A novel hierarchical core-shell structure of NiCo2O4@NiCo-LDH nanoarrays for higher-performance flexible all-solid-state supercapacitor electrode materials

Li, Shengjuan; Luo, Yi; Wu, Mingxia; Xue, Yuhua; Yang, Jing; Li, Lei

doi:10.1016/j.jallcom.2022.165986

Cited by 60 publications

(18 citation statements)

References 53 publications

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“…The average pore sizes of NiCo-LDH and NiCo-LDH/S-100 composites were 18.49 and 21.14 nm, respectively. The diameter of OH – is smaller than the pore diameter of the mesopore, allowing OH – to move quickly through the mesopore channel before reaching the electrode material . Moreover, the SSAs of NiCo-LDH and NiCo-LDH/S-100 are 46.27 m 2 /g and 70.88 m 2 /g, respectively, and the pore volumes are 0.26 cm 3 /g and 0.31 cm 3 /g, respectively.…”

Section: Resultsmentioning

confidence: 99%

Composites of NiCo Layered Double Hydroxide Nanosheets and Co₃S₄ Nanoparticles for Asymmetric Supercapacitors

Yang

Song

Chen

2023

ACS Appl. Nano Mater.

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Transition metal layered double hydroxides (LDHs) with high theoretical specific capacity and abundant redox active centers are considered as ideal cathode materials for asymmetric supercapacitors, but limited specific surface area (SSA) and low conductivity hinder its electrochemical performance. Herein, layered NiCo-LDH nanosheets were synthesized by simple one-step ion exchange and co-precipitation method at room temperature using Co-ZIF-L as the metal precursor. Subsequently, Co3S4 nanoparticles were grown on NiCo-LDH nanosheets by controlling the amount of sulfur addition, thus constructing NiCo-LDH/Co3S4 composites with heterogeneous structures. The large SSA provided more active centers for the pseudocapacitance reaction, resulting in NiCo-LDH/Co3S4 obtaining high specific capacity and good rate capability (728.1 C g–1 at 1 A g–1 and 452.9 C g–1 at 20 A g–1). In addition, the assembled asymmetric supercapacitor (NiCo-LDH/S-100//AC) achieved a superior energy density (35.21 Wh g–1 at 749.98 W kg–1), showing considerable potential for practical applications.

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Section: Resultsmentioning

confidence: 99%

Composites of NiCo Layered Double Hydroxide Nanosheets and Co₃S₄ Nanoparticles for Asymmetric Supercapacitors

Yang

Song

Chen

2023

ACS Appl. Nano Mater.

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“…7d). 34,60–64 As shown in Fig. 7e, the obtained device exhibited a good cycling performance, which could maintain 90% of its initial capacity after 10 000 cycles at a current density of 10 A g −1 .…”

Section: Resultsmentioning

confidence: 82%

Flexible aqueous supercapacitors with excellent cycling performance and high-energy density based on mesocrystalline NiCo-LDHs

Xie

Song

Fan

et al. 2023

Phys. Chem. Chem. Phys.

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“…While increasing to 2.6 kW kg

, its energy density still reaches 51.6 Wh kg

. In this paper, the energy density and power density of related devices are compared and analyzed, as follows: the energy density of NiCo-LDHs-rGO// AC 47.1 Wh kg

at 399.9 W kg

[ 36 ], Ni-Co LDH-G//AC at 40.6 Wh kg

at 400 W kg

[ 37 ], NCNRs-NCNSs// AC at 22.8 Wh kg

at 374.5 W kg

[ 38 ], and NiCo

/NiCo-LDH// AC at 49 Wh kg

at 750 W kg

[ 39 ]. The NCAO//AC asymmetric supercapacitor with a unique structure was found to exhibit high energy density and power density.…”

Section: Resultsmentioning

confidence: 99%

Alkali-Etched NiCoAl-LDH with Improved Electrochemical Performance for Asymmetric Supercapacitors

et al. 2023

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Hydrotalcite, first found in natural ores, has important applications in supercapacitors. NiCoAl-LDH, as a hydrotalcite-like compound with good crystallinity, is commonly synthesized by a hydrothermal method. Al3+ plays an important role in the crystallization of hydrotalcite and can provide stable trivalent cations, which is conducive to the formation of hydrotalcite. However, aluminum and its hydroxides are unstable in a strong alkaline electrolyte; therefore, a secondary alkali treatment is proposed in this work to produce cation vacancies. The hydrophilicity of the NiCoAl-OH surface with cation vacancy has been greatly improved, which is conducive to the wetting and infiltration of electrolyte in water-based supercapacitors. At the same time, cation vacancies generate a large number of defects as active sites for energy storage. As a result, the specific capacity of the NiCoAl-OH electrode after 10,000 cycles can be maintained at 94.1%, which is much better than the NiCoAl-LDH material of 74%.

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A novel hierarchical core-shell structure of NiCo2O4@NiCo-LDH nanoarrays for higher-performance flexible all-solid-state supercapacitor electrode materials

Cited by 60 publications

References 53 publications

Composites of NiCo Layered Double Hydroxide Nanosheets and Co₃S₄ Nanoparticles for Asymmetric Supercapacitors

Composites of NiCo Layered Double Hydroxide Nanosheets and Co₃S₄ Nanoparticles for Asymmetric Supercapacitors

Flexible aqueous supercapacitors with excellent cycling performance and high-energy density based on mesocrystalline NiCo-LDHs

Alkali-Etched NiCoAl-LDH with Improved Electrochemical Performance for Asymmetric Supercapacitors

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A novel hierarchical core-shell structure of NiCo2O4@NiCo-LDH nanoarrays for higher-performance flexible all-solid-state supercapacitor electrode materials

Cited by 60 publications

References 53 publications

Composites of NiCo Layered Double Hydroxide Nanosheets and Co3S4 Nanoparticles for Asymmetric Supercapacitors

Composites of NiCo Layered Double Hydroxide Nanosheets and Co3S4 Nanoparticles for Asymmetric Supercapacitors

Flexible aqueous supercapacitors with excellent cycling performance and high-energy density based on mesocrystalline NiCo-LDHs

Alkali-Etched NiCoAl-LDH with Improved Electrochemical Performance for Asymmetric Supercapacitors

Contact Info

Product

Resources

About

Composites of NiCo Layered Double Hydroxide Nanosheets and Co₃S₄ Nanoparticles for Asymmetric Supercapacitors

Composites of NiCo Layered Double Hydroxide Nanosheets and Co₃S₄ Nanoparticles for Asymmetric Supercapacitors