Co-N-C氧还原反应电催化剂的制备及性能研究
Preparation of Co-N-C Electrocatalysts for Oxygen Reduction Reaction
宋昱扬 1张文彪 1高庆生1
作者信息
- 1. 暨南大学化学与材料学院,广东广州 511400
- 折叠
摘要
锌空气电池可作为一种无污染、长效、稳定可靠的电源,但其阴极氧还原反应(Oxygen Reduction Reaction,ORR)缓慢的动力学过程严重阻碍了大规模应用.本文通过表面活化策略在炭黑上构筑不饱和位点用于锚定Co,再以不同质量比的尿素作为氮源,制备了不同氮掺杂量的催化剂,并测试了一系列催化剂的ORR活性,及其在不同电解液中活性的差异.将催化剂用于组装锌空气电池,开路电压达1.441 V,并表现出良好的放电性能,峰值功率密度可达123.5 mW·cm-2.
Abstract
Zinc-air battery is a non-polluting,long-lasting and stable energy source.However,the slow kinetic process of the cathodic oxygen reduction reaction(ORR)severely impedes its large-scale application.In this work,a surface activation strategy was proposed to construct unsaturated sites on activated carbon for anchoring Co species.Varied amount of urea was used as the nitrogen sources to obtain catalysts with different nitrogen doping.The ORR activities of these catalysts were tested and analyzed in different electrolytes.Zinc-air batteries were assembled using Co-N5-C as the cathode materials,which show an open circuit voltage of 1.441 V,which showed good discharge performance with a maximum power density of 123.5 mW·cm-2.
关键词
氧还原反应/钴基氮掺杂碳催化剂/锌空气电池Key words
oxygen reduction reaction/Co-based nitrogen-doped carbon catalysts/Zinc-air battery引用本文复制引用
基金项目
国家自然科学基金项目(22175077)
广东省普通高校创新团队项目(2021KCXTD009)
广州市科技计划项目(202201020071)
出版年
2024
NETL
NSTL
万方数据