期刊
ELECTROCHIMICA ACTA
卷 92, 期 -, 页码 427-432出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.01.057
关键词
Molybdenum disulfide; Sodium ion battery; Electrochemistry; Mechanism; Room temperature
资金
- WCU [R32-20093]
- PRC [2008-2000068]
- Human Resource Training Project for Regional Innovation through the National Research Foundation (NRF)
- Ministry of Education, Science and Technology (MEST)
- [2012R1A2A2A02015831]
- [2012R1A2A1A01006546]
New emerging large scale battery market has demanded low cost and high power or energy density materials. Sodium (Na) is a promising candidate for an anode material because of its low cost and natural abundance. Also molybdenum disulfide (MoS2) is an attractive cathode material with layered structure. In this study a Na/MoS2 cell was assembled so as to evaluate its electrochemical properties as a rechargeable battery. In the first discharge Na/MoS2 cell showed two characteristic plateaus at 0.93 V and 0.8V. Galvanostatic charge/discharge cycle was carried out in different voltage ranges according to the discharge depths (0.85 V and 0.4V). The electrochemical behaviors of Na/MoS2 cells at each discharge depth were analyzed through characterization of the crystallographic changes by employing ex situ X-ray diffractometry (XRD) and transmission electron microscopy (TEM). Finally, Na/MoS2 reaction mechanism was suggested. (C) 2013 Elsevier Ltd. All rights reserved.
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