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A high capacity MnFe2O4/rGO nanocomposite for Li and Na-ion battery applications

机译：用于锂和钠离子电池应用的高容量MnFe2O4 / rGO纳米复合材料

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摘要

A porous MnFe2O4/reduced graphene oxide (rGO) nanocomposite with high storage capacity was prepared by a hydrothermal method. The MnFe2O4/rGO nanocomposite sample was characterized by X-ray diffraction, Raman spectroscopy, scanning electron microscopy and high resolution transmission electron microscopy. The electrochemical characteristics with lithium as well as sodium were studied using cyclic voltammetry and a battery cycle tester. In this work, apart from the lithium storage, the sodium storage ability of the spinel type MnFe2O4 as an anode is demonstrated for the first time. The prepared MnFe2O4/rGO composite with sodium alginate binder shows a highly stable capacity of 905 mA h g(-1) versus Li/Li+ and 258 mA h g(-1) versus Na/Na+ at 0.1C rate. The enhancement in capacity and excellent cycleability of the MnFe2O4/reduce graphene oxide nanocomposite is due to constrained volume expansion during conversion reactions and enhancement of electrical conductivity.
机译：采用水热法制备了具有高储能能力的多孔MnFe2O4 /还原氧化石墨烯（rGO）纳米复合材料。 MnFe2O4 / rGO纳米复合材料样品通过X射线衍射，拉曼光谱，扫描电子显微镜和高分辨率透射电子显微镜表征。使用循环伏安法和电池循环测试仪研究了锂和钠的电化学特性。在这项工作中，除了锂的存储，首次证明了尖晶石型MnFe2O4作为阳极的钠存储能力。制备的具有藻酸钠粘合剂的MnFe2O4 / rGO复合材料在0.1C速率下显示出相对于Li / Li +的905 mA h g（-1）和相对于Na / Na +的258 mA h g（-1）的高稳定容量。 MnFe2O4 /氧化石墨烯氧化物纳米复合材料的容量增强和出色的循环性能，是由于转化反应过程中受约束的体积膨胀和电导率的提高。

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