In:
Angewandte Chemie International Edition, Wiley, Vol. 53, No. 40 ( 2014-09-26), p. 10654-10657
Abstract:
The lithiation/de‐lithiation behavior of a ternary oxide (Li 2 MO 3 , where M=Mo or Ru) is examined. In the first lithiation, the metal oxide (MO 2 ) component in Li 2 MO 3 is lithiated by a conversion reaction to generate nano‐sized metal (M) particles and two equivalents of Li 2 O. As a result, one idling Li 2 O equivalent is generated from Li 2 MO 3 . In the de‐lithiation period, three equivalents of Li 2 O react with M to generate MO 3 . The first‐cycle Coulombic efficiency is theoretically 150 % since the initial Li 2 MO 3 takes four Li + ions and four electrons per formula unit, whereas the M component is oxidized to MO 3 by releasing six Li + ions and six electrons. In practice, the first‐cycle Coulombic efficiency is less than 150 % owing to an irreversible charge consumption for electrolyte decomposition. The as‐generated MO 3 is lithiated/de‐lithiated from the second cycle with excellent cycle performance and rate capability.
Type of Medium:
Online Resource
ISSN:
1433-7851
,
1521-3773
DOI:
10.1002/anie.201404510
Language:
English
Publisher:
Wiley
Publication Date:
2014
detail.hit.zdb_id:
2011836-3
detail.hit.zdb_id:
123227-7
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