热再生电池堆-二氧化碳电化学还原池系统耦合特性

doi:10.16085/j.issn.1000-6613.2023-2130

化工进展 ›› 2024, Vol. 43 ›› Issue (5): 2568-2575.DOI: 10.16085/j.issn.1000-6613.2023-2130

• 新能源与可再生能源 • 上一篇

热再生电池堆-二氧化碳电化学还原池系统耦合特性

李思¹^,²(), 陶艺月¹^,², 肖振翀¹^,², 张亮¹^,²(), 李俊¹^,², 朱恂¹^,², 廖强¹^,²

^1.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
^2.重庆大学工程热物理研究所，重庆 400030

收稿日期:2023-12-01 修回日期:2024-04-16 出版日期:2024-05-15 发布日期:2024-06-15
通讯作者: 张亮
作者简介:李思（2000—），女，硕士研究生，研究方向为电化学能源转化。E-mail：lisi@stu.cqu.edu.cn。
基金资助:
国家自然科学基金(51976018);国家自然科学基金创新研究群体项目(52021004);重庆市自然科学基金(CSTB2022NSCQ-MSX1596);重庆归国留学人员科研基金(cx2021088)

Electrochemical characteristics of the coupled system of thermally regenerative battery stack and electrochemical CO₂ reduction cell

LI Si¹^,²(), TAO Yiyue¹^,², XIAO Zhenchong¹^,², ZHANG Liang¹^,²(), LI Jun¹^,², ZHU Xun¹^,², LIAO Qiang¹^,²

^1.Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing 400030, China
^2.Institute of Engineering Thermophysics, Chongqing University, Chongqing 400030, China

Received:2023-12-01 Revised:2024-04-16 Online:2024-05-15 Published:2024-06-15
Contact: ZHANG Liang

摘要/Abstract

摘要：

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。

关键词: 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

Abstract:

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.}

Key words: thermally regenerative battery, electrochemical CO₂ reduction, series stack, power generation, stability, Faraday efficiency, electrochemistry, recovery

中图分类号:

TM911.3

李思, 陶艺月, 肖振翀, 张亮, 李俊, 朱恂, 廖强. 热再生电池堆-二氧化碳电化学还原池系统耦合特性[J]. 化工进展, 2024, 43(5): 2568-2575.

LI Si, TAO Yiyue, XIAO Zhenchong, ZHANG Liang, LI Jun, ZHU Xun, LIAO Qiang. Electrochemical characteristics of the coupled system of thermally regenerative battery stack and electrochemical CO₂ reduction cell[J]. Chemical Industry and Engineering Progress, 2024, 43(5): 2568-2575.

图/表 5

图1 热再生电池与电化学还原CO2耦合模型示意图

图2 Ag@CP电极表征

图3 Ag@CP还原CO2催化特性

图4 非水系TRB串联堆产电性能及放电曲线

图5 TRBCs-CO2RR耦合特性

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热再生电池堆-二氧化碳电化学还原池系统耦合特性

Electrochemical characteristics of the coupled system of thermally regenerative battery stack and electrochemical CO₂ reduction cell

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热再生电池堆-二氧化碳电化学还原池系统耦合特性

Electrochemical characteristics of the coupled system of thermally regenerative battery stack and electrochemical CO2 reduction cell

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Electrochemical characteristics of the coupled system of thermally regenerative battery stack and electrochemical CO₂ reduction cell