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Cycle stability of MnO 2 ·nH 2 O electrochemical capacitors (ECs) has been studied by using galvanostatic tests and electrochemical impedance spectroscopy (EIS). The extent of capacity fading, ranging from 5 to 30% in 1000 cycles, increases with current-rate, and is markedly reduced with increasing binder content. Two fading mechanisms have been identified. With low binder content,...
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