东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (11): 1578-1581.DOI: 10.12068/j.issn.1005-3026.2016.11.013

• 材料与冶金 • 上一篇    下一篇

新型钠离子电池正极材料Na(Ni0.5Mn0.5)O2的制备和电化学性能

刘国强， 李跃， 杜玉龙   

  1. (东北大学 冶金学院， 辽宁 沈阳110819)
  • 收稿日期:2015-09-09 修回日期:2015-09-09 出版日期:2016-11-15 发布日期:2016-11-18
  • 通讯作者: 刘国强
  • 作者简介:刘国强(1966-)，男，辽宁鞍山人，东北大学教授.
  • 基金资助:
    辽宁省自然科学基金资助项目(2014020035); 国家自然科学基金资助项目(51574081).

Synthesis and Electrochemical Properties of Cathode Materials Na(Ni0.5Mn0.5)O2 for Na Ion Batteries

LIU Guo-qiang， LI Yue， DU Yu-long   

  1. School of Metallurgy， Northeastern University， Shenyang 110819， China.
  • Received:2015-09-09 Revised:2015-09-09 Online:2016-11-15 Published:2016-11-18
  • Contact: LIU Guo-qiang
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摘要： 以CH3COONa，Ni(CH3COO)2·4H2O和Mn(CH3COO)2·4H2O为原料，经过溶解、干燥和焙烧，得到产物Na(Ni0.5Mn0.5)O4.利用XRD，SEM对材料进行了结构和形貌的分析，结果显示产物含有少量的NiO相，呈片状形貌，颗粒小于5μm，有一定程度的团聚.对材料进行了不同倍率的充放电性能测试，产物展示了较好的电化学性能，0.1，0.2，0.5，1和5倍率时的放电容量分别为124，121，116.7，110.1和73.8mA·h/g.产物在2.0～4.0V电压区间充放电循环30次后，室温和55℃下的容量保持率分别为94.8%和91.1%，显示具有较好的高温性能，可以作为钠离子电池正极材料.

关键词: 层状化合物Na(Ni0.5Mn0.5)O2, 阴极材料, 制备, 钠离子电池, 电化学性能

Abstract: Layered structure Na(Ni0.5Mn0.5)O2 oxide was synthesized using CH3COONa， Ni(CH3COO)2·4H2O and Mn (CH3COO)2·4H2O as starting materials after dissolution， drying and calcining. The crystal structure， morphology of the prepared sample was investigated by XRD and SEM. There was small amount of NiO phase in the product， and the product is of layered structure. Their particles were less than 5μm and there was particle aggregation. The charge-discharge testes for the samples were also carried out. The prepared sample exhibited good rate capability. It delivered a capacity of 124，121，116.7，110.6 and 73.8mA·h/g at 0.1，0.2，0.5，1 and 5 rate，respectively. After 30 cycles， its capacity retention ratio was 94.8% at 25℃ and 91.1% at 55℃. It can be used as cathode material for sodium ion batteries.

Key words: layered structure NaNi0.5Mn0.5O2, cathode materials, preparation, sodium-ion batteries, electrochemical properties

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