期刊
MATERIALS RESEARCH BULLETIN
卷 48, 期 7, 页码 2702-2706出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2013.03.033
关键词
Titanium niobate; Titanium tantalate; Electrochemical Li insertion; Shear ReO3 structure
TiNb2O7 and TiTa2O7 phases are synthesized by solid-state reaction method and are investigated for electrochemical Li insertion/extraction. The electrochemical insertion of Li in these phases is characterized by both solid solution and two-phase regimes. The structure is stable toward Li insertion/extraction. The first cycle discharge capacity values are 307 mAh g(-1) and 215 mAh g(-1) in the voltage range of 3.0-1.0 V for TiNb2O7 and TiTa2O7 phases, respectively. The discharge capacities of TiNb2O7 and TiTa2O7 are 212 mAh g(-1) and 100 mAh g(-1), respectively, after 20 cycles. (C) 2013 Published by Elsevier Ltd.
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