Lithium insertion into hollandite-type TiO{sub 2}.

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Hollandite-type TiO{sub 2} compounds, isostructural with {alpha}-MnO{sub 2}, have been investigated as insertion electrodes for lithium batteries. Parent materials of K{sub x}Ti{sub 8}O{sub 16} (0 < x < 2) were treated with concentrated acid to yield TiO{sub 2} products that were essentially free of potassium. Lithium can be inserted into the (2 x 2) tunnels of the TiO{sub 2} structure chemically (with n-butyllithium) and electrochemically to an approximate composition Li{sub 0.5}TiO{sub 2}. The lithium ions can be easily removed from the lithiated structure by chemical reaction with bromine; cyclic voltammetry indicates that high voltages are required to remove the lithium ... continued below

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18 p.

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Noailles, L. D. September 2, 1998.

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Description

Hollandite-type TiO{sub 2} compounds, isostructural with {alpha}-MnO{sub 2}, have been investigated as insertion electrodes for lithium batteries. Parent materials of K{sub x}Ti{sub 8}O{sub 16} (0 < x < 2) were treated with concentrated acid to yield TiO{sub 2} products that were essentially free of potassium. Lithium can be inserted into the (2 x 2) tunnels of the TiO{sub 2} structure chemically (with n-butyllithium) and electrochemically to an approximate composition Li{sub 0.5}TiO{sub 2}. The lithium ions can be easily removed from the lithiated structure by chemical reaction with bromine; cyclic voltammetry indicates that high voltages are required to remove the lithium by electrochemical methods. The poor electrochemical behavior of hollandite-TiO{sub 2} contrasts strongly with {alpha}-MnO{sub 2} electrodes. The superior properties of {alpha}-MnO{sub 2} electrodes are attributed to the presence of oxygen ions, either as H{sub 2}O or Li{sub 2}O, in the (2 x 2) channels; lithia-stabilized electrodes, 0.15Li{sub 2}O {center_dot} -MnO{sub 2}, show good cycling behavior and a rechargeable capacity of approximately 180 mAh/g.

Physical Description

18 p.

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OSTI as DE00010948

Medium: P; Size: 18 pages

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  • 9th International Meeting on Lithium Batteries, Edinburgh (GB), 07/12/1998--07/17/1998

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  • Report No.: ANL/CMT/CP-97207
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 10948
  • Archival Resource Key: ark:/67531/metadc625920

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • September 2, 1998

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • April 7, 2017, 4:09 p.m.

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Noailles, L. D. Lithium insertion into hollandite-type TiO{sub 2}., article, September 2, 1998; Illinois. (digital.library.unt.edu/ark:/67531/metadc625920/: accessed October 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.