期刊
JOURNAL OF POWER SOURCES
卷 326, 期 -, 页码 522-532出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2016.07.026
关键词
Vanadium dioxides; Reduced graphene oxide; Cathode; Lithium; Sodium; Batteries
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology of Korea [NRF-2014R1A2A1A11051197]
- National Research Foundation of Korea - Korean government (MEST) [NRF-2015M3D1A1069713]
- Human Resources Development of the Korean Institute of Energy Technology Evaluation and Planning (KETEP) grant - Korean government Ministry of Trade, Industry Energy [20154030200630]
- KIST Institutional Program [2E26330]
- National Research Foundation of Korea [2014R1A2A1A11051197] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this study, a metastable form of vanadium dioxide, denoted as VO2(B), has been successfully synthesized under solvothermal condition. However, the as-received VO2(B) suffers from fast capacity fading and poor high-rate performance. In order to overcome these problems, the as-received VO2(B) is solvothermally treated with reduced graphene oxide (rGO) to produce VO2(B)/rGO composite. As a result, the resulting electric conductivity of the VO2(B)/rGO composite is improved to similar to 10(-4) cm S-1 (from similar to 10(-7) S cm(-1) for the as-received VO2(B)). Electrochemical data of the VO2(B)/rGO composite, tested in both Li and Na cells, shows markedly enhanced electrochemical performance compared to bare VO2(B). The effect of electro-conducting rGO is more evident at high rates. (C) 2016 Elsevier B.V. All rights reserved.
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