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Entropymetry of Lithium Intercalation in Spinel Manganese Oxide: Effect of Lithium Stoichiometry

Yazami, R. and Reynier, Y. and Fultz, B. (2006) Entropymetry of Lithium Intercalation in Spinel Manganese Oxide: Effect of Lithium Stoichiometry. ECS Transactions, 1 (26). pp. 87-96. ISSN 1938-6737. https://resolver.caltech.edu/CaltechAUTHORS:20180913-133203686

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Abstract

Cathodes based on cubic (spinel) structure LiMn_2O_4 were investigated by electrochemical entropymetry in an attempt to characterize their phase diagram according to the initial lithium composition. The stoichiometric material shows a very pronounced 2-phase region in the high 4V plateau and a solid- solution behavior in the lower 4V plateau. A third region is found in the non stoichiometric material characterized by a steep increase in entropy. This may relate to the onset of a stoichiometry induced anticipated cubic to tetragonal phase transition in the 4V area in this material. The later has been so far reported to occur only in the 3V area.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1149/1.2209361DOIArticle
ORCID:
AuthorORCID
Yazami, R.0000-0002-0085-5012
Fultz, B.0000-0002-6364-8782
Additional Information:© 2006 ECS - The Electrochemical Society.
Issue or Number:26
Record Number:CaltechAUTHORS:20180913-133203686
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180913-133203686
Official Citation:Rachid Yazami, Yvan Reynier, and Brent Fultz Entropymetry of Lithium Intercalation in Spinel Manganese Oxide: Effect of Lithium Stoichiometry ECS Trans. 2006 1(26): 87-96; doi:10.1149/1.2209361
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:89622
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:14 Sep 2018 15:28
Last Modified:03 Oct 2019 20:17

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