2014年1月
Pyrophosphate Na2FeP2O7 as a low-cost and high-performance positive electrode material for sodium secondary batteries utilizing an inorganic ionic liquid
JOURNAL OF POWER SOURCES
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- 巻
- 246
- 号
- 開始ページ
- 783
- 終了ページ
- 787
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.jpowsour.2013.08.027
- 出版者・発行元
- ELSEVIER SCIENCE BV
The electrochemical performance of a Na2FeP2O7 positive electrode has been evaluated in an inorganic ionic liquid NaFSA-KFSA (FSA = bis(fluorosulfonyl)amide) at 363 K. The electrode delivers a reversible capacity of 91 mAh g(-1) with excellent rate capability (59 mAh g(-1) at 2000 mA g(-1)) and a capacity retention of 91% over 1000 cycles, which facilitates the development of low-cost and high-safety sodium secondary batteries for large-scale energy storage applications. The average oxidation state of iron increases upon sodium extraction, as evidenced by the edge shift of an X-ray absorption spectroscopy analysis. According to an extended X-ray absorption fine structure analysis, the sodium extraction is accompanied by a shortening of Fe-O bonds. (C) 2013 Elsevier B.V. All rights reserved.
- リンク情報
- ID情報
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- DOI : 10.1016/j.jpowsour.2013.08.027
- ISSN : 0378-7753
- eISSN : 1873-2755
- ORCIDのPut Code : 48252119
- Web of Science ID : WOS:000326661100098