物理化学学报 >> 2014, Vol. 30 >> Issue (1): 150-156.doi: 10.3866/PKU.WHXB201311142

催化和表面科学 上一篇    下一篇

热处理温度对锂氧气电池用Co-N/C催化剂催化性能的影响

阳炳检, 王红, 李磊, 黄博文, 廖小珍, 何雨石, 马紫峰   

  1. 上海交通大学化学化工学院化学工程系电化学与能源技术研究所, 上海 200240
  • 收稿日期:2013-09-16 修回日期:2013-11-08 发布日期:2014-01-01
  • 通讯作者: 廖小珍 E-mail:Liaoxz@sjtu.edu.cn
  • 基金资助:

    国家重点基础研究发展规划项目(973) (2014CB932303)及国家自然科学基金(21073120,21336003,21006063)资助

Influence of Calcination Temperature on Performances of Co-N/C Electrocatalysts for Li/O2 Cells

YANG Bing-Jian, WANG Hong, Li Lei, HUANG Bo-Wen, LIAO Xiao-Zhen, HE Yu-Shi, MA Zi-Feng   

  1. Institute of Electrochemical and Energy Technology, Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
  • Received:2013-09-16 Revised:2013-11-08 Published:2014-01-01
  • Contact: LIAO Xiao-Zhen E-mail:Liaoxz@sjtu.edu.cn
  • Supported by:

    The project was supported by the National Key Basic Research Program of China (973) (2014CB932303) and National Natural Science Foundation of China (21073120, 21336003, 21006063).

摘要:

开发低成本、高效的空气电极催化剂是发展锂空气电池的关键课题之一. 采用邻菲咯啉(phen)为配体制备Co(phen)2配合物,负载于BP2000 碳载体上,并分别在600、700、800 和900 ℃的温度下进行热处理,制备得到碳支撑的Co-N催化剂(Co-N/C). 对催化剂的氧还原反应/析氧反应(ORR/OER)活性进行了表征,并且与典型的CoTMPP/C催化剂进行了比较. 同时研究了煅烧温度对Co-N/C催化剂的组成和结构的影响. 电化学测试结果表明,热处理温度为700-800 ℃时催化剂具有较好的电化学性能. Co-N/C催化剂具有电化学性能优良与低成本的特点,是一种良好的锂氧气电池催化剂.

关键词: 可充电锂氧气电池, 氧电极, ORR/OER催化剂, Co(phen)2配合物, 焙烧温度

Abstract:

The development of low-cost and effective electrocatalysts for air electrodes is critical for practical applications of lithium/oxygen batteries. In the present work, phenanthroline (phen) was used as a ligand to prepare a Co(phen)2 complex. The Co(phen)2 complex was coated on BP2000 and then heat treated at 600, 700, 800, and 900 ℃, to obtain carbon-supported Co-N (Co-N/C) catalysts. The catalytic activities in oxygen reduction reaction/oxygen evolution reaction (ORR/OER) of the prepared catalysts were measured and compared with those of a typical carbon-supported cobalt tetramethoxyphenylporphyrin (CoTMPP/C) catalyst. The influence of the calcination temperature on the composition and structure of the Co-N/C catalysts was investigated. Electrochemical tests showed that the Co-N/C catalysts prepared at 700 and 800 ℃ gave better performances, comparable to that of the CoTMPP/C catalyst. The superior electrochemical performance of the prepared Co-N/C catalysts and the low cost of the phenanthroline chelating agent make Co-N/C a promising cheap catalyst for lithium/oxygen batteries.

Key words: Rechargeable lithium/oxygen battery, Oxygen electrode, ORR/OER catalyst, Cobalt phenanthroline complex, Calcination temperature

MSC2000: 

  • O643