储能科学与技术

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 新型O3-NaCu1/9Ni2/9Fe1/3Mn1/3O2钠离子电池正极材料研究

穆林沁,戚兴国,胡勇胜,李  泓,陈立泉,黄学杰   

  1. 中国科学院物理研究所,北京 100190
  • 收稿日期:2016-03-13 修回日期:2016-03-30 出版日期:2016-04-05 发布日期:2016-04-05
  • 通讯作者: 通讯联系人:胡勇胜,研究员,E-mail:yshu@iphy.ac.cn。
  • 作者简介:第一作者:穆林沁(1987—),男,博士研究生,研究方向为钠离子电池新型电极材料以及器件的研究,E-mail: mulinqin2006@126.com;
  • 基金资助:
    国家自然科学基金(51222210和11234013),科技部高科技研究发展计划(863计划)(2009AA033101)及中国科学院“百人计划”项目

MU Linqin, QI Xinguo, HU Yong sheng, LI Hong, CHEN Liquan, HUANG Xuejie   

  1. Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2016-03-13 Revised:2016-03-30 Online:2016-04-05 Published:2016-04-05

摘要: 由于钠具有资源丰富和成本低廉的优势,钠离子电池再次受到科学界和工业界的广泛关注。发展低成本、性能优异的正极材料对于钠离子电池至关重要。本文通过向O3-Na0.90[Cu0.22Fe0.30Mn0.48]O2材料中引入容易变价的Ni2+得到一种新型的不含Mn3+的钠离子电池正极材料O3-NaCu1/9Ni2/9Fe1/3Mn1/3O2,该材料具有127 mA·h/g可逆比容量,3.1 V平均放电电位。由该正极与硬碳球负极组装成全电池具有248 W·h/kg的理论能量密度,高达93%的能量转化效率和优异的循环性能。

关键词: 层状氧化物, 正极材料, 钠离子电池

Abstract: Sodium-ion batteries have attracted widespread attentions due to the abundant sodium resources and their potential low cost. It is crucial to develop low-cost and excellent performance cathode materials for SIBs. Herein, O3-NaCu1/9Ni2/9Fe1/3Mn1/3O2, a novel cathode material without Mn3+ has been synthesized by a simple solid-state reaction. Galvanostatic charge/discharge measurement for the O3-NaCu1/9Ni2/9Fe1/3Mn1/3O2 electrode between 2.0V and 4.0 V provides a reversible capacity of 127 mA·h/g and the average discharge voltage of 3.1 V. The full cell using it as the cathode and hard carbon as the anode delivers an energy density of 248 W·h/kg, an energy conversion efficiency of 93% and an excellent cycling performance.

Key words:  layered oxide, cathode materials, sodium-ion batteries