Issue 5, 2014

Pseudocapacitive oxide materials for high-rate electrochemical energy storage

Abstract

Electrochemical energy storage technology is based on devices capable of exhibiting high energy density (batteries) or high power density (electrochemical capacitors). There is a growing need, for current and near-future applications, where both high energy and high power densities are required in the same material. Pseudocapacitance, a faradaic process involving surface or near surface redox reactions, offers a means of achieving high energy density at high charge–discharge rates. Here, we focus on the pseudocapacitive properties of transition metal oxides. First, we introduce pseudocapacitance and describe its electrochemical features. Then, we review the most relevant pseudocapacitive materials in aqueous and non-aqueous electrolytes. The major challenges for pseudocapacitive materials along with a future outlook are detailed at the end.

Graphical abstract: Pseudocapacitive oxide materials for high-rate electrochemical energy storage

Article information

Article type
Review Article
Submitted
24 Dec 2013
Accepted
13 Mar 2014
First published
13 Mar 2014

Energy Environ. Sci., 2014,7, 1597-1614

Pseudocapacitive oxide materials for high-rate electrochemical energy storage

V. Augustyn, P. Simon and B. Dunn, Energy Environ. Sci., 2014, 7, 1597 DOI: 10.1039/C3EE44164D

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