期刊
ELECTROCHIMICA ACTA
卷 54, 期 2, 页码 403-409出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2008.07.057
关键词
Vanadium mononitride; Lithium-ion batteries; Anode materials
资金
- National Nature Science Foundation of China [20773031]
- 973 Projects [2007CB209702]
- 863 Projects [2007AA03Z322]
Vanadium mononitride (VN) thin films have been successfully fabricated by magnetron sputtering. Its electrochemical behaviour with lithium was examined by galvanostatic cell cycling and cyclic voltammetry. The capacity of VN was found to be stable above 800 mAh g(-1) after 50 cycles. By using ex situ X-ray diffraction, high-resolution transmission electron microscopy and selected area electron diffraction as well as in situ spectroelectrochemical measurements, the electrochemical reaction mechanism of VN with lithium was investigated. The reversible conversion reaction of VN into metal V and Li3N was revealed. The high reversible capacity and good stable cycle of VN thin film electrode made it a new promising lithium-ion storage material for future rechargeable lithium batteries. (c) 2008 Elsevier Ltd. All rights reserved.
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