Iron oxide/graphene composites as negative-electrode materials for lithium ion batteries – optimum particle size for stable performance

We synthesized Fe 2 O 3 /graphene composites by a hydrothermal method. The effect of varying the pH in the range pH = 8–12 on the properties of the composites and their performance as negative-electrode materials in lithium ion batteries was investigated. The particle size increased with increasing...

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Bibliographic Details
Published in:RSC advances 2015-10, Vol.5 (111), p.91466-91471
Main Authors: Sun, Qian, Liu, Xiang, Djurišić, Aleksandra B., Leung, Tik Lun, Xie, Maohai, Ng, Alan M. C., Li, Hang Kong, Deng, Zhaofeng, Shih, Kaimin
Format: Article
Language:English
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Summary:We synthesized Fe 2 O 3 /graphene composites by a hydrothermal method. The effect of varying the pH in the range pH = 8–12 on the properties of the composites and their performance as negative-electrode materials in lithium ion batteries was investigated. The particle size increased with increasing pH. The best battery performance was obtained for composites prepared at pH = 10 (specific capacity exceeding 800 mA h g −1 after 60 cycles) due to superior preservation of the electrode morphology compared to samples prepared at lower or higher pH values.
ISSN:2046-2069
2046-2069
DOI:10.1039/C5RA19852F