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Different metal cation-doped MnO2/carbon cloth for wide voltage energy storage by Xiaoyan Li; Xiaoping Lin; Na Yang; Xianghong Li; Wei Zhang; Sridhar Komarneni is a Chemistry article available to read on EtoBox.

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Aqueous gel supercapacitors, as an important component of flexible energy storage devices, have received widespread attention for their fast charging/discharging rates, long cycle life and high electrochemical stability under mechanical deformation condition. However, the low energy density of aqueous gel supercapacitors has greatly hindered their further development due to the narrow electrochemical window and limited energy storage capacity. Therefore, different metal cation-doped MnO2/carbon cloth-based flexible electrodes herein are prepared by constant voltage deposition and electrochemical oxidation in various saturated sulphate solutions. The influence of different metal cations as K+, Na+ and Li+ doping and deposition conditions on the apparent morphology, lattice structure and electrochemical properties are explored. Furthermore, the pseudo-capacitance ratio of the doped MnO2 and the voltage expansion mechanism of the composite electrode are investigated. The specific capacitance and pseudo-capacitance ratio of the optimized δ-Na0.31MnO2/carbon cloth as MNC-2 electrode could be reached 327.55 F/g at 10 mV/s and 35.56% of the pseudo-capacitance, respectively. The flexible s

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Author

Xiaoyan Li; Xiaoping Lin; Na Yang; Xianghong Li; Wei Zhang; Sridhar Komarneni

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Chemistry (Physical Sciences)