2014年8月
Na2MnSiO4 as a positive electrode material for sodium secondary batteries using an ionic liquid electrolyte
ELECTROCHEMISTRY COMMUNICATIONS
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- ,
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- 巻
- 45
- 号
- 開始ページ
- 63
- 終了ページ
- 66
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.elecom.2014.05.017
- 出版者・発行元
- ELSEVIER SCIENCE INC
Sodium manganese orthosilicate, Na2MnSiO4, was synthesized by a sol-gel method and investigated for use as a positive electrode material for Na secondary batteries using Na[FSA]-[C(3)C(1)pyrr][FSA] (FSA = bis(fluorosulfonyl) amide anion and C(3)C(1)pyrr = N-methyl-N-propylpyrrolidinium cation) ionic liquid electrolyte in the temperature range 298-363 K. Carbon coating and elevation of operational temperatures significantly improved the electrode performance. A reversible capacity of 125 mAh g(-1) (90% of the theoretical value based on a one-electron transfer process) was found at a rate of C/10 (13.9 mA g(-1)) within 2.0-4.0 V at 363 K, with an acceptably high rate capability. Na2MnSiO4 became amorphous upon the electrochemical removal of sodium, exhibiting a similar behavior as its lithium equivalent. Both Na2MnSiO4 and its desodiated form (Na0.8MnSiO4) possess remarkable thermal stability, suggesting their safety characteristic. (C) 2014 Elsevier B.V. All rights reserved.
- リンク情報
- ID情報
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- DOI : 10.1016/j.elecom.2014.05.017
- ISSN : 1388-2481
- eISSN : 1873-1902
- ORCIDのPut Code : 48252118
- Web of Science ID : WOS:000339035700016