期刊
ELECTROCHIMICA ACTA
卷 176, 期 -, 页码 586-593出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2015.07.030
关键词
V2O5; sodium insertion; NaV2O5 bronze; Raman spectroscopy; sodium batteries
资金
- Agence Universitaire de la Francophonie (AUF)
- Vietnam National University, Ho Chi Minh City [B2011-08-01TD, HS2013-76-01]
In this work the electrochemical behavior of alpha-V2O5 at RT, in a 1 M NaClO4/PC (propylene carbonate) electrolyte is investigated for the first time. The irreversible formation of a sodiated layered compound is shown from the first electrochemical discharge step. This electrochemically formed compound, with highly stable structure close to that of the high temperature alpha'-NaV2O5 orthorhombic bronze, is demonstrated to be a genuine sodium intercalation compound. This material exhibits a high capacity of 120 mAh g(-1) available near 1.6 V at C/10 rate with a promising cycling behaviour. X-ray diffraction and Raman spectroscopy show zero strain structural behaviour during Na+ insertion/extraction in this large interlayer spacing material. (C) 2015 Elsevier Ltd. All rights reserved.
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