| An advanced low-cost cathode composed of graphene-coated Na2.4Fe1.8(SO4)3 nanograins in a 3D graphene network for ultra-stable sodium storage |
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| 作者姓名： | Yongjin Fang Qi Liu Xiangming Feng Weihua Chen Xinping Ai Liguang Wang Liang Wang Zhiyuan Ma Yang Ren Hanxi YangYuliang Cao |
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| 作者单位： | College of Chemistry and Molecular Sciences;Department of Physics;College of Chemistry and Molecular Engineering;X-ray Science Division |
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| 基金项目： | financial support by the National Natural Science Foundation of China(Nos.21673165 and 21972108);National Key Research Program of China(No.2016YFB0901500);the supercomputing system in the Supercomputing Center of Wuhan University。 |
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| 摘 要： | Iron-based electrodes have attracted great attention for sodium storage because of the distinct cost effectiveness.However,exploring suitable iron-based electrodes with high power density and long duration remains a big challenge.Herein,a spray-drying strategy is adopted to construct graphene-coated Na2.4Fe1.8(SO4)3 nanograins in a 3D graphene microsphere network.The unique structural and compositional advantages endow these electrodes to exhibit outstanding electrochemical properties with remarkable rate performance and long cycle life.Mechanism analyses further explain the outstanding electrochemical properties from the structural aspect.
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| 关 键 词： | Na2.4Fe1.8(SO4)3 Polyanions Spray-drying CATHODE Sodium-ion batteries |
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