期刊
JOURNAL OF POWER SOURCES
卷 237, 期 -, 页码 52-57出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2013.03.006
关键词
Sodium secondary battery; NaCrO2; Positive electrode; Structural analysis; Ionic liquid; Bis(fluorosulfonyl)amide
资金
- Japan Society for the Promotion of Science (JSPS) [20246140]
- Advanced Low Carbon Technology Research and Development Program (ALCA) of the Japan Science and Technology Agency (JST)
- Grants-in-Aid for Scientific Research [20246140] Funding Source: KAKEN
The electrochemical performance of NaCrO2 as a positive electrode material for an intermediate-temperature sodium secondary battery was evaluated in an inorganic ionic liquid, NaFSA-KFSA (FSA = bis(fluorosulfonyl)amide), at 363 K. The positive electrode using NaCrO2, acetylene black, and polytetrafluoroethylene exhibited a stable discharge capacity of 113 mA h g(-1) at a current density of 125 mA g(-1). The Coulombic efficiency and the capacity retention at the 100th cycle were 99.6% and 98.5%, respectively. Even at the very high current density of 2000 mA g(-1), the discharge capacity was maintained at 63 mA h g(-1). X-ray diffraction analyses revealed that the deintercalation of Na+ ion from NaCrO2 was associated with several phase transitions in the following sequence: rhombohedral O3, monoclinic O'3, and monoclinic P'3. (C) 2013 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