首页|热再生电池堆-二氧化碳电化学还原池系统耦合特性

热再生电池堆-二氧化碳电化学还原池系统耦合特性

扫码查看
原文链接
  • 万方数据
  • 维普
为了减少工业烟气中余热与CO2的排放,本文提出了热再生电池堆-二氧化碳电化学还原池系统(TRB-CO2RR).该系统通过串联多个非水系热再生电池(thermally regenerative battery,TRB)构建电堆,并将其用于驱动CO2电化学还原(electrochemical reduction of CO2,CO2RR).本文研究了CO2电化学还原特性、非水系TRB电堆性能及非水系TRB-CO2RR系统耦合特性.研究结果表明,碳纸负载纳米银多孔电极上催化剂分布较为均匀,在-1.8V电位下(对应的槽电压为5.1V)表现出最佳的电化学还原CO2 性能,其CO法拉第效率达到了最佳值78.7%.为此,构建了6个子电池的串联电堆,开路电压达到7.2V左右,最大功率为235mW,在34min内放电相对稳定.运行非水系TRB-CO2RR耦合系统后,电堆未出现反极现象,CO法拉第效率(73.1%)接近稳定电源所获得的最佳值.未来研究可通过优化催化剂和电堆设计,有望进一步提高耦合系统CO2RR转化效率.
Electrochemical characteristics of the coupled system of thermally regenerative battery stack and electrochemical CO2 reduction cell
To effectively address the low-temperature heat and CO2 in industrial flue gas,a thermal regenerative battery stack coupled with an electrochemical reduction reaction of carbon dioxide system(TRB-CO2RR)was developed.A stack was constructed by connecting several non-aqueous thermally regenerative batteries in series,serving to drive an electrochemical reduction of CO2.The characteristics of CO2RR,the performance of the non-aqueous TRB stack,and the coupling characteristics of the non-aqueous TRB-CO2RR system were studied.The results demonstrated a relatively uniform distribution of catalyst on a carbon paper-supported silver nanoparticle porous electrode.The optimal CO2RR performance was observed at a potential of-1.8V(corresponding to a slot voltage of 5.1V),with a CO Faraday efficiency reaching a peak of 78.7%.Therefore,a series stack of six batteries was constructed.The open circuit voltage reached approximately 7.2V,with a maximum power of 235mW and a relatively stable discharge lasting for 34min.In the non-aqueous TRB-CO2RR coupled system,no reverse pole phenomenon was observed in the stack,and the CO Faraday efficiency(73.1%)closely approached the optimum value achieved by a stable power supply.Further research could be focused on optimizing catalysts and stack design,aiming to improve the efficiency of CO2RR in this coupled system.

thermally regenerative batteryelectrochemical CO2 reductionseries stackpower generationstabilityFaraday efficiencyelectrochemistryrecovery

李思、陶艺月、肖振翀、张亮、李俊、朱恂、廖强

展开 >

重庆大学低品位能源利用技术及系统教育部重点实验室,重庆 400030

重庆大学工程热物理研究所,重庆 400030

热再生电池 CO2电化学还原 串联电堆 产电功率 稳定性 法拉第效率 电化学 回收

国家自然科学基金国家自然科学基金创新研究群体项目重庆市自然科学基金重庆归国留学人员科研基金

5197601852021004CSTB2022NSCQ-MSX1596cx2021088

2024

10.16085/j.issn.1000-6613.2023-2130

化工进展
中国化工学会,化学工业出版社

化工进展

CSTPCD北大核心
影响因子：1.062
ISSN：1000-6613
年,卷(期)：2024.43(5)
  • 7