The hetero-structured nanoarray construction of Co3O4 nanowires anchored on nanoflakes as a high-performance electrode for supercapacitors

Wang, Geng; Yan, Lei; Huang, Haifu; Yan, Faxin; Liang, Xianqing; Xu, Shuaikai; Lan, Zhiqiang; Zhou, Wenzheng; Guo, Jin

doi:10.1016/j.apsusc.2020.147932

Cited by 64 publications

(29 citation statements)

References 44 publications

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“…In the porous zone, the average pore radius of the material falls in the range of 22–23 nm. Porous hexagonal-shaped cubes are advantageous in SC applications because they add porosity, additional active sites, and quick electrolyte ion diffusion [ 24 ].…”

Section: Resultsmentioning

confidence: 99%

Binder-Free Porous 3D-ZnO Hexagonal-Cubes for Electrochemical Energy Storage Applications

et al. 2022

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Considerable efforts are underway to rationally design and synthesize novel electrode materials for high-performance supercapacitors (SCs). However, the creation of suitable materials with high capacitance remains a big challenge for energy storage devices. Herein, unique three-dimensional (3D) ZnO hexagonal cubes on carbon cloth (ZnO@CC) were synthesized by invoking a facile and economical hydrothermal method. The mesoporous ZnO@CC electrode, by virtue of its high surface area, offers rich electroactive sites for the fast diffusion of electrolyte ions, resulting in the enhancement of the SC’s performance. The ZnO@CC electrode demonstrated a high specific capacitance of 352.5 and 250 F g−1 at 2 and 20 A g−1, respectively. The ZnO@CC electrode revealed a decent stability of 84% over 5000 cycles at 20 A g−1 and an outstanding rate-capability of 71% at a 10-fold high current density with respect to 2 A g−1. Thus, the ZnO@CC electrode demonstrated improved electrochemical performance, signifying that ZnO as is promising candidate for SCs applications.

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Section: Resultsmentioning

confidence: 99%

Binder-Free Porous 3D-ZnO Hexagonal-Cubes for Electrochemical Energy Storage Applications

et al. 2022

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“…It also showed much higher capacitance compared to Co 3 O 4 nanowires 44,45 . Again, hydrothermally grown Co 3 O 4 nanowires on Co 3 O 4 nanosheets demonstrated promising electrochemical properties with a very high specific capacitance of 2053.1 Fg −1 at 1 Ag −1 46 …”

Section: Pure and Mixed Tmos As Materials For Electrodes Of Energy St...mentioning

confidence: 92%

An overview on the use of metal vanadium oxides and vanadates in supercapacitors and rechargeable batteries

Banerjee

Dutta

2021

Intl J of Energy Research

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Summary Recent increase in the growth of devices that store energy, keeping in mind the scarcity of fossil fuels, has facilitated in focusing our attention on rechargeable batteries and supercapacitors. In this regard, the metal vanadium oxides and vanadates have emerged as a promising electrode material. These materials enjoy the possession of high theoretical capacitance, coupled with the existence of multiple redox states, which help in decreasing the activation energy for redox reactions. A detailed investigation and analyses regarding the influence of morphology, which gets formed at the time of synthesis of these materials, on the electrochemical characteristics of the electrode has been presented here. In addition, the prospects and challenges associated with the commercialization of metal vanadium oxides and vanadates have also been discussed.

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“…The electrode materials prepared by Yang’s group [ 91 ] and Wang et al [ 92 ] both show good electrochemical properties (883 F g −1 and 1606.6 F g −1 at the current density of 1 A g −1 , respectively). Electrode prepared by Wei [ 93 ] has unique nanoarray structures. The SEM images of Co 3 O 4 /NF with different heating times are shown in Figure 3 a–i.…”

Section: Tmos-based Electrode Materialsmentioning

confidence: 99%

“… SEM images: ( a – c ) Co 3 O 4 /nickel foam (NF)—6 h; ( d – f ) Co 3 O 4 /NF—8 h; ( g – i ) Co 3 O 4 /NF—10 h; ( j – l ) element mapping images of Co 3 O 4 nanoflakes, reproduced with permission from [ 93 ] Copyright 2021 Elsevier. NF, Ni foam.…”

Section: Figurementioning

confidence: 99%

Transition Metal Oxide Electrode Materials for Supercapacitors: A Review of Recent Developments

et al. 2021

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In the past decades, the energy consumption of nonrenewable fossil fuels has been increasing, which severely threatens human life. Thus, it is very urgent to develop renewable and reliable energy storage devices with features of environmental harmlessness and low cost. High power density, excellent cycle stability, and a fast charge/discharge process make supercapacitors a promising energy device. However, the energy density of supercapacitors is still less than that of ordinary batteries. As is known to all, the electrochemical performance of supercapacitors is largely dependent on electrode materials. In this review, we firstly introduced six typical transition metal oxides (TMOs) for supercapacitor electrodes, including RuO2, Co3O4, MnO2, ZnO, XCo2O4 (X = Mn, Cu, Ni), and AMoO4 (A = Co, Mn, Ni, Zn). Secondly, the problems of these TMOs in practical application are presented and the corresponding feasible solutions are clarified. Then, we summarize the latest developments of the six TMOs for supercapacitor electrodes. Finally, we discuss the developing trend of supercapacitors and give some recommendations for the future of supercapacitors.

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The hetero-structured nanoarray construction of Co3O4 nanowires anchored on nanoflakes as a high-performance electrode for supercapacitors

Cited by 64 publications

References 44 publications

Binder-Free Porous 3D-ZnO Hexagonal-Cubes for Electrochemical Energy Storage Applications

Binder-Free Porous 3D-ZnO Hexagonal-Cubes for Electrochemical Energy Storage Applications

An overview on the use of metal vanadium oxides and vanadates in supercapacitors and rechargeable batteries

Transition Metal Oxide Electrode Materials for Supercapacitors: A Review of Recent Developments

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