化工学报 ›› 2021, Vol. 72 ›› Issue (10): 5402-5411.DOI: 10.11949/0438-1157.20210376

• 材料化学工程与纳米技术 • 上一篇    下一篇

Cu2+掺杂MnO2作为水系锌离子电池正极材料的合成与电化学性能

张璐璐(),谭伯川,李文坡()   

  1. 重庆大学化学化工学院,重庆 401331
  • 收稿日期:2021-03-15 修回日期:2021-06-24 出版日期:2021-10-05 发布日期:2021-10-05
  • 通讯作者: 李文坡
  • 作者简介:张璐璐(1996—),女,硕士研究生,2463883269@qq.com
  • 基金资助:
    重庆市自然科学基金项目(cstc2019jcyj-msxmX0347);国家自然科学基金项目(21878029)

Synthesis and electrochemical properties of Cu2+-doped MnO2 as cathode materials for aqueous zinc ion batteries

Lulu ZHANG(),Bochuan TAN,Wenpo LI()   

  1. School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
  • Received:2021-03-15 Revised:2021-06-24 Online:2021-10-05 Published:2021-10-05
  • Contact: Wenpo LI

摘要:

采用简单的一步电沉积方法制备了Cu2+掺杂的MnO2材料。通过XRD、SEM、TEM等方法对材料进行了表征,结果表明其具有蓬松多孔的纳米结构,作为电池正极材料时有利于Zn2+的存储,具有较高的电池容量。与未掺杂样品相比Cu2+掺杂的MnO2材料有更好的电化学性能,在电流密度为200 mA/g时,比容量达到235 mAh/g,增加了47.8%,阻抗也由997.3 Ω降到了564.3 Ω。

关键词: 铜掺杂, 锌离子电池, 正极材料, 纳米结构

Abstract:

In this paper, a simple one-step electrodeposition method was used to prepare Cu2+-doped MnO2 materials. A series of examinations such as XRD, SEM and TEM are employed to describe the characteristic of Cu2+ doped MnO2 samples. As a result, the Cu2+ doped MnO2 materials possess a fluffy porous nanostructure and exhibit enhanced electrochemical performance when as a cathode of aqueous zinc ion batteries. In detail, the specific capacity of Cu2+ doped MnO2 samples exhibit 235 mAh/g in 200 mA/g, which is about 47.8% higher than that of pure MnO2 sample. Furthermore, the impedance of Cu2+ doped MnO2 is also reduced from 997.3 Ω to 564.3 Ω.

Key words: copper doping, zinc ion battery, cathode material, nanostructure

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