Vanadium dioxide - Reduced graphene oxide composite as cathode materials for rechargeable Li and Na batteries

Title
Vanadium dioxide - Reduced graphene oxide composite as cathode materials for rechargeable Li and Na batteries
Author
선양국
Keywords
Vanadium dioxides; Reduced graphene oxide; Cathode; Lithium; Sodium; Batteries
Issue Date
2016-09
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF POWER SOURCES, v. 326, Page. 522-532
Abstract
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.
URI
https://www.sciencedirect.com/science/article/pii/S0378775316308825?via%3Dihubhttp://repository.hanyang.ac.kr/handle/20.500.11754/80303
ISSN
0378-7753; 1873-2755
DOI
10.1016/j.jpowsour.2016.07.026
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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