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Electrochemical capacitors (ECs) that store charge based on the pseudocapacitive mechanism combine high energy densities with high power densities and rate capabilities. 2D transition metal carbides (MXenes) have been recently introduced as high‐rate pseudocapacitive materials with ultrahigh areal and volumetric capacitances. So far, 20 different MXene compositions have been synthesized and many more...
In article number 1806931, flexible and freestanding films of 2D vanadium carbide MXene (V2CTx) are prepared by Majid Beidaghi and co‐workers and used as pseudocapacitive electrodes. The assembled films show excellent chemical and electrochemical stability in contrast to delaminated 2D V2CTx sheets, which rapidly oxidize in ambient conditions. The electrodes show exceptional high‐rate pseudocapacitive...
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