Shape-controlled synthesis of ternary nickel cobaltite and their application in supercapacitors

Pu, Jun; Jin, Xiaoquan; Wang, Jie; Cui, Fangling; Chu, Sibin; Sheng, Enhong; Wang, Zhenghua

doi:10.1016/j.jelechem.2013.08.021

Cited by 19 publications

(9 citation statements)

References 43 publications

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“…Furthermore, such a vertically aligned CNT/NiCo 2 O 4 core/shell structure electrode has much better rate performance compared with the reported NiCo 2 O 4 -based electrode materials, including porous hexagonal NiCo 2 O 4 x S y and so on (the corresponding results are listed in Table 1). 32,39,41,[44][45][46][47][48][49][50][51][52][53] Energy density and power density are two key factors to evaluate the applications of supercapacitors. A good electrode material is expected to provide high energy density and high capacitance simultaneously at high charge/discharge rates.…”

Section: Resultsmentioning

confidence: 99%

A three dimensional vertically aligned multiwall carbon nanotube/NiCo₂O₄core/shell structure for novel high-performance supercapacitors

et al. 2014

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Three dimensional (3D) vertically aligned structures have attracted tremendous attention from scientists in many fields due to their unique properties. In this work, we have built the 3D vertically aligned carbon nanotube (CNT)/NiCo 2 O 4 core/shell nanoarchitecture via a facile electrochemical deposition method followed by subsequent annealing in air. The morphology and structure have been in-depth characterized by SEM, TEM, XRD and Raman spectroscopy. Impressively, when used as the electrode material in a 6 M KOH electrolyte, the vertically aligned CNT/NiCo 2 O 4 core/shell structures exhibit excellent supercapacitive performances, including high specific capacitance, excellent rate capability and good cycle stability. This is due to the unique 3D vertically aligned CNT/NiCo 2 O 4 core/shell structures, which support high electron conductivity, large surface area of NiCo 2 O 4 and fast ion/electron transport in the electrode and at the electrolyte-electrode interface. Furthermore, the synthesis strategy presented here can be easily extended to fabricate other metal oxides with a controlled core/shell structure, which may be a promising facile strategy for high performance supercapacitors, and even advanced Li-ion batteries.

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Section: Resultsmentioning

confidence: 99%

A three dimensional vertically aligned multiwall carbon nanotube/NiCo₂O₄core/shell structure for novel high-performance supercapacitors

et al. 2014

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“…The semi‐circle became larger after 1000 cycles. These results also reveal the enhancement of the charge‐transfer resistance in the electrode reaction [13].…”

Section: Resultsmentioning

confidence: 89%

“…In the past decade, transition metal oxides and their composites have been applied in the field of SCs because of their good capacitive properties and environmental friendliness. Among them, the ternary nickel cobaltite (AB 2 O 4 ) with different morphologies has been conceived as a promising SC electrode material [8][9][10][11][12][13][14][15][16][17][18][19]. A simple template-free solution method combined with a post-annealing treatment has been successfully developed to grow interconnected NiCo 2 O 4 materials on various conductive substrates (such as Ni foam, Ti foil, stainless-steel foil, flexible graphite paper or carbon fabric and carbon fibre) with robust adhesion as a binder-and conductive-agent-free electrode for SCs [8][9][10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Ni‐riched NiO‐Co ₃ O ₄ sheet‐like nanocomposites and their application in supercapacitors

Wang

Zhang

et al. 2015

Micro & Nano Letters

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In this reported work Ni-riched NiO-Co 3 O 4 sheet-like nanocomposites (SNCs) were obtained through a facile solvothermal method in a mixed solvent and subsequently calcinated in air. Galvanostatic charge-discharge measurement revealed that the Ni-riched NiO-Co 3 O 4 SNCs electrode has an impressive specific capacitance as high as 836 F g −1 at 4 A g −1 in 3 M KOH solution. The as-obtained Ni-riched NiO-Co 3 O 4 SNCs product showed a weak cycling stability, but the higher capacitance (424 F g −1) was retained after 1000 cycles at 4 A g −1 .

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“…[24][25][26][27][28][29] Also, NiCo 2 O 4 possesses better electrical conductivity and electrochemicala ctivity than NiO and Co 3 O 4 . [8,9] Over the past decade, much effort has been devoted to the synthesis of NiCo 2 O 4 with variousm orphologies, including nanowires, [30] nanoflowers, [31] chain-like nanostructures, [32] nanoflakes, [33] nanohexapods, [34] nanotubes, [35] and nanoneedle arrays. [36] Recently,g reat success was achieved with NiCo 2 O 4 for high specific capacitance supercapacitor applications by directly growing NiCo 2 O 4 nanostructures on conductives ubstrates.…”

Section: Introductionmentioning

confidence: 99%

Shape‐Controlled Synthesis of NiCo₂O₄ Microstructures and Their Application in Supercapacitors

Xiang

2015

Chemistry An Asian Journal

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The shape-controlled synthesis of NiCo2 O4 microstructures through a facile hydrothermal method and subsequent calcinations was explored. By employing CoSO4 , NiSO4 , and urea as the starting reactants, flower-like NiCo2 O4 microstructures were obtained at 100 °C after 5 h without the assistance of any additive and subsequent calcination at 300 °C for 2 h; dumbbell-like NiCo2 O4 microstructures were prepared at 150 °C after 5 h in the presence of trisodium citrate and subsequent calcination at 300 °C for 2 h. The as-prepared NiCo2 O4 microstructures were characterized by X-ray powder diffraction, field-emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, and (high-resolution) transmission electron microscopy. Both the flower-like and dumbbell-like NiCo2 O4 microstructures could be used as electrode materials for supercapacitors, and they exhibited excellent electrochemical performance, including high specific capacitance, good rate capability, and excellent long-term cycle stability. Simultaneously, the shape-dependent electrochemical properties of the product were investigated.

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Shape-controlled synthesis of ternary nickel cobaltite and their application in supercapacitors

Cited by 19 publications

References 43 publications

A three dimensional vertically aligned multiwall carbon nanotube/NiCo₂O₄core/shell structure for novel high-performance supercapacitors

A three dimensional vertically aligned multiwall carbon nanotube/NiCo₂O₄core/shell structure for novel high-performance supercapacitors

Synthesis of Ni‐riched NiO‐Co ₃ O ₄ sheet‐like nanocomposites and their application in supercapacitors

Shape‐Controlled Synthesis of NiCo₂O₄ Microstructures and Their Application in Supercapacitors

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Shape-controlled synthesis of ternary nickel cobaltite and their application in supercapacitors

Cited by 19 publications

References 43 publications

A three dimensional vertically aligned multiwall carbon nanotube/NiCo2O4core/shell structure for novel high-performance supercapacitors

A three dimensional vertically aligned multiwall carbon nanotube/NiCo2O4core/shell structure for novel high-performance supercapacitors

Synthesis of Ni‐riched NiO‐Co 3 O 4 sheet‐like nanocomposites and their application in supercapacitors

Shape‐Controlled Synthesis of NiCo2O4 Microstructures and Their Application in Supercapacitors

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A three dimensional vertically aligned multiwall carbon nanotube/NiCo₂O₄core/shell structure for novel high-performance supercapacitors

A three dimensional vertically aligned multiwall carbon nanotube/NiCo₂O₄core/shell structure for novel high-performance supercapacitors

Synthesis of Ni‐riched NiO‐Co ₃ O ₄ sheet‐like nanocomposites and their application in supercapacitors

Shape‐Controlled Synthesis of NiCo₂O₄ Microstructures and Their Application in Supercapacitors