Facile synthesis of maguey-like CuCo2O4 nanowires with high areal capacitance for supercapacitors

Liao, Lijun; Zhang, Haochen; Li, Wenyao; Huang, Xiaojuan; Xiao, Zhiyin; Xu, Kaibing; Yang, Jianmao; Zou, Rujia; Hu, Junqing

doi:10.1016/j.jallcom.2016.12.004

Cited by 72 publications

(11 citation statements)

References 34 publications

(42 reference statements)

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“…16,17,[25][26][27][28][29][30][31][32][33][34][35][36][37][38][39] Two-dimensional (2D) ultrathin nanosheets are more favorable for energy conversion and storage devices because their unique morphologies can provide easy diffusion paths for ions and electrons, large electrochemically active sites at the electrode-electrolyte interface, high electrical conductivity, and improved structural stability. 40 Although some research groups have reported the synthesis of CuCo2O4 with various nanomorphologies as supercapacitor electrodes, 16,26,27,[29][30][31][32][33][34][35][36][37][38][39] its capability for water splitting catalysis is rarely investigated. 25,28,31,[41][42][43][44] A general development strategy for oxygen evolution reaction (OER) catalysts is to search for a facile route to synthesize cheap, efficient catalytic materials with optimized chemical compositions and morphologies.…”

Section: Introductionmentioning

confidence: 99%

Nanoporous CuCo2O4 nanosheets as a highly efficient bifunctional electrode for supercapacitors and water oxidation catalysis

Pawar

Babar

et al. 2019

Applied Surface Science

104

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Ultrathin nanoporous CuCo2O4 nanosheets can be synthesized on nickel foam (NF) via an electrodeposition method followed by air annealing treatment. The electrochemical energy storage and oxygen evolution reaction (OER) properties are studied in aqueous 1M KOH solution. The CuCo2O4 nanosheet electrode exhibits a high specific capacitance of 760 F/g at 1 A/g with a capacity retention of ~ 85% after 5000 cycles and 1473 F/g at 1 A/g in 3M KOH solution. The CuCo2O4 nanosheet electrode works as a highly efficient OER electrocatalyst, demonstrating an overpotential of 260 mV at 20 mA/cm 2 with a Tafel slope of ~ 64 mV/dec., which is the lowest among other copper-cobalt based transition metal oxide catalysts. The catalyst is very stable at > 20 mA/cm 2 for more than 25 h. The superior electrochemical performance of the CuCo2O4 nanosheets is due to the synergetic effect of the direct growth of 2D nanosheet structure and a large electrochemically active surface area associated with nanopores on the CuCo2O4 nanosheet surface.

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Section: Introductionmentioning

confidence: 99%

Nanoporous CuCo2O4 nanosheets as a highly efficient bifunctional electrode for supercapacitors and water oxidation catalysis

Pawar

Babar

et al. 2019

Applied Surface Science

104

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“…The equivalent circuit diagram consists of five circuit elements: combined resistance‐Rs (6.5 Ω), a charge transfer resistance‐Rct (0.9 Ω), Warburg resistance‐W (0.16 mho), double layer capacitance‐C (976 μF) and constant phase element‐CPE (0.1 mho and n=0.9). The charge transfer obtained for CuCo 2 O 4 ‐Flowers is 0.9 Ω and much lower than that of previously reported CuCo 2 O 4 nanostructures . Liao et al.…”

Section: Resultsmentioning

confidence: 66%

“…The charge transfer obtained for CuCo 2 O 4 -Flowers is 0.9 Ω and much lower than that of previously reported CuCo 2 O 4 nanostructures. [5,45,47,48]…”

Section: Resultsmentioning

confidence: 99%

Tunability of Porous CuCo₂O₄ Architectures as High‐Performance Electrode Materials for Supercapacitors

et al. 2019

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Copper cobaltite (CuCo2O4) porous structures with different morphologies are prepared through a hydrothermal method and subsequent annealing process. The tunability of morphologies is succeeded by simply regulation of solvent medium and amount of the polyvinylpyrrolidone (PVP) which is served as structure directing agent. All the prepared samples have a mesoporous nature. Specifically, the CuCo2O4‐porous structures with flowers morphology have a higher surface area (43.2 m2 g−1) and porosity (0.18 cm3 g−1) than the other porous nano structures such as flakes, blades and wires. The maximum specific capacity of CuCo2O4‐Flowers is 466.4 C g−1 at a current density of 2 A g−1. The cycling stability of CuCo2O4‐Flowers shows capacity retention of 86.3 % at a high current density of 15 A g−1 after completion of 5000 charge‐discharge cycles. The electrochemical results demonstrate that the CuCo2O4‐Flower shows superior performance than the CuCo2O4‐Flakes, Blade and Wires.

