Polypyrrole-Coated Zinc Ferrite Hollow Spheres with Improved Cycling Stability for Lithium-Ion Batteries

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• 作者：Xiaoran Sun ; Hongwei Zhang ; Liang Zhou ; Xiaodan Huang and Chengzhong Yu
• 刊名：Small
• 出版年：2016
• 出版时间：July 20, 2016
• 年：2016
• 卷：12
• 期：27
• 页码：3732-3737
• 全文大小：902K
• ISSN：1613-6829

文摘

Here, ZnFe₂O₄ double-shell hollow microspheres are designed to accommodate the large volume expansion during lithiation. A facile and efficient vapor-phase polymerization method has been developed to coat the ZnFe₂O₄ hollow spheres with polypyrrole (PPY). The thin PPY coating improves not only the electronic conductivity but also the structural integrity, and thus the cycling stability of the ZnFe₂O₄ hollow spheres. Our work sheds light on how to enhance the electrochemical performance of transition metal oxide-based anode materials by designing delicate nanostructures.