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化学电源近期研究专辑(武汉大学 杨汉西教授主编)

NaF-M(M=Fe, Cu)钠离子电池转换正极材料的研究

  • 李婷 ,
  • 陈重学 ,
  • 曹余良 ,
  • 杨汉西
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  • 武汉大学化学与分子科学学院,湖北 武汉 430072

收稿日期: 2011-11-24

  修回日期: 2012-02-11

  网络出版日期: 2012-02-16

基金资助

国家自然科学基金项目(No. 2009CB2201003)资助

NaF-M (M = Fe, Cu) Nanocomposites as Conversion Cathode Materials for Sodium Ion Batteries

  • LI Ting ,
  • CHEN Zhong-Xue ,
  • CAO Yu-Liang ,
  • YANG Han-Xi
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  • College of Chemistry and Molecular Science, Wuhan University, Wuhan, 430072,Hubei, China

Received date: 2011-11-24

  Revised date: 2012-02-11

  Online published: 2012-02-16

摘要

以纳米TiN为研磨剂,采用机械球磨技术制备了NaF-M(M = Fe, Cu)纳米复合物,探索了这类复合物作为钠离子电池转换正极材料的可能性. 电化学测试表明,NaF-Fe和NaF-Cu纳米复合物电极在钠离子电解液中能实现与Na+的逆向转换反应,其可逆放电容量达150 mAh.g-1以上,并具有较好的循环寿命. 只要创造了适合相转变反应进行的微区结构,钠离子的转换反应也可以通过可逆的电化学转换反应实现,并从起始的富钠放电态直接充电至贫钠的荷电态. 本工作为开发高容量钠离子电池正极材料提供了新途径.

本文引用格式

李婷 , 陈重学 , 曹余良 , 杨汉西 . NaF-M(M=Fe, Cu)钠离子电池转换正极材料的研究[J]. 电化学, 2012 , 18(4) : 291 -294 . DOI: 10.61558/2993-074X.2918

Abstract

The NaF-M (M = Fe, Cu) nanocomposites were prepared by high-energy ball milling using TiN grinding nanoparticles and investigated as cathode materials for sodium ion batteries. The experimental results demonstrated that NaF-Fe and NaF-Cu nanocomposites can go through electrochemical conversion reaction with Na+ uptake or removal, delivering a reversible capacity of ~ 150 mAh.g-1, even through a reversed conversion from initial discharged state to a charged state. These results reveal the possibility to realize a conversion reaction as long as NaF and elemental metal particles are intimately contacted to form active nanocomposites at nanodomain, which suggests a potential feasibility to use these nanocomposites as sodium-rich cathode materials for sodium ion batteries.
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