Journal ArticleDOI
Supercapacitor Behavior with KCl Electrolyte
Hee Y. Lee,John B. Goodenough +1 more
TLDR
Amorphous MnO2·nH2O in a mild 2 M KCl aqueous electrolyte proves to be an excellent electrode for a faradaic electrochemical capacitor cycled between −0.2 and +1.0 V versus SCE.About:
This article is published in Journal of Solid State Chemistry.The article was published on 1999-04-01. It has received 1006 citations till now. The article focuses on the topics: Electrolyte & Cyclic voltammetry.read more
Citations
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Materials for electrochemical capacitors
TL;DR: This work has shown that combination of pseudo-capacitive nanomaterials, including oxides, nitrides and polymers, with the latest generation of nanostructured lithium electrodes has brought the energy density of electrochemical capacitors closer to that of batteries.
Journal ArticleDOI
A review of electrode materials for electrochemical supercapacitors
TL;DR: Two important future research directions are indicated and summarized, based on results published in the literature: the development of composite and nanostructured ES materials to overcome the major challenge posed by the low energy density.
Journal ArticleDOI
Pseudocapacitive oxide materials for high-rate electrochemical energy storage
TL;DR: In this article, the pseudocapacitance properties of transition metal oxides have been investigated and a review of the most relevant pseudo-capacitive materials in aqueous and non-aqueous electrolytes is presented.
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Carbon Materials for Chemical Capacitive Energy Storage
TL;DR: In order to further improve the power and energy densities of the capacitors, carbon-based composites combining electrical double layer capacitors (EDLC)-capacitance and pseudo-Capacitance have been explored and show not only enhanced capacitance, but as well good cyclability.
Journal ArticleDOI
A review of electrolyte materials and compositions for electrochemical supercapacitors
TL;DR: The principles and methods of designing and optimizing electrolytes for ES performance and application are highlighted through a comprehensive analysis of the literature, and challenges in producing high-performing electrolytes are analyzed.
References
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Journal ArticleDOI
Transition from “Supercapacitor” to “Battery” Behavior in Electrochemical Energy Storage
TL;DR: The transition between battery and supercapacitor behavior arising from a range of degrees of oxidation/reduction that arise over an appreciable range of potentials is discussed in this article.
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Hydrous Ruthenium Oxide as an Electrode Material for Electrochemical Capacitors
TL;DR: In this article, the crystalline structure and the electrochemical properties of the hydrous ruthenium oxide powder have been studied as a function of the annealing temperature.
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Keggin-type heteropolyacids as electrode materials for electrochemical supercapacitors
TL;DR: In this article, an asymmetric configuration of an inexpensive electrochemical capacitance system with a proton-exchange polymer membrane was demonstrated. Butt et al. showed that a very reversible specific capacitance of 112 F/g and an energy density of 36 J/g, based on the active materials only, were measured for the optimized cold-pressed single cell with an operating voltage of 0.8 V.