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Lithium Intercalation in Nanoporous Anatase TiO2 Studied with XPS

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Södergren, Sven, Siegbahn, Hans, Rensmo, Håkan, Lindström, Henrik, Hagfeldt, Anders, Lindquist, Sten-Eric·1997·The Journal of Physical Chemistry B

Abstract

Intercalation of lithium ions in nanoporous anatase TiO 2 was studied with XPS using a novel electrochemical preparation technique. The electrolyte was 0.5 M LiClO 4 in acetonitrile (not water-free). The electrochemical insertion of lithium ions creates reduced Ti ions (Ti 3+ ), which was observed as a new well-resolved state in the Ti 2p core level spectrum shifted 2.1 eV to lower binding energy. The new Ti 2p state was reversible when the electrode was deintercalated. Changes in the O 1s core spectra were also observed and discussed in terms of hydrated lithium ions in the Helmholtz layer, or formation of Li 2 O/LiOH.

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Authors
Södergren, S., Siegbahn, H., Rensmo, H., Lindström, H., Hagfeldt, A., & Lindquist, S.-E.
Venue
The Journal of Physical Chemistry B
Published
1997-04-01
Volume
101
Issue
16
Pages
3087-3090
ISSN
  • 1520-5207 (ISSN-L)
  • 1520-6106
OpenAlex
W2056689992
Cited by
241
References
0
FWCI
5.53
Type
journal article
Language
en
Open access
green

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