Mn doped Co(OH)_2 nanosheets as electrode materials for high performance supercapacitors

摘要

Two-dimensional (2D) nanomaterials have great potential in supercapacitors (SCs). Herein, we reported for first synthesis of Mn doped Co(OH)(2) nanosheets via a hydrothermal decomposition of a mixed aqueous solution of MnCl2 center dot 6H(2)O, CoCl2 center dot 6H(2)O and CO(NH2)(2) at 200 degrees C for 6 h without using any template or surfactant. The synergetic effect of unique 2D structure and Mn doping is favorable for electron transportation and ion penetration. The Mn doped Co(OH)(2) nanosheets-based electrode displayed a high specific capacitance of 1915.88 F.g(-1) at 1.0 A.g(-1) and superior cycle performance of 93.5% capacitance retention over 5,000 charge-discharge cycles at 10.0 A.g(-1). The present synthetic route provides a simple and facile method for large-scale production of Mn doped Co(OH)(2) nanosheets for electrochemical energy storage. (C) 2020 Elsevier B.V. All rights reserved.