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Synthesis of Mn3O4-Based Aerogels and Their Lithium-Storage Abilities

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Mn3O4 aerogels and their graphene nanosheet (GN) composite aerogels were synthesized by a simple supercritical-ethanol process. In the process, supercritical ethanol acted as a reductant to reduce graphene oxide and MnO2 gels simultaneously. The synthesized aerogels consisted of 10–20 nm Mn3O4 nanocrystallites, with BET-specific surface areas around 60 m2/g. The performance of the aerogels as anode materials for lithium-ion batteries was also evaluated in this study. The results showed that Mn3O4 aerogels as anode materials exhibited a reversible capacity of 498.7 mAh/g after 60 charge/discharge cycles while the reversible capacity for Mn3O4/GN composite aerogels could further increase to 665 mAh/g. The mechanisms for the enhanced capacity retention could be attributed to their porous structures and improved electronic contact with GN addition. The process should also offer an effective and facile method to fabricate many other porous metal oxide/GN nanocomposites for low-cost, high-capacity, environmentally benign material for lithium-ion batteries.




Tang, H., Sui, Y., Zhu, X., & Bao, Z. (2015). Synthesis of Mn3O4-Based Aerogels and Their Lithium-Storage Abilities. Nanoscale Research Letters, 10(1).

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