标题：Facile Synthesis of Mn3O4Nanoplates-Anchored Graphene Microspheres and Their Applications for Supercapacitors
作者：Tian, Yangyang ;Li, Dongwei ;Liu, Jinglei ;Wang, Hua ;Zhang, Junfeng ;Zheng, Yiqun ;Liu, Tonghao ;Hou, Shifeng
作者机构：[Tian, Yangyang ] School of Chemistry and Chemical Engineering, Shandong University, Jinan; Shandong Province; 250100, China;[Liu, Tonghao ] Jining Re 更多
摘要：We describe a facile synthesis of Mn3O4nanoplates (NPs)-anchored graphene microspheres (GSs) and their applications as electrode materials for supercapacitors. The use of GSs as substrate significantly improve the electrochemical performance of Mn3O4, which can be attributed to unique spherical structure of graphene and excellent stability and anti-reunion of Mn3O4NPs. The success of this synthesis depends on the in situ reduction of Mn cations by carbon from GSs under hydrothermal conditions. The resultant Mn3O4NPs with an average thickness of 37 nm were uniformly distributed on the surface of GSs. Material characterizations, including XRD, Raman, FTIR and XPS, have been performed to confirm their shape, composition and structure. As a positive material, the as-prepared Mn3O4NPs/GSs composites exhibited excellent electrochemical property in a three-electrode system. In particular, their specific capacitance reached as high as 317 F g−1at a scan rate of 10 mV s−1, and a remarkable stability (about 100% retention of its initial capacitance) was achieve after 4000 galvanostatic charge-discharge cycles at the current density of 2 A g−1. Therefore, Mn3O4NPs/GSs can have been used as an electrode material for supercapacitors.
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