Nickel-cobalt (oxy)hydroxide battery-type supercapacitor electrode with high mass loading

Gao, Mingyuan; Li, Yating; Yang, Jinhu; Liu, Yuexin; Liu, Ying; Zhang, Xiaoxiao; Wu, Shuanghao; Cai, Kefeng

doi:10.1016/j.cej.2021.132423

Cited by 77 publications

(34 citation statements)

References 81 publications

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“…The performance including the cycle voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS) of the three different fiber electrodes was evaluated by using a three-electrode system in 6 M KOH aqueous solution. To ensure the stability of performance, the fibers were activated with CV before the testing, which can be referred to in our previous work . As the CV curves show in Figure a, obvious redox peaks demonstrate typical battery-type properties of all the NCLDH@rGOFs.…”

Section: Resultsmentioning

confidence: 99%

“…This can be ascribed to the synergistic effect between bimetallic cations in LDH materials (such as Ni 2+ , Co 2+ , Fe 3+ , Mn 2+ , etc.) and the inherited large specific surface area from ZIF and its 2D layered nanosheet structure, which can ensure sufficient contact between electrode materials and electrolytes to expose abundant electrochemical active sites. , However, due to the relatively low conductivity of LDH materials, they are usually combined with conductive materials or grown in situ on conductive substrates. , …”

Section: Introductionmentioning

confidence: 99%

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High-Energy-Density Asymmetric Supercapacitor Based on a Nickel Cobalt Double Hydroxide/Reduced-Graphene-Oxide Fiber Electrode

Liu

Gao

et al. 2022

ACS Appl. Energy Mater.

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With high electrical conductivity, good mechanical strength, and excellent multidimensional flexibility, graphene fibers are more suitable for wearable devices than other flexible materials. However, challenges still exist in increasing their energy density. Here, we overcome this disadvantage by developing a fibrous supercapacitor loaded with battery-type active material. First, reduced-graphene-oxide fibers (rGOFs) with high conductivity and high toughness are fabricated from flake graphite by a series of redox reactions and wet-spinning processes. Second, Co-based zeolite imidazole framework (Co-ZIF) nanosheets are grown in situ on the surfaces of the rGOFs at room temperature and then converted into nickel cobalt layered double hydroxide (NCLDH) nanosheets by an etching codeposition method. The as-prepared NCLDH@rGOFs with a unique one-dimensional cladding structure exhibit an outstanding area specific capacitance of 2020 mF cm −2 at 5 mA cm −2 in a three-electrode system. When the NCLDH@ rGOFs and FeOOH@rGOFs are assembled into a flexible asymmetric supercapacitor (NF-FASC), the NF-FASC shows high area specific capacitance (351.6 mF cm −2 ), high energy density (max. 117.3 μWh cm −2 ), excellent power density (max. 34 000 μW cm −2 ), and acceptable cycle stability (75.5% capacitance retention after 5000 cycles).

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High-Energy-Density Asymmetric Supercapacitor Based on a Nickel Cobalt Double Hydroxide/Reduced-Graphene-Oxide Fiber Electrode

Liu

Gao

et al. 2022

ACS Appl. Energy Mater.

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“…56,57 Also, this band might correspond to the O–O vibration in the oxyhydroxide structure, which usually appears at 1100 cm −1 . 58 The adsorption bands located between 1000 and 400 cm −1 are associated with the M–O or M–OH vibrations. 35,59…”

Section: Resultsmentioning

confidence: 99%

“…56,57 Also, this band might correspond to the O-O vibration in the oxyhydroxide structure, which usually appears at 1100 cm À1 . 58 The adsorption bands located between 1000 and 400 cm À1 are associated with the M-O or M-OH vibrations. 35,59 X-ray photoelectron spectroscopy (XPS) is employed to get more details on the surface composition and electronic states of elements in the as-prepared SMVS ternary metal oxyhydroxide composite.…”

Section: Fabrication Of Asymmetric Supercapacitor Devicesmentioning

confidence: 99%

Binder-free Mn–V–Sn oxyhydroxide decorated with metallic Sn as an earth-abundant supercapattery electrode for intensified energy storage

Allam

Ghanem

Taha

et al. 2022

Sustainable Energy Fuels

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“…Developing high mass loading electrodes is a widely recognized approach to enhance the total energy density and offset the negative contribution of inactive materials. [6][7][8][9][10] Nevertheless, increasing mass loading over the practical level (>10 mg cm −2 ) generally results in rapid fading of the specific capacitance and mechanical stability of electrodes because of greatly worsened electron/ion transport kinetics caused by enlarged electrical resistance, reduced accessible surface area, poor electrolyte wetting and blocked ion transport channels. [11,12] Therefore, the trade-off between the affinity interface (super-hydrophilic property) greatly benefit ion migration (Figure 1c).…”

Section: Introductionmentioning

confidence: 99%

Interface Engineering on Cellulose‐Based Flexible Electrode Enables High Mass Loading Wearable Supercapacitor with Ultrahigh Capacitance and Energy Density

Chen

Ling

Huang

et al. 2021

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For practical energy storage devices, a bottleneck is to retain decent integrated performances while increasing the mass loading of active materials to the commercial level, which highlights an urgent need for novel electrode structure design strategies. Here, an active nitrogen‐doped carbon interface with “high conductivity, high porosity, and high electrolyte affinity” on a flexible cellulose electrode surface is engineered to accommodate 1D active materials. The high conductivity of interface favors fast electron transport, while its high porosity and high electrolyte affinity properties benefit ion migration. As a result, the flexible anode accommodated by carbon nanotubes achieves an ultrahigh capacitance of 9501 mF cm−2 (315.6 F g−1) at a high mass loading of 30.1 mg cm−2, and the flexible cathode accommodated by polypyrrole nanotubes realizes a remarkably high capacitance of 6212 mF cm−2 (248 F g−1, 25 mg cm−2). The assembled flexible quasi‐solid‐state asymmetric supercapacitor delivers a maximum energy density of 1.42 mWh cm−2 (2.2 V, 2105 mF cm−2), representing the highest value among all reported flexible supercapacitors. This versatile design concept provides a new way to prepare high performance flexible energy storage devices.

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Nickel-cobalt (oxy)hydroxide battery-type supercapacitor electrode with high mass loading

Cited by 77 publications

References 81 publications

High-Energy-Density Asymmetric Supercapacitor Based on a Nickel Cobalt Double Hydroxide/Reduced-Graphene-Oxide Fiber Electrode

High-Energy-Density Asymmetric Supercapacitor Based on a Nickel Cobalt Double Hydroxide/Reduced-Graphene-Oxide Fiber Electrode

Binder-free Mn–V–Sn oxyhydroxide decorated with metallic Sn as an earth-abundant supercapattery electrode for intensified energy storage

Interface Engineering on Cellulose‐Based Flexible Electrode Enables High Mass Loading Wearable Supercapacitor with Ultrahigh Capacitance and Energy Density

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