Parallelepipedally shaped ZnCo₂O₄ particles with a hierarchical porous structure as an anode for lithium-ion batteries

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• 作者：Si Cheng ; Haibo Rong ; Zhongqing Jiang ; Zihao Zhen ; Guiting Xie ; Bohong Chen&#8230
• 关键词：Parallelepipedally shaped ZnCo2O4 ; Hierarchical porous structure ; Anode material ; Lithium ; ion battery
• 刊名：Ionics
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：23
• 期：1
• 页码：77-85
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Electrochemistry; Renewable and Green Energy; Optical and Electronic Materials; Condensed Matter Physics; Energy Storage;
• 出版者：Springer Berlin Heidelberg
• ISSN：1862-0760
• 卷排序：23

文摘

The micrometer-sized ZnCo₂O₄ parallelepipeds with a hierarchical porous structure have been fabricated by a simple two-step procedure, i.e., the synthesis of the Zn_1/3Co_2/3CO₃ parallelepipeds and the subsequent calcination. When tested in lithium-ion batteries (LIBs), the hierarchical porous ZnCo₂O₄ parallelepipeds could exhibit a reversible capacity of >860 mAh g−1 at a current density of 0.1 C. This clearly demonstrates the potential use of the hierarchical porous ZnCo₂O₄ parallelepipeds in LIBs. The high electrochemical performance of the hierarchical porous ZnCo₂O₄ parallelepipeds might originate from the unique porous structure which consists of the secondary ZnCo₂O₄ particles. First, the porous structure allows for a better accessibility of the active material to the Li+ ion storage, favoring easier diffusion of electrolyte in and out of electrode material. Second, the presence of the secondary particles shortens a pathway of Li+ diffusion in ZnCo₂O₄, facilitating the better utilization of the active material.