Electrospinning combined with hydrothermal synthesis and lithium storage properties of ZnFe₂O₄-graphene composite nanofibers

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• 作者：Hui Qiao^a ; ^{huiqiaoz@163.com} ; Zhaokang Xia^a ; Yaqian Fei^a ; Liying Cai^a ; Rongrong Cui^a ; ; Yibing Cai^a ; Qufu Wei^a ; Qingxia Yao^b
• 关键词：Electrospinning ; Solvothermal ; Composite nanofibers ; Energy storage materials ; Electrochemical performance
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：1 February 2017
• 年：2017
• 卷：43
• 期：2
• 页码：2136-2142
• 全文大小：1091 K
• 卷排序：43

文摘

ZnFe2O4-graphene composite nanofibers were prepared through electrospinning technique, then with graphene oxide by the facile solvothermal method to get the final products for the first time. The obtained ZnFe2O4 nanofibers composed of numerous same size nanoparticles wrapped by graphene sheets to form a unique nanostructure. When the ZnFe2O4-graphene electrode was evaluated as anode for lithium-ion batteries, good rate capability and long-term cycling stability could be achieved. The ZnFe2O4-graphene electrode exhibited a first discharge capacity of 2166 mAh g−1 cycling at 0.05 C, remained an average reversible capacity of 1000 mAh g−1 after 50 cycles, and kept the high rate capacities of 899, 822, 760 and 711 mAh g−1 at the current rates of 0.5, 1, 2 and 5 C, respectively. The excellent electrochemical performance could be ascribed to the following reasons: the large electrochemical active surface area provided by the composite nanofibers; the graphene sheets decreased the internal resistance of the lithium-ion batteries, which resulted from the electrical conductivity of the graphene sheets; the graphene sheets as conductive network could effectively restrain the agglomeration of ZnFe2O4 nanopaiticals.