injection and provides abundant active sites for H + adsorption, thus giving p-Ni x Co 9−x S 8 nanosheets outstanding HER performance. Furthermore, the synergistic effect of a bimetallic electrocatalyst is helpful to improve HER activity. In comparison to Ni x Co 9−x S 8 nanosheets without PVP, individual Co 9 S 8 particles, and individual Ni 9 S 8 nanosheets, p-Ni x Co 9−x S 8 nanosheets have a lower overpotential (137 mV to 10 mA cm −2 ), Tafel slope (109 mV dec −1 ), and 95.7% retention of current after 1000 cycles in the HER process.

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Section: Resultssupporting

confidence: 55%

Section: Resultsmentioning

confidence: 92%

Efficient Hydrogen Evolution Catalysts Based on Hierarchical Flowerlike Ni_xCo_9–xS₈ Nanosheets

et al. 2023

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3D nanocubes NiCo-PBA sulfide for high-performance supercapacitors

Zhu,

Xu,

Sun

et al. 2024

Electrochimica Acta

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Nanostructured binary transition-metal-sulfides and nanocomposites as high-performance electrodes for hybrid supercapacitors

Sun,

Ren,

Gan

et al. 2024

Applied Physics Reviews

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Supercapacitors (SCs) are attractive as promising energy storage devices because of their distinctive attributes, such as high power density, good current charge/discharge ability, excellent cyclic stability, reasonable safety, and low cost. Electrode materials play key roles in achieving excellent performance of these SCs. Among them, binary transition metal sulfides (BTMSs) have received significant attention, attributed to their high conductivity, abundant active sites, and excellent electrochemical properties. This topic review aims to summarize recent advances in principles, design, and evaluation of the electrochemical performance for nanostructured BTMSs (including nickel–cobalt sulfides, zinc–cobalt sulfides, and copper–cobalt sulfides.) and their nanocomposites (including those carbon nanomaterials, transition metal oxides, binary transition metal oxides, transition metal sulfides, and polymers). Nanostructuring of these BTMSs and nanocomposites as well as their effects on the performance were discussed, including nanoparticles, nanospheres, nanosheets, nanowires, nanorods, nanotubes, nanoarrays, and hierarchitectured nanostructures. Their electrochemical performance has further been reviewed including specific capacitance, conductivity, rate capability, and cycling stability. In addition, the performance of hybrid supercapacitors (HSCs) assembled using the nanostructured BTMSs as the cathodes also have been summarized and compared. Finally, challenges and further prospects in the HSCs-based BTMS electrodes are presented.

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Facile synthesis of mesoporous Ni_xCo_9−xS₈ hollow spheres for high-performance supercapacitors and aqueous Ni/Co–Zn batteries

Abstract: Mesoporous NiCo9S8-0.6 hollow spheres as a high-performance supercapacitor and aqueous Ni/Co–Zn battery.

Cited by 4 publications

References 63 publications

Efficient Hydrogen Evolution Catalysts Based on Hierarchical Flowerlike Ni_xCo_9–xS₈ Nanosheets

Efficient Hydrogen Evolution Catalysts Based on Hierarchical Flowerlike Ni_xCo_9–xS₈ Nanosheets

3D nanocubes NiCo-PBA sulfide for high-performance supercapacitors

Nanostructured binary transition-metal-sulfides and nanocomposites as high-performance electrodes for hybrid supercapacitors

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Facile synthesis of mesoporous NixCo9−xS8 hollow spheres for high-performance supercapacitors and aqueous Ni/Co–Zn batteries

Abstract: Mesoporous NiCo9S8-0.6 hollow spheres as a high-performance supercapacitor and aqueous Ni/Co–Zn battery.

Cited by 4 publications

References 63 publications

Efficient Hydrogen Evolution Catalysts Based on Hierarchical Flowerlike NixCo9–xS8 Nanosheets

Efficient Hydrogen Evolution Catalysts Based on Hierarchical Flowerlike NixCo9–xS8 Nanosheets

3D nanocubes NiCo-PBA sulfide for high-performance supercapacitors

Nanostructured binary transition-metal-sulfides and nanocomposites as high-performance electrodes for hybrid supercapacitors

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Product

Resources

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Facile synthesis of mesoporous Ni_xCo_9−xS₈ hollow spheres for high-performance supercapacitors and aqueous Ni/Co–Zn batteries

Efficient Hydrogen Evolution Catalysts Based on Hierarchical Flowerlike Ni_xCo_9–xS₈ Nanosheets

Efficient Hydrogen Evolution Catalysts Based on Hierarchical Flowerlike Ni_xCo_9–xS₈ Nanosheets