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“…Liao et al successfully grown the magueylike CuCo 2 O 4 nanowires on nickel foam via a common hydrothermal approach followed by the annealing process. [92] The [91] Copyright 2019, Academic Press Inc. c) Ragone plots about O v -Cu-Co 3 O 4 @C//S-rGO ASC and the previously reported ASCs. d) Wearable manifestation as an energy-storage system applying two serially connected devices to light up a green bulb.…”

Section: Metal Oxidesmentioning

confidence: 89%

“…Liao et al successfully grown the maguey‐like CuCo 2 O 4 nanowires on nickel foam via a common hydrothermal approach followed by the annealing process. [ 92 ] The binder‐free CuCo 2 O 4 electrode achieved a gravimetric capacitance of 982 F g −1 under 1.5 A g −1 and an areal capacitance of 3.27 F cm −2 at 5 mA cm −2 . Meanwhile, the constructed symmetric supercapacitor possessed an energy density of 16.8 Wh kg −1 under 513 W kg −1 .…”

Section: Supercapacitorsmentioning

confidence: 99%

A Review on the Conventional Capacitors, Supercapacitors, and Emerging Hybrid Ion Capacitors: Past, Present, and Future

Sun

Luo

2022

Adv Energy and Sustain Res

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Electrochemical energy storage (EES) devices with high‐power density such as capacitors, supercapacitors, and hybrid ion capacitors arouse intensive research passion. Recently, there are many review articles reporting the materials and structural design of the electrode and electrolyte for supercapacitors and hybrid capacitors (HCs), though these reviews always focus on individual supercapacitors or single HCs. Herein, the conventional capacitor, supercapacitor, and hybrid ion capacitor are incorporated, as the detailed description of conventional capacitors is very fundamental and necessary for the better understanding and development of supercapacitors and hybrid ion capacitors, which are often ignored. Therefore, herein, the fundamentals and recent advances of conventional capacitors, supercapacitors, and emerging hybrid ion capacitors are comprehensively and systematically summarized in terms of history, mechanisms, electrode materials, existing challenges, and perspectives. At the same time, it is believed that a comprehensive and fundamental understanding for capacitor‐related EES devices is provided in the review and has a great guiding role for future development.

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Facile synthesis of maguey-like CuCo2O4 nanowires with high areal capacitance for supercapacitors

Cited by 72 publications

References 34 publications

Nanoporous CuCo2O4 nanosheets as a highly efficient bifunctional electrode for supercapacitors and water oxidation catalysis

Nanoporous CuCo2O4 nanosheets as a highly efficient bifunctional electrode for supercapacitors and water oxidation catalysis

Tunability of Porous CuCo₂O₄ Architectures as High‐Performance Electrode Materials for Supercapacitors

A Review on the Conventional Capacitors, Supercapacitors, and Emerging Hybrid Ion Capacitors: Past, Present, and Future

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Facile synthesis of maguey-like CuCo2O4 nanowires with high areal capacitance for supercapacitors

Cited by 72 publications

References 34 publications

Nanoporous CuCo2O4 nanosheets as a highly efficient bifunctional electrode for supercapacitors and water oxidation catalysis

Nanoporous CuCo2O4 nanosheets as a highly efficient bifunctional electrode for supercapacitors and water oxidation catalysis

Tunability of Porous CuCo2O4 Architectures as High‐Performance Electrode Materials for Supercapacitors

A Review on the Conventional Capacitors, Supercapacitors, and Emerging Hybrid Ion Capacitors: Past, Present, and Future

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Tunability of Porous CuCo₂O₄ Architectures as High‐Performance Electrode Materials for Supercapacitors