Mesoporous composite cathode materials prepared from inverse micelle structures for high performance lithium ion batteries

Mesoporous Li sub(4)Mn sub(5)O sub(12)/Li sub(2)MnO sub(3) composite cathodes are prepared from inverse micelle structures for high-performance LIBs. The relative ratio of layered Li sub(2)MnO sub(3) to spinel Li sub(4)Mn sub(5)O sub(12) in the composite electrodes could be elaborately controlled as...

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Bibliographic Details
Published in:RSC advances 2014-01, Vol.4 (23), p.11598-11604
Main Authors: Kim, Si-Jin, Lee, Young-Woo, Hwang, Bo-Mi, Kim, Seong-Bae, Kim, Woo-Seong, Cao, Guozhong, Park, Kyung-Won
Format: Article
Language:English
Subjects:
Cathodes
Composite materials
Electrodes
Inverse
Lithium-ion batteries
Manganese
Micelles
Precursors
Solid solutions
Spinel
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Summary:Mesoporous Li sub(4)Mn sub(5)O sub(12)/Li sub(2)MnO sub(3) composite cathodes are prepared from inverse micelle structures for high-performance LIBs. The relative ratio of layered Li sub(2)MnO sub(3) to spinel Li sub(4)Mn sub(5)O sub(12) in the composite electrodes could be elaborately controlled as a function of molar ratio of LiNO sub(3) to Mn(NO sub(3)) sub(2) (Li/Mn) in the precursor. All Li sub(4)Mn sub(5)O sub(12)/Li sub(2)MnO sub(3) composite cathodes exhibit relatively large specific surface areas and mesoporous character, which might be favorable for lithium-ion mobility. The relative ratio of layered Li sub(2)MnO sub(3) to spinel Li sub(4)Mn sub(5)O sub(12) in the composite electrodes were elaborately controlled as a function of molar ratio of LiNO sub(3) to Mn(NO sub(3)) sub(2) (Li/Mn) in the precursor. Our results suggest the better cycle performance of Li excess materials with a solid solution of Li sub(4)Mn sub(5)O sub(12)/Li sub(2)MnO sub(3) is due to stabilization of the Li sub(2)MnO sub(3) structure by addition of a layered component.
ISSN:2046-2069
2046-2069
DOI:10.1039/c3ra45654d