Electrochemical study of aqueous asymmetric FeWO4/MnO2 supercapacitor

Goubard‐Bretesché, Nicolas; Crosnier, Olivier; Buvat, Gaëtan; Favier, Frèdéric; Brousse, Thierry

doi:10.1016/j.jpowsour.2016.04.075

Cited by 63 publications

(31 citation statements)

References 28 publications

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“…[119] This cell stored charge in a voltage range of 1.4 V and displayed specific capacitance of 8 F g −1 , stable charge and discharge over 35 000 cycles, good Coulombic efficiency (nearly 100% over 35 000 cycles), low leakage current, and low self-discharge rate. When using pseudocapacitive materials for both electrodes in asymmetric cells, their fast kinetic redox reactions can provide simultaneously high power response and high energy density.…”

Section: Metal Oxide/hydroxide||metal Oxide/hydroxide Supercapacitorsmentioning

confidence: 95%

Metal Oxide and Hydroxide–Based Aqueous Supercapacitors: From Charge Storage Mechanisms and Functional Electrode Engineering to Need‐Tailored Devices

2019

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Energy storage devices that efficiently use energy, in particular renewable energy, are being actively pursued. Aqueous redox supercapacitors, which operate in high ionic conductivity and environmentally friendly aqueous electrolytes, storing and releasing high amounts of charge with rapid response rate and long cycling life, are emerging as a solution for energy storage applications. At the core of these devices, electrode materials and their assembling into rational configurations are the main factors governing the charge storage properties of supercapacitors. Redox‐active metal compounds, particularly oxides and hydroxides that store charge via reversible valence change redox reactions with electrolyte ions, are prospective candidates to optimize the electrochemical performance of supercapacitors. To address this target, collaborative investigations, addressing different streams, from fundamental charge storage mechanisms and electrode materials engineering to need‐tailored device assemblies, are the key. Over the last few years, significant achievements in metal oxide and hydroxide–based aqueous supercapacitors have been reported. This work discusses the most recent achievements and trends in this field and brings into the spotlight the authors' viewpoints.

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Section: Metal Oxide/hydroxide||metal Oxide/hydroxide Supercapacitorsmentioning

confidence: 95%

Metal Oxide and Hydroxide–Based Aqueous Supercapacitors: From Charge Storage Mechanisms and Functional Electrode Engineering to Need‐Tailored Devices

2019

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“…So that the mass loading ratio of positive and negative electrodes should be determined after getting the three electrodes capacitance (C) and voltage range (∆V), and the cell mass loading is about 6 mg cm -2 [5]. The ASCs are fabricated by 2025 coin type full cells with nickel foam electric collectors, cellulose paper separators and neutral or alkaline aqueous solution electrolyte [6]. Each cell is left to stay overnight before the test.…”

Section: Methodsmentioning

confidence: 99%

“…This kind of MnO 2 was made by hydrothermal method with the reaction of KMnO 4 and MnCl 2 . Commercially available cryptomelane-type α-MnO 2 was used as positive electrode material in Olivier Crosnier's research on FeWO 4 [6]. This kind of MnO 2 shows 100 F g -1 electrode specific capacitance in 5 M LiNO 3 .It is well known that the theoretical specific capacitance value of MnO 2 is 1233 F g −1 .…”

Section: Mno 2 Materialsmentioning

confidence: 99%

Manganese-Containing Supercapacitors for Future Energy Storage

Li¹,

Zhang²,

Li³

2018

dteees

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Due to the fast developing demand for storing new energy, as well as the practical need of the growing smart grid technologies, many researchers engage in nanoparticles to explore their energy storage potential. Supercapacitors become very popular in the past two decades for their high power density and long-term cycling stability. Manganese-containing electrode materials show many advantages in asymmetric supercapacitor devices. In this review, we will both provide a facile practice of building asymmetric supercapacitors in the lab and list some latest results in the field of Mn-containing electrode materials and find out the challenges that still lie there. From the review work, we hope to attract more material and energy system researchers to pay attention to these materials, make our contribution together and bring a brighter future to energy storage.

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“…[77] To overcome this problem, redox-activematerials, such Reviews as metal oxides [78,79] and conducting polymers, [80,81] presenting high pseudocapacitance were widely studied for incorporation into EDLC-type carbon materials. However, the major challengeo fc arbon-baseds upercapacitors is their low energy density due to the EDLC storagem echanism.…”

Section: Hybridization With Pseudocapacitive Materialsmentioning

confidence: 99%

Advanced Functional Carbons and Their Hybrid Nanoarchitectures towards Supercapacitor Applications

Young

Park

et al. 2018

ChemSusChem

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Porous carbons have attracted much attention as electrode materials for supercapacitors due to their enormous surface area, high electrical conductivity, excellent corrosion resistance, high temperature stability, and relatively low cost. The design of porous architectures is considered key for determining electrochemical performance. Pore size distribution, pore size, and pore connectivity strongly affect electrochemical performance. Various carbon materials with pore size ranging from micro- to macropores were extensively studied. Herein, various types of porous carbon-based and hybrid materials from different approaches and their electrochemical applications are summarized. Appropriate tuning of the pore size of carbon materials is essential for ensuring good transport of ions with different sizes throughout the electrolyte, so that the electrode materials can be fully utilized. Many carbon materials were produced from a series of carbonization and activation processes that possess controllable pore structures, including activated carbons, graphite, carbon nanotubes, carbon aerogels, and templated porous carbons. Templated carbon materials were prepared by various approaches, such as direct carbonization from carbon precursors and soft- and hard-template methods. To enhance the electrochemical performance of the electrode materials, heteroatoms, such as nitrogen, sulfur, and boron, were doped into porous carbons. In addition, to optimize the overall capacitance without destroying the stability and morphology of electrode materials, pseudocapacitive materials, such as transition-metal oxides, were introduced into the carbon frameworks. In this review, recent advances in the fabrication of nanoarchitectured porous carbons and metal oxides through various approaches for supercapacitor applications are summarized.

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Electrochemical study of aqueous asymmetric FeWO4/MnO2 supercapacitor

Cited by 63 publications

References 28 publications

Metal Oxide and Hydroxide–Based Aqueous Supercapacitors: From Charge Storage Mechanisms and Functional Electrode Engineering to Need‐Tailored Devices

Metal Oxide and Hydroxide–Based Aqueous Supercapacitors: From Charge Storage Mechanisms and Functional Electrode Engineering to Need‐Tailored Devices

Manganese-Containing Supercapacitors for Future Energy Storage

Advanced Functional Carbons and Their Hybrid Nanoarchitectures towards Supercapacitor Applications

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