One-step electrochemical synthesis of three-dimensional graphene foam loaded nickel–cobalt hydroxides nanoflakes and its electrochemical properties

Dong, Shuang; Dao, Anh Quang; Zheng, Bowen; Tan, Zhengyan; Fu, Chaoyang; Liu, Hongfang; Xiao, Fei

doi:10.1016/j.electacta.2014.09.061

Cited by 57 publications

(21 citation statements)

References 54 publications

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“…Metal layered double hydroxides (LDH) have been reported to have higher conductivity, large inter-layer spacing, better ion exchange and transport for the reaction species which are neccessary for the production of hybrid devices with superior electrochemical performance [35][36][37]. Some of the LDH materials that have been investigated as positive electrode materials for hybrid supercapacitors include Ni-Co, Co-Al, Ni-Al, Ni-Mn, Co-Mn etc [41][42][43][44]. More specifically, Co-Mn has recently attracted research interest due to the unique redox combination of both Co 2+ /Mn 2+ and many researchers have reported on optimizing the structure and morphology of the as-synthesized Co-Mn LDH and its composites with other materials using various interesting techniques.…”

Section: Introductionmentioning

confidence: 99%

High performance hybrid supercapacitor device based on cobalt manganese layered double hydroxide and activated carbon derived from cork (Quercus Suber)

Ochai-Ejeh

Madito

Momodu

et al. 2017

Electrochimica Acta

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Section: Introductionmentioning

confidence: 99%

High performance hybrid supercapacitor device based on cobalt manganese layered double hydroxide and activated carbon derived from cork (Quercus Suber)

Ochai-Ejeh

Madito

Momodu

et al. 2017

Electrochimica Acta

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“…In the medium frequency range, the diffusion of the three electrode materials in the electrolyte is not much difference. In the inset, the intrinsic solution resistance ( R S ) and the charge transfer resistances ( R ct ) are corresponding to the intercept on the real axis and the diameter of the flat semicircle in the high frequency range, respectively 49 . In Fig.…”

Section: Resultsmentioning

confidence: 99%

3D β-Ni(OH)2 nanowires/RGO composite prepared by phase transformation method for superior electrochemical performance

et al. 2019

Sci Rep

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In order to improve the capacity and rate performance of nickel-metal hydride (Ni-MH) batteries, we proposed a simple phase transformation method to synthesis 3D β-nickel hydroxide nanowires/reduced graphene oxide (β-Ni(OH) 2 NWs/RGO) composite. β-Ni(OH) 2 nanowires with diameters of 20–30 nm and lengths up to several micrometers were decorated on RGO layers, forming 3D network structure. The 3D β-Ni(OH) 2 NWs/RGO composite displayed a discharge capacity of 343.2 mAh/g at 0.2C, and the capacity values has almost no loss after 100th cycles. When the discharge rate was at 5C, the capacity reached a value of 272.7 mAh/g, and its capacity retention was 79.5%. It showed good capacity and rate performance as a positive material for Ni-MH batteries.

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“…Also, the redox reaction of PPy in the presence of alkaline electrolyte occurs near the similar voltage range for the redox reaction of NiO materials 29 . S5) Our electrode shows comparable or high areal capacitance even at the high areal current density, when compared to the other film-type electrochemical capacitor [30][31][32][33][34][35][36][37] . The CV curve enclosed area for PPy-coated NiO nanowalls electrode is larger than that of NiO nanowalls electrode, indicating that higher capacitance of PPy-coated NiO nanowalls electrode.…”

mentioning

confidence: 87%

Stackable, three dimensional carbon–metal oxide composite for high performance supercapacitors

et al. 2015

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We report the stackable all-solid-state supercapacitor based on the three dimensional ppy-NiO/RGO-CNT electrodes. The electrode was prepared by growing NiO nanowalls (NWs) on both sides of a freestanding RGO-CNT film with hydrothermal method, followed by being coated with conductive polypyrrole. The double-sided architecture of NiO NWs on carbon-based current collector suggests the novel approach in addressing the issue of low areal capacitance in supercapacitor. Furthermore, conductive polypyrrole renders fast electron transport through the two-dimensional structure of NiO NWs. With our 3Ddesigned electrode, we successfully fabricated the stackable all-solid-state supercapacitor and thus achieved high areal capacitance of 1,948 mF cm -2 . PPy-coated NiO nanowalls were encapsulated with PVA-KOH gel electrolyte, producing a single electrode of all-solid-state supercapacitors. A pair of the electrochemical capacitors exhibited the areal capacitance of 664 mF cm -2 at a current density of 1 mA cm -2 . In this work, we demonstrated a prototype multilayered supercapacitors by stacking 3 pairs of

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One-step electrochemical synthesis of three-dimensional graphene foam loaded nickel–cobalt hydroxides nanoflakes and its electrochemical properties

Cited by 57 publications

References 54 publications

High performance hybrid supercapacitor device based on cobalt manganese layered double hydroxide and activated carbon derived from cork (Quercus Suber)

High performance hybrid supercapacitor device based on cobalt manganese layered double hydroxide and activated carbon derived from cork (Quercus Suber)

3D β-Ni(OH)2 nanowires/RGO composite prepared by phase transformation method for superior electrochemical performance

Stackable, three dimensional carbon–metal oxide composite for high performance supercapacitors

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