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中国物理学会期刊

ZnFe2O4的固相法和水热法制备及其电化学性能研究

CSTR: 32037.14.aps.60.058201

Investigation of electrochemical performances of ZnFe2O4 prepared by solid state and hydrothermal method

CSTR: 32037.14.aps.60.058201
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  • 本文用固相反应法和水热法制备了ZnFe2O4材料,X射线衍射(X-ray diffraction, XRD)表明制备出来的ZnFe2O4为尖晶石结构,表面形貌测试 (scanning electron microscopy, SEM) 显示两种方法制备的材料的平均粒径分别为500 nm和200 nm.比表面积测试结果表明,两种方法制备的样品的比表面积分别为136.7 m2 g-1 

    Spinel structure ZnFe2O4 were prepared by solid state reaction and hydrothermal method. Investigations on X-ray diffraction (XRD), scanning electron microscopy (SEM) and specific area measuements indicate that the samples are well-crystallized cubic spinel structre with average particle sizes of 500 nm and 200 nm and specific areas of 136.7 m2 g-1 and 382.5 m2 g-1 for solid state reaction and hydrothermal method, respectively. The ZnFe2O4 samples show high lithium-storage capacity and good reversibility. Compared with the sample prepared by solid state reaction, ZnFe2O4 prepared by hydrothermal method demonstrate better electrochemical performances. Its specific charge capacity decays from 750 mAh g-1 to 702 mAh g-1 after 30 cycles, with capacity retention of 93.6 %. ZnFe2O4 is a very promising anode material for lithium ion battery for its easy preparation, low coat and good electrochemical performances.

     

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