Studies on electrochemical lithium insertion in isostructural titanium niobate and tantalate phases with shear ReO{sub 3} structure

Journal Article · Mon Jul 15 00:00:00 EDT 2013 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2013.03.033· OSTI ID:22290482

Saritha, D.

Graphical abstract: - Highlights: • Electrochemical lithium insertion into ReO{sub 3} type phases TiNb{sub 2}O{sub 7}, TiTa{sub 2}O{sub 7} is feasible. • TiNb{sub 2}O{sub 7} exhibits good cycling behavior and high reversible capacity of 212 mAh g{sup −1}. • TiTa{sub 2}O{sub 7} exhibits reversible capacity of 100 mAh g{sup −1}. - Abstract: TiNb{sub 2}O{sub 7} and TiTa{sub 2}O{sub 7} 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{sup −1} and 215 mAh g{sup −1} in the voltage range of 3.0–1.0 V for TiNb{sub 2}O{sub 7} and TiTa{sub 2}O{sub 7} phases, respectively. The discharge capacities of TiNb{sub 2}O{sub 7} and TiTa{sub 2}O{sub 7} are 212 mAh g{sup −1} and 100 mAh g{sup −1}, respectively, after 20 cycles.

• OSTI ID: 22290482
• Journal Information: Materials Research Bulletin, Vol. 48, Issue 7; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CAPACITY
ELECTROCHEMISTRY
LITHIUM
NIOBATES
RHENIUM OXIDES
SOLID SOLUTIONS
TITANIUM