Hierarchical FeCo2O4@NiCo layered double hydroxide core/shell nanowires for high performance flexible all-solid-state asymmetric supercapacitors

He, Xinyi; Li, Rumin; Liu, Jingyuan; chen, RongRong; Song, Dalei; Wang, Jun

doi:10.1016/j.cej.2017.11.089

Cited by 391 publications

(121 citation statements)

References 57 publications

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“…Figure b exhibits the fitted high resolution XPS spectrum of Co 2p. The binding energy located at 780.1 and 796.4 eV are assigned to Co 2+ . The peak located at a binding energy of 781.8 eV corresponding to CoO(OH), matching well with previously reported spectra of Co(OH) 2 .…”

Section: Resultssupporting

confidence: 89%

“…The binding energy located at 780.1 and 796.4 eV are assigned to Co 2 + . [28] The peak located at a binding energy of 781.8 eV corresponding to CoO(OH), matching well with previously reported spectra of Co(OH) 2 . [29] Furthermore, a broad satellite peak at 785.1 eV is found, which is attributed to a high-spin Co 2 + .…”

Section: Structural and Morphological Characterizationssupporting

confidence: 90%

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Carbon Cloth Modified with Metal‐Organic Framework Derived CC@CoMoO₄‐Co(OH)₂ Nanosheets Array as a Flexible Energy‐Storage Material

Zhao

Dong

et al. 2019

ChemElectroChem

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Due to the urgent demand for portable electronics, enormous research efforts are devoted for the development of flexible, wearable and lightweight supercapacitors. Herein, we report a cost‐effective chemical liquid process followed with a refluxing route to grow CC@CoMoO4‐Co(OH)2 nanosheets with Co‐based MOF as precursor. The resulting CC@CoMoO4‐Co(OH)2‐4 electrode delivers a significantly enhanced specific capacitance of 2028 F g−1 at 1 A g−1 and capacitance of 1581.8 F g−1 at 20 A g−1. Furthermore, the flexible all‐solid‐state asymmetric supercapacitor (CC@CoMoO4‐Co(OH)2//AC) is assembled, displays a high energy density of 61 Wh kg−1 at power density of 800 W kg−1, with an excellent cycle stability. These exceptional electrochemical performances could be ascribed to the unique structure and multi‐metal ion combination contributes to the ideal synergistic effects, which also signify that the potential application of CC@CoMoO4‐Co(OH)2 nansheets in high‐performance supercapacitors.

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Section: Resultssupporting

confidence: 89%

Section: Structural and Morphological Characterizationssupporting

confidence: 90%

Carbon Cloth Modified with Metal‐Organic Framework Derived CC@CoMoO₄‐Co(OH)₂ Nanosheets Array as a Flexible Energy‐Storage Material

Zhao

Dong

et al. 2019

ChemElectroChem

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“…According to the above‐mentioned results and related reports, the possible mechanism for Co 2 (OH) 3 Cl@FeCo 2 O 4 composite synthesis by this one ‐step hydrothermal route may be summarized as following Equations:

{Co}^{2 +} + H_{2} O \to {[Co {((), H_{2} O)}_{6}]}^{2 +}

{[Co {((), H_{2} O)}_{6}]}^{2 +} + n {Cl}^{-} \to {[Co {italicCl}_{n} {((), H_{2} O)}_{6 - n}]}^{2 - n} + n H_{2} O

{NH}_{3} ∙ H_{2} O \to {NH}_{4}^{+} + {OH}^{-}

{NH}_{3} + H_{2} O \to {NH}_{4}^{+} + {OH}^{-}

{Fe}^{2 +} + 2 {Co}^{2 +} + 6 {OH}^{-} \to italicFe {Co}_{2} {(italicOH)}_{6} \to italicFe {Co}_{2} O_{4}

2 {[Co {italicCl}_{n} {((), H_{2} O)}_{6 - n}]}^{2 - n} \to {Co}_{2} {(italicOH)}_{3}

…”

Section: Resultsmentioning

confidence: 90%

“…Moreover, because of the reason that Co 2 (OH) 3 Cl can be regarded as isostructural Co(OH) 2 with positively charged Co(OH) 2‐x and charge balancing chloride ions, related redox reactions may be based on the following Equations:

italicFe {Co}_{2} O_{4} + H_{2} O + {OH}^{-} \leftrightarrow italicFeOOH + 2 italicCoOOH + e^{-}

italicCo {(italicOH)}_{2} + {OH}^{-} \leftrightarrow italicCoOOH + H_{2} O + e^{-}

italicCoOOH + {OH}^{-} \leftrightarrow italicCo O_{2} + H_{2} O + e^{-}

italicFeOOH + H_{2} O \leftrightarrow italicFe {(italicOH)}_{3} \leftrightarrow italicFe O_{4}^{2 -} + 3 e^{-}

…”

Section: Resultsmentioning

confidence: 99%

Hierarchitecture Co ₂ (OH) ₃ Cl@FeCo ₂ O ₄ composite as a novel and high‐performance electrode material applied in supercapacitor

