Abstract
ZnFe2O4-graphene aerogels (ZnFe2O4/GAs) composites are prepared by two-step method (hydrothermal-calcination). Highly-purified ZnFe2O4 nanoparticles are dispersed uniformly on three-dimensional (3D) GAs substrate. The mass loading of ZnFe2O4 in ZnFe2O4/GAs composites is 89.3%. Compared with pure ZnFe2O4 sample, the ZnFe2O4/GAs composites exhibit much higher irreversible capacity of 1449.4mAhg−1 and enhanced cycling stability (1049mAhg−1 at 100mAg−1 after 100 cycles). The improved electrochemical performance of the ZnFe2O4/GAs composites could be attributed from the synergetic effect between 3D conductive GAs and nanostructured ZnFe2O4.
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