Journal ArticleDOI
Electrochemical Characterization of a Hybrid Capacitor with Zn and Activated Carbon Electrodes
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TLDR
In this paper, a hybrid capacitor with an aqueous electrolyte solution was assembled using a Zn negative electrode and an activated carbon (AC) positive electrode, and the electrochemical properties of the HC were compared with an electric double layer capacitor (EDLC) having two AC electrodes.Abstract:
A hybrid capacitor (HC) with an aqueous electrolyte solution was assembled using a Zn negative electrode and an activated carbon (AC) positive electrode. The electrochemical properties of the HC were compared with an electric double-layer capacitor (EDLC) having two AC electrodes. The HC cell successfully functioned as an electrochemical capacitor, with a maximum operating voltage of 1.4 V, which was 1.5 times higher than that of the EDLC cell, and a specific capacitance of ca. 3.7 times higher than that of the EDLC cell. In addition, the HC cell displayed high-rate dischargeability comparable to that of the EDLC cell. Due to these advantages, the HC cell was found to be superior to the EDLC cell in terms of energy and power density. The HC could be a promising candidate for water-based electrochemical capacitors with high energy and power densities.read more
Citations
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A review on recent advances in hybrid supercapacitors: Design, fabrication and applications
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Electrode materials for aqueous asymmetric supercapacitors
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Journal ArticleDOI
Hierarchical porous nickel oxide and carbon as electrode materials for asymmetric supercapacitor
TL;DR: In this article, an asymmetric supercapacitor is constructed using hierarchical porous electrode materials of nickel oxide and carbon with the aim to facilitate ion transport, and the capacitance, energy density and power density of the asymmetric SuperCapACitor can be improved by elevating the supercapACitor voltage, and cycling stability decays at high voltage, but the columbic efficiency stays close to 100%.
Journal ArticleDOI
A novel zinc-ion hybrid supercapacitor for long-life and low-cost energy storage applications
TL;DR: In this paper, a Zn-ion based hybrid supercapacitor (Zn-HSC) was proposed to achieve high energy density with low cost by using Zn foil as both anode and current collector and bio-carbon derived porous material as the cathode.
References
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Journal ArticleDOI
An Asymmetric Hybrid Nonaqueous Energy Storage Cell
TL;DR: In this paper, a nonaqueous asymmetric electrochemical cell technology is presented where the positive electrode stores charge through a reversible nonfaradaic or pseudocapacitive reaction of anions on the surface of an activated carbon positive electrode.
Journal ArticleDOI
Optimisation of an asymmetric manganese oxide/activated carbon capacitor working at 2 V in aqueous medium
TL;DR: In this article, the charge storage mechanism of manganese oxide and activated carbon has been studied in aqueous medium in order to optimise an asymmetric (or hybrid) supercapacitor based on these two materials as positive and negative electrode, respectively.
Journal ArticleDOI
The Secondary Alkaline Zinc Electrode
F. R. McLarnon,Elton J. Cairns +1 more
TL;DR: There has been a worldwide effort to develop a long-lived secondary alkaline zinc electrode, and marked improvements in cell life-time have resulted as discussed by the authors, paying particular attention to research and development during the period 1975-1990.
Journal ArticleDOI
A Hybrid Activated Carbon-Manganese Dioxide Capacitor using a Mild Aqueous Electrolyte
TL;DR: In this article, a hybrid electrochemical capacitor using MnO 2 and activated carbon (AC) as positive and negative electrodes, respectively, was designed and individually tested in a mild aqueous electrolyte (0.65 M K 2 SO 4 ) in order to define the adequate balance of active material in the capacitor as well as the working voltage.
Journal ArticleDOI
Use of KCl Aqueous Electrolyte for 2 V Manganese Oxide/Activated Carbon Hybrid Capacitor
TL;DR: In this paper, a hybrid capacitor in neutral KCl aqueous electrolyte, which consists of amorphous manganese oxide (a-MnO 2.nH 2 O) as a cathode and activated carbon as an anode, was reported.