Vanadium dioxide – Reduced graphene oxide composite as cathode materials for rechargeable Li and Na batteries
- Authors
- Mahadi, Nurulhuda Binti; Park, Jae-Sang; Park, Jae-Ho; Chung, Kyung Yoon; Yi, Su Youl; Sun, Yang-Kook; Myung, Seung-Taek
- Issue Date
- Sep-2016
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Vanadium dioxides; Reduced graphene oxide; Cathode; Lithium; Sodium; Batteries
- Citation
- JOURNAL OF POWER SOURCES, v.326, pp.522 - 532
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF POWER SOURCES
- Volume
- 326
- Start Page
- 522
- End Page
- 532
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/5517
- DOI
- 10.1016/j.jpowsour.2016.07.026
- ISSN
- 0378-7753
- 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 ∼10−4 cm S−1 (from ∼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.
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