期刊
JOURNAL OF POWER SOURCES
卷 281, 期 -, 页码 44-48出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2015.01.155
关键词
Manganese oxide; Graphene; Electrochemical capacitor; Environmentally benign; Specific capacitance; Cycling stability
资金
- National Research Foundation of Korea (NRF) - Korea government (MEST) [2012R1A2A2A01004416, 2013R1A1A2A10008031, 2014R1A5A1009799]
- Leaders Industry-University Cooperation (LINC) Project - Ministry of Education
- Advanced Manufacturing Technology Center (ATC) [10039034]
- National Research Foundation of Korea [2013R1A1A2A10008031] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
We develop a direct and environmentally benign method to prepare manganese oxide (Mn3O4)/graphene composites via one-step hydrothermal synthesis from graphite without using strong acids and toxic reducing agents. Structural and morphological analyses reveals that the irregularly shaped Mn3O4 nanoparticles are well-dispersed on the graphene flakes. Cyclic voltammetry and galvanostatic charge discharge tests indicate that the charge-storing mechanism of the Mn3O4/graphene composites is pseudocapacitive. The Mn3O4/graphene composite exhibits a specific capacitance of 367 F/g at a current density of 5 A/g. After 3000 charge discharge cycles, the Mn3O4/graphene electrode retains 91.8% of its initial specific capacitance. From electrochemical impedance spectra, it is evident that the changes in both the equivalent series resistance and charge-transfer resistance of the Mn3O4/graphene electrode before and after 3000 charge discharge cycles are small, indicating good cycling and electrochemical stability of the Mn3O4/graphene electrode. (C) 2015 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据