化工学报 ›› 2020, Vol. 71 ›› Issue (3): 1390-1397.DOI: 10.11949/0438-1157.20191448

• 材料化学工程与纳米技术 • 上一篇    下一篇

ZnxCo1-xCO3碳酸盐负极材料的制备及其电化学性能研究

李敬(),杜刚,殷娟娟()   

  1. 四川新锂想能源科技有限责任公司,四川 遂宁 629200,清华大学深圳国际研究生院,广东 深圳 518055
  • 收稿日期:2019-11-28 修回日期:2020-01-06 出版日期:2020-03-05 发布日期:2020-03-05
  • 通讯作者: 殷娟娟
  • 作者简介:李敬(1984—),男,博士,高级工程师,lijing_com@163.com

Preparation and electrochemical properties of ZnxCo1-xCO3 carbonateanode materials

Jing LI(),Gang DU,Juanjuan YIN()   

  1. Sichuan New Li-IDEA Energy and Science Technology Co. , Ltd. , Suining 629200, Sichuan, China, Shenzhen 518055, Guangdong, China
  • Received:2019-11-28 Revised:2020-01-06 Online:2020-03-05 Published:2020-03-05
  • Contact: Juanjuan YIN

摘要:

碳酸钴是一类典型的转换型负极锂电池材料,具有资源丰富、比容量高、安全可靠等优点,但是存在一些尚未解决的问题,例如导电性比较差,同时在锂离子的嵌入和脱出过程中体积变化严重。通过水热法制备了不同组分Zn掺杂ZnxCo1-xCO3 (x=0.12, 0.3, 0.5),通过调整Zn和Co原材料质量来控制Zn/Co的摩尔比,研究表明当Zn和Co的摩尔比为0.3∶0.7时,掺杂产物有良好的循环和倍率性能,锌离子的掺杂提高了锂离子电导率,对ZnxCo1-xCO3 (x=0.12, 0.3, 0.5)研究表明其在充放电过程中既有合金反应又有转换反应,提高了整个电极的导电性,进而表现出优异的电化学性能。

关键词: 锂离子电池, 碳酸钴, 高振实密度, 掺杂, 电化学, 化学反应, 合成

Abstract:

Cobalt carbonate is a typical type of conversion anode lithium battery material, with rich resources, high capacity, safe and reliable and other advantages, but there are some unresolved problems, such as poor conductivity, at the same time in the lithium ion embedding and excitability process of serious volume changes. In this paper, the different components of Zn doped ZnxCo1-xCO3 by hydrothermal method, by adjusting the quality of Zn and Co raw materials to control the molar ratio of Zn/Co, the study shows that when molar ratio of Zn and Co is 0.3∶0.7, doping products have good cycle and multiplier performance, zinc ion doping lithium ion conductivity. The study of ZnxCo1-xCO3 (x=0.12,0.3, 0.5) showed that it had both an alloy and a conversion reaction during charging and discharging process, which improves the conductivity of the whole electrode and then exhibits excellent electrochemical properties.

Key words: lithium ion battery, CoCO3, high tap density, doping, electrochemistry, chemical reaction, synthesis

中图分类号: