Aqueous asymmetric supercapacitor based on RuO2-WO3 electrodes

Ji, Su‐Hyeon; Chodankar, Nilesh R.; Kim, Do‐Heyoung

doi:10.1016/j.electacta.2019.134879

Cited by 61 publications

(29 citation statements)

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“…The hybrid electrode material, RuO 2 @S/G-60, has a specific capacitance up to 988 F g −1 and excellent rate capability at 1 A g −1 . Hexagon WO 3 (h-WO 3 ) and hydrous RuO 2 were respectively prepared on three-dimensional conducting carbon cloth (CC) via the hydrothermal method [72], which meant fast electronic pathway, high conductivity substrate, high surface area, and enhanced electrochemical performance. Figure 2a-d shows the field emission scanning electron microscopy (FE-SEM) images, transmission electron microscope (TEM) image, and high resolution transmission electron microscope (HRTEM) image of hydrous RuO 2 at different magnifications.…”

Section: Hydrographic Ruomentioning

confidence: 99%

“…By comparison, an all-pseudocapacitive asymmetric device [73] has an energy density of only 37 µW h cm −2 at 40 mW cm −2 , but a remarkable 96% retention after 20,000 charge/discharge cycles. The inset shows the SAED pattern, reproduced with permission from [72] Copyright 2019 Elsevier. FE-SEM, field emission scanning electron microscopy.…”

Section: Hydrographic Ruomentioning

confidence: 99%

“…A variety of Co3O4 nan materials have been synthesized, such as nanowires [81], nanofibers [82], nanopartic [83,84], and nanosheets [85]. Yue and co-workers [86] used a simple and environmenta [72] Copyright 2019 Elsevier. FE-SEM, field emission scanning electron microscopy.…”

Section: Co3o4 Nanomaterialsmentioning

confidence: 99%

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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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Section: Hydrographic Ruomentioning

confidence: 99%

Section: Hydrographic Ruomentioning

confidence: 99%

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

et al. 2021

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“…Notably, when used as the electrode in SC, even after 10,000 charge-discharge cycles, 93.4% of its initial capacitance was maintained. In addition, WO 3 3D nanorods array [71], cactus-like microspheres hierarchy 3D structure assembled by numerous nanorods [79,80], mesoporous pancake-like h-WO 3 [52], and WO 3 •H 2 O flower-like hierarchical architecture composed of nanosheets [82] have also been reported, showing much enhanced performance in comparison to most WO 3 .…”

Section: Single Phase Wo3 Nanostructuresmentioning

confidence: 99%

Advances in Electrochemical Energy Devices Constructed with Tungsten Oxide-Based Nanomaterials

Han

Shi

2021

Nanomaterials

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Tungsten oxide-based materials have drawn huge attention for their versatile uses to construct various energy storage devices. Particularly, their electrochromic devices and optically-changing devices are intensively studied in terms of energy-saving. Furthermore, based on close connections in the forms of device structure and working mechanisms between these two main applications, bifunctional devices of tungsten oxide-based materials with energy storage and optical change came into our view, and when solar cells are integrated, multifunctional devices are accessible. In this article, we have reviewed the latest developments of tungsten oxide-based nanostructured materials in various kinds of applications, and our focus falls on their energy-related uses, especially supercapacitors, lithium ion batteries, electrochromic devices, and their bifunctional and multifunctional devices. Additionally, other applications such as photochromic devices, sensors, and photocatalysts of tungsten oxide-based materials have also been mentioned. We hope this article can shed light on the related applications of tungsten oxide-based materials and inspire new possibilities for further uses.

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“…However, high‐cost and agglomeration problem significantly impedes the practical applications of pure RuO 2 electrodes [12,13] . Therefore, combination of RuO 2 with various materials (such as carbon, other metal oxides/derivatives, or conducting polymer) into well‐defined binary or ternary nanocomposites is an effective way to reduce the production cost and maximum utilization of RuO 2 [14–17] . For example, Liu's group synthesis carbon aerogel/RuO 2 hybrid composites with hollow microtubular structure, it possessed a specific capacity of 433 F g −1 at 1 A g −1 [18] .…”

Section: Introductionmentioning

confidence: 99%

Controllable Intercalated Polyaniline Nanofibers Highly Enhancing the Utilization of Delaminated RuO₂ Nanosheets for High‐Performance Hybrid Supercapacitors

et al. 2022

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Ruthenium oxide (RuO2) and polyaniline (PANI) are attracting extensive attention as electrode materials due to their remarkable pseudocapacitance. However, RuO2 suffers from low utilization and PANI sustains poor stability. Herein, both defects were optimized by designing intercalated‐structure PANI/RuO2 composites, which were fabricated for the first time by controllable chemical polymerization of aniline on the delaminated RuO2 nanosheets. Intercalated PANI nanofibers not only highly prevent the RuO2 nanosheets from their reassembling as well as increase the interlayer spacing among RuO2 nanosheets but also alleviate the swelling/shrinking of PANI during charge‐discharge progress. In comparison to the pristine RuO2 nanosheets, the obtained intercalated structure is beneficial for creating channels for better ion transfer and electron transport, which leads to a high‐efficiency utilization of RuO2 nanosheets. The optimized PANI/RuO2‐38 electrode with a RuO2 content of 61.7 wt% shows the highest utilization of 72.1 % of RuO2, resulting in the highest specific capacity of 816 F g−1. The asymmetric supercapacitor PANI/RuO2//AC offers a high energy density of 25.7 Wh kg−1 at 375 kW kg−1, further indicating a good potential as energy‐storage device.

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Aqueous asymmetric supercapacitor based on RuO2-WO3 electrodes

Cited by 61 publications

References 50 publications

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

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

Advances in Electrochemical Energy Devices Constructed with Tungsten Oxide-Based Nanomaterials

Controllable Intercalated Polyaniline Nanofibers Highly Enhancing the Utilization of Delaminated RuO₂ Nanosheets for High‐Performance Hybrid Supercapacitors

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Aqueous asymmetric supercapacitor based on RuO2-WO3 electrodes

Cited by 61 publications

References 50 publications

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

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

Advances in Electrochemical Energy Devices Constructed with Tungsten Oxide-Based Nanomaterials

Controllable Intercalated Polyaniline Nanofibers Highly Enhancing the Utilization of Delaminated RuO2 Nanosheets for High‐Performance Hybrid Supercapacitors

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Controllable Intercalated Polyaniline Nanofibers Highly Enhancing the Utilization of Delaminated RuO₂ Nanosheets for High‐Performance Hybrid Supercapacitors