Facile co-deposition of the carbon nanotube@MnO2 heterostructure for high-performance flexible supercapacitors

Wu, Keqi; Ye, Zhiguo; Ding, Yi; Zhu, Zhixiang; Peng, Xuerong; Li, Duosheng; Ma, Guiping

doi:10.1016/j.jpowsour.2020.229031

Cited by 42 publications

(25 citation statements)

References 46 publications

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“…Additionally, d 10 metal-based nanomaterials showed excellent electrocatalytic performance such as water oxidation. − Compared to the Mn 13 -cluster-based materials, the Co/Ni doping Mn 13 -cluster nanowire arrays greatly enhanced their electrocatalytic activity (Figure S10).…”

Section: Results and Discussionmentioning

confidence: 99%

Mn₁₃-Cluster-Based Nanowire Arrays Deposited on Ni Foam for the Oxygen Evolution Reaction

Jiang

Chen

et al. 2022

ACS Appl. Nano Mater.

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Exploration of high-efficiency water oxidation electrocatalysts using low-cost functional materials is a current challenge. Herein, a new strategy has been investigated for developing oxygen evolution reaction (OER) electrocatalysts by depositing crystalline nanowire arrays of Mn13-clusters (Mn13-NS) on Ni foam (NF). The resulting Mn13-NS/NF can further incorporate ultrasmall Fe(III) dopants to improve OER activity that exhibits a low overpotential of 357 mV and an exceptional Tafel plot slope of 41 mV dec–1 under strongly alkaline conditions.

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Section: Results and Discussionmentioning

confidence: 99%

Mn₁₃-Cluster-Based Nanowire Arrays Deposited on Ni Foam for the Oxygen Evolution Reaction

Jiang

Chen

et al. 2022

ACS Appl. Nano Mater.

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“…Therefore, the integration of MnO x /CNT-based high performance electrode material with a small amount of conducting counterpart may be one of the better choices where the high theoretical specific capacitance of MnO x can be utilized in the composite system. Some of the other investigations also validate that the incorporation of CNTs into the AMO matrix is likely to improve the electrochemical performance of composite electrode. − …”

Section: Introductionmentioning

confidence: 85%

“…The specific capacitance of the tested working electrodes is estimated from the CV ( C 1 , F g –1 ) and GCD ( C 2 , F g –1 ) curves according to the eqs and , respectively: ,,,,, where i (A) is the current/discharge current, s (mV s –1 ) is the scan rate, Δ V (V) is the operational potential window, Δ t (s) is the discharge time, and m is the total mass of electrode material, which includes electroactive material, conducting carbon and binder.…”

Section: Methodsmentioning

confidence: 99%

Amorphous MnO_x Nanostructure/Multiwalled Carbon Nanotube Composites as Electrode Materials for Supercapacitor Applications

Keshari

Dubey

2022

ACS Appl. Nano Mater.

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Disordered nanostructures with abundant defects and porous microstructures have drawn tremendous interest in the energy storage application. Herein, a simple synthesis of amorphous MnO x nanostructures (AMO-S) is demonstrated by a redox reaction between carbon dots (CD-S, derived from sucrose via hydrothermal method) and KMnO 4 at room temperature. The obtained AMO-S displays a nanoparticulate/nanorod-like irregular morphology and mesoporous structure. Experimental observations illustrate that the presence of CD-S is essential for the precipitation of AMO-S under ambient conditions. Afterward, a small amount of multiwalled carbon nanotubes (MWCNTs) is incorporated before (in situ) and after (ex situ) the formation of AMO-S, which resulted in AMO/MWCNT-in and AMO/MWCNT-ex nanocomposites, respectively. Electrochemical tests of the synthesized materials are conducted to evaluate their charge storage characteristics. It is found that the AMO/MWCNT-in nanocomposite with a small MWCNT content (∼3.0 wt %) exhibits a high specific capacitance of 580.2 F g −1 at 1.0 A g −1 based on the total mass of electrode material, promising rate capability (57.1% retention after 6-fold increase in the current density), and high cycling stability (96.9% @ 3000 charge−discharge cycles at 1.0 A g −1 ). The excellent electrochemical performance of the AMO/MWCNT-in electrode is mainly attributed to the better intermixing of two components along with the synergistic contributions of CD-S, resulting in a high electronic conductivity, fast ion diffusion ability, abundant electroactive sites, and mesoporosity. Moreover, the assembled aqueous AMO/MWCNT-in//activated carbon asymmetric supercapacitor can work properly in a significantly large potential window of 0−2.2 V, which delivers a high specific capacitance (76.2 F g −1 @ 1.0 A g −1 ) and excellent energy density (51.2 Wh kg −1 ) at a power density of 1100 W kg −1 . This study suggests that the in situ incorporation of a small amount of MWCNTs may be an effective approach to improve the energy storage ability of pseudocapacitive AMO-S.

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“…Carbonaceous materials have excellent electrical conductivity and stability with large surface area [ 31 , 32 ]. Carbon nanotubes [ 109 , 110 ], graphene [ 111 , 112 ], carbon nanowires [ 113 , 114 ], carbon nanofibers [ 115 ], and other carbon materials can be used as scaffolds for depositing MnO 2 nanostructures. Large surface area with a great quantity of active sites is provided and the contact path between electrode materials and electrolytes is shortened, which enhances electrochemical properties [ 116 ].…”

Section: Tmos-based Electrode Materialsmentioning

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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Facile co-deposition of the carbon nanotube@MnO2 heterostructure for high-performance flexible supercapacitors

Cited by 42 publications

References 46 publications

Mn₁₃-Cluster-Based Nanowire Arrays Deposited on Ni Foam for the Oxygen Evolution Reaction

Mn₁₃-Cluster-Based Nanowire Arrays Deposited on Ni Foam for the Oxygen Evolution Reaction

Amorphous MnO_x Nanostructure/Multiwalled Carbon Nanotube Composites as Electrode Materials for Supercapacitor Applications

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

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Facile co-deposition of the carbon nanotube@MnO2 heterostructure for high-performance flexible supercapacitors

Cited by 42 publications

References 46 publications

Mn13-Cluster-Based Nanowire Arrays Deposited on Ni Foam for the Oxygen Evolution Reaction

Mn13-Cluster-Based Nanowire Arrays Deposited on Ni Foam for the Oxygen Evolution Reaction

Amorphous MnOx Nanostructure/Multiwalled Carbon Nanotube Composites as Electrode Materials for Supercapacitor Applications

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

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Mn₁₃-Cluster-Based Nanowire Arrays Deposited on Ni Foam for the Oxygen Evolution Reaction

Mn₁₃-Cluster-Based Nanowire Arrays Deposited on Ni Foam for the Oxygen Evolution Reaction

Amorphous MnO_x Nanostructure/Multiwalled Carbon Nanotube Composites as Electrode Materials for Supercapacitor Applications