High-Performance Cu-Based Liquid Thermocells Enabled by Thermosensitive Crystallization and Etched Carbon Cloth ElectrodeOA
Thermocells are garnering increasing attention as a promising thermoelectric technology for harvesting low-grade heat.However,their performance is often limited by the scarcity of high-performance redox couples that possess both high thermopower and rapid redox kinetics.This work addresses this challenge by leveraging our recently developed copper(Ⅰ/Ⅱ)(Cu^(+)/Cu^(2+))redox couple.We significantly enhance the performance of Cu-based liquid thermocells by integrating a thermosensitive crystallization process with etched carbon cloth electrodes,achieving synergistic improvements in thermodynamic and kinetic performance.The thermosensitive crystallization process establishes a persistent Cu^(2+)concentration gradient,boosting the thermopower from 1.47 to 2.93 mV K^(-1).Moreover,the etched carbon cloth electrodes provide a larger electroactive surface area and demonstrate a higher current density.Consequently,the optimized Cu^(+)/Cu^(2+)system achieved an exceptional normalized power density P_(max)(ΔT)^(-2)of 3.97 mW m^(-2)K^(-2).A thermocell module comprised of 20 cells directly power various electronic devices at a temperature difference of 40 K.This work successfully exhibits potential of Cu^(+)/Cu^(2+)redox couple in thermoelectric conversion and introduces a valuable redox couple for highperformance thermocells.
Wei Fang;Zeping Ou;Yifan Wang;Zhe Li;Qian Huang;Pengchi Zhang;Xinzhe Li;Yujie Zheng;Lijun Hu;Chen Li;Jianyong Ouyang;Kuan Sun
MOE Key Laboratