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Effects of Lattice Defects on Cathode Properties of LiMn2O4 Synthesized at Low Temperatures for Lithium Ion Secondary Battery

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Abstract:

Effects of lattice defects on cathode properties of LiMn2O4 synthesized at low temperatures were investigated. LiMn2O4 powders were synthesized by a sol-gel method. The specific capacities of LiMn2O4 decreased from 134 to 81 mAh g-1 with decreasing heating temperature from 750 to 200°C. X-ray absorption spectroscopy showed that a large amount of lattice defects such as cation vacancies existed and cation mixing occurred in LiMn2O4 calcined at low temperatures. It was found that the low specific capacities of LiMn2O4 calcined at low temperatures were attributed to these lattice defects.

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Periodical:

Key Engineering Materials (Volume 388)

Pages:

41-44

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.388.41

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Online since:

September 2008

Authors:

Hiroyuki Kaiya, Shinya Suzuki, Masaru Miyayama

Keywords:

Cathode Property, EXAFS, Lattice Defect, LiMn2O4, Lithium Ion Secondary Battery

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© 2009 Trans Tech Publications Ltd. All Rights Reserved

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