Controlled synthesis of hierarchical birnessite-type MnO 2 nanoflowers for supercapacitor applications

• DOI: 10.1016/j.apsusc.2015.08.037
• Publication Date: 2015-08-08T12:05:40Z
• Authors: Shuoqing Zhao; Tianmo Liu; Dewen Hou; Wen Zeng; Bin Miao; Shahid Hussain; Xianghe Peng; Muhammad Sufyan J...
• Keywords: Birnessite; Nanoflower

Abstract Birnessite-type MnO 2 nanoflowers assembled by hierarchical nanosheets were successfully synthesized via a facile and simple hydrothermal process. The ration of reactants is a critical factor affects formation process of MnO 2 nanoflowers. The electrochemical test of the as-synthesized birnessite-type MnO 2 exhibits excellent electrochemical property with ideal voltammetry behavior, high specific capacitance (197.3 F g −1 at 1 A g −1 ) and superior cycling stability (only 5.4% capacitance loss after 1000 cycling test). The distinct hierarchical nanostructure and impressive electrochemical performances suggest the birnessite-type MnO 2 is a promising material for supercapacitor applications.