High capacity ZnFe₂O₄ anode material for lithium ion batteries

详细信息    查看全文

• 作者：Yu  ; Ding ; Yifu  ; Yang  ; ;   ; ^{yang-y-f1@vip.sina.com} ; Huixia  ; Shao
• 关键词：Zinc ferrite ; Anode ; Li-ion battery ; Polymer pyrolysis method
• 刊名：Electrochimica Acta
• 出版年：2011
• 出版时间：30 October 2011
• 年：2011
• 卷：56
• 期：25
• 页码：9433-9438
• 全文大小：1270 K

文摘

A nanostructured ternary transition metal oxide, ZnFe₂O₄, is synthesized via the simple polymer pyrolysis method. The characteristics of the material are examined by thermogravimetry, Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The electrochemical test results show that this method of ZnFe₂O₄ synthesis produces high specific capacities and good cycling performance, with an initial specific capacity as high as 1419.6 mAh g^? at first discharge that is maintained at over 800 mAh g^? even after 50 charge¨Cdischarge cycles. The electrode also presents a good rate capability, with a high rate of 4C (1C = 928 mA g^?), a reversible specific capacity that can be as high as 400 mAh g^?. ZnFe₂O₄ is a potential alternative to high-performance nanostructured anode material in lithium ion batteries.