Electrical-energy storage has become one of the most critical areas of technological research. Electrochemical capacitors, also known as supercapacitors or ultracapacitors, are devices for rapid and highly efficient energy storage via interfacial ion electrosorption and fast redox reactions. F. Béguin and co-workers summarize on page 2219 the state of the art on carbon materials and electrolytes used in this technology and present current and foreshadowing developments in a comprehensive review article.
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Béguin et al. (2014) studied this question.