Wang

Peng

et al. 2020

Int J Energy Res

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Summary One‐step hydrothermal reaction has successfully been used to prepared three‐dimensional hierarchitecture Co2(OH)3Cl@FeCo2O4 composite without any annealing treatment. The samples are investigated to confirm the crystal structure, elemental composition, morphology structure and electrochemical performance. The results show the sample has a three‐dimensional hierarchitecture that nanoblocks are assembled with nanoparticles. And the specific surface area is 87.5 m2 g−1 and the total pore volume is 0.17 cm3 g−1. Meanwhile, the composite shows a high specific capacitance of 1110.0 F·g−1 at 1 A·g−1 and great cycling stability with 98.8% capacitance retention after 3000 cycles. To evaluate the electrochemical performances, the results are used to compare with the Co2(OH)3Cl and FeCo2O4 nanomaterials, indicating a higher capacitance and longer cycle stability shown by the as‐synthesized sample. The as‐synthesized Co2(OH)3Cl@FeCo2O4 composite has an outstanding electrochemical performance, predicting an enormous potential and promising future as a novel electrode material applied in supercapacitor.

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“…[8] In recent years, two-dimensional (2D) materials are popular in supercapacitors because they provide more exposed surface area and high chemical activity, which contributes a lot to the specific capacitance. [9] Owing to the advantages of high specific capacitance, low cost and environmental friendliness, layered double hydroxide (LDH) is proven to be one prospective material of 2D materials for energy storage applications. [10] However, pure LDH-based materials have some drawbacks, such as insufficient power supply and severe aggregation.…”

Section: Introductionmentioning

confidence: 99%

Sulfidation of Hierarchical NiAl−LDH/Ni−MOF Composite for High‐Performance Supercapacitor

Zheng¹,

Sun²,

Xu³

et al. 2019

ChemElectroChem

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Designing nanocomposites with good electrochemical properties is the key to studying electrode materials for supercapacitors. In this paper, we report a well‐defined composite (NiAl‐LDH/Ni−MOF/S) prepared in three steps. After the synthesis of LDH nanoplates through a hydrothermal method, the MOF nanosheets were grown on its surface by in situ nucleation. In this procedure, the synergistic effect of MOF and LDH will improve the specific capacitance. Afterwards, the composite was subjected to a sulfidation treatment to enhance its electrical conductivity. Consequently, the NiAl‐LDH/Ni−MOF/S has an excellent specific capacitance (1670 F g−1 at 1 A g−1) and rate capability (65 % from 1 to 30 A g−1). Moreover, an asymmetric supercapacitor (ASC) was assembled with NiAl‐LDH/Ni−MOF/S as cathode and activated carbon as anode. The ASC displays a maximum energy density (35.4 Wh kg−1) and outstanding cycle stability (retention of 96.4 % after 10000 cycles at 10 A g−1), demonstrating the potential of the electrode for use in high‐efficiency electrochemical capacitors.

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Hierarchical FeCo2O4@NiCo layered double hydroxide core/shell nanowires for high performance flexible all-solid-state asymmetric supercapacitors

Cited by 391 publications

References 57 publications

Carbon Cloth Modified with Metal‐Organic Framework Derived CC@CoMoO₄‐Co(OH)₂ Nanosheets Array as a Flexible Energy‐Storage Material

Carbon Cloth Modified with Metal‐Organic Framework Derived CC@CoMoO₄‐Co(OH)₂ Nanosheets Array as a Flexible Energy‐Storage Material

Hierarchitecture Co ₂ (OH) ₃ Cl@FeCo ₂ O ₄ composite as a novel and high‐performance electrode material applied in supercapacitor

Sulfidation of Hierarchical NiAl−LDH/Ni−MOF Composite for High‐Performance Supercapacitor

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Hierarchical FeCo2O4@NiCo layered double hydroxide core/shell nanowires for high performance flexible all-solid-state asymmetric supercapacitors

Cited by 391 publications

References 57 publications

Carbon Cloth Modified with Metal‐Organic Framework Derived CC@CoMoO4‐Co(OH)2 Nanosheets Array as a Flexible Energy‐Storage Material

Carbon Cloth Modified with Metal‐Organic Framework Derived CC@CoMoO4‐Co(OH)2 Nanosheets Array as a Flexible Energy‐Storage Material

Hierarchitecture Co 2 (OH) 3 Cl@FeCo 2 O 4 composite as a novel and high‐performance electrode material applied in supercapacitor

Sulfidation of Hierarchical NiAl−LDH/Ni−MOF Composite for High‐Performance Supercapacitor

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Carbon Cloth Modified with Metal‐Organic Framework Derived CC@CoMoO₄‐Co(OH)₂ Nanosheets Array as a Flexible Energy‐Storage Material

Carbon Cloth Modified with Metal‐Organic Framework Derived CC@CoMoO₄‐Co(OH)₂ Nanosheets Array as a Flexible Energy‐Storage Material

Hierarchitecture Co ₂ (OH) ₃ Cl@FeCo ₂ O ₄ composite as a novel and high‐performance electrode material applied in supercapacitor