Magnetic phase transition of Li0.75CoO2 compared with LiCoO2 and Li0.5CoO2

Magnetic and thermodynamic properties of the LiCoO 2 positive-electrode material used in lithium-ion battery were first examined. Partially deintercalated LiCoO 2 that is Li 0.75 CoO 2 , showed definite anomaly in the magnetic susceptibility at T =ca. 175 K probably related to magnetic phase transit...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2008-05, Vol.92 (2), p.399-401
Main Authors: Ito, A., Tanaka, K., Kawaji, H., Atake, T., Ando, N., Hato, Y.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Chemistry
Chemistry and Materials Science
Inorganic Chemistry
Measurement Science and Instrumentation
Physical Chemistry
Polymer Sciences
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Summary:Magnetic and thermodynamic properties of the LiCoO 2 positive-electrode material used in lithium-ion battery were first examined. Partially deintercalated LiCoO 2 that is Li 0.75 CoO 2 , showed definite anomaly in the magnetic susceptibility at T =ca. 175 K probably related to magnetic phase transition which was supported by observation of a weak anomaly in heat capacity. On the other hand, LiCoO 2 did not show such magnetic phase transition as expected, whereas Li 0.5 CoO 2 a weak one in the similar temperature range. These behaviors are discussed in association with the mixing of Co 3+ and Co 4+ electronic structures.
ISSN:1388-6150
1588-2926
1572-8943
DOI:10.1007/s10973-007-8959-x