Sodium ascorbate assisted uniform distribution of Fe3O4 nanoparticles on rGO surface: improved cycling and rate performance of rGO/Fe3O4 anode material for lithium ion batteries

• Published in: Nanocomposites 2015-08, Vol.1 (3), p.170-175
• Main Authors: Liang, C.-L., Liu, Y., Bao, R.-Y., Zhang, Y., Yang, W., Xie, B.-H., Yang, M.-B.
• Format: Article
• Language: English
• Subjects: Cycling performance; Lithium ion batteries; Reducing agents; rGO-Fe
• ISSN: 2055-0324; 2055-0332
• DOI: 10.1179/2055033215Y.0000000011

Reduced graphite oxide (rGO)-magnetite (Fe 3 O 4 ) composites, promising anode materials for lithium ion batteries, have aroused extensive interest. However, the effects of reducing agents of graphite oxide (GO) on the detailed morphology of the composite were rarely reported. Herein, reducing agents of GO, sodium ascorbate and hydrazine hydrate were selected, and sodium ascorbate was able to control the uniform distribution of Fe 3 O 4 on rGO sheets, resulting in stable cycling performance of above 500 mA h g − 1 after 100 cycles and high capacity of above 1200 mA h g − 1 in the first discharge/charge process. While in the composite reduced by hydrazine hydrate, severe aggregation of Fe 3 O 4 particles and their weak bonding to rGO sheets depleted the buffer effect of rGO, resulting in continuously fading of cycling performance. This work provided a convenient and an effective way of morphology control of rGO-Fe 3 O 4 composite during its one-pot formation.