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Issue 36, 2018
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Ultrathin Cu-MOF@δ-MnO2 nanosheets for aqueous electrolyte-based high-voltage electrochemical capacitors

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Abstract

With increasing demand for energy storage, obtaining aqueous electrolytes that are incombustible, low cost, and conveniently assembled in air with high ionic conductivity has become a dominant focus. Herein, we report the successful synthesis of ultrathin Cu-MOF@δ-MnO2 nanosheets in a controllable way for 2.0 V aqueous electrolyte-based electrochemical capacitors that involve activated carbon. From electrochemical performance tests, the electrode results in a large increase in the performance of an asymmetric supercapacitor, which involves activated carbon, in an operating voltage window from 0 V to 2.0 V in aqueous electrolyte, with a high specific capacitance of 340 F g−1 at a current density of 1.0 A g−1, and cycling stability for 6000 cycles with only a 5% drop in the initial capacitance. The superior performance during the charging–discharging process is attributed to the existence of a film, which can prevent electronic conduction while allowing ionic conduction.

Graphical abstract: Ultrathin Cu-MOF@δ-MnO2 nanosheets for aqueous electrolyte-based high-voltage electrochemical capacitors

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Publication details

The article was received on 21 Jun 2018, accepted on 01 Aug 2018 and first published on 30 Aug 2018


Article type: Communication
DOI: 10.1039/C8TA05976D
J. Mater. Chem. A, 2018,6, 17329-17336

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    Ultrathin Cu-MOF@δ-MnO2 nanosheets for aqueous electrolyte-based high-voltage electrochemical capacitors

    J. Xu, Y. Wang, S. Cao, J. Zhang, G. Zhang, H. Xue, Q. Xu and H. Pang, J. Mater. Chem. A, 2018, 6, 17329
    DOI: 10.1039/C8TA05976D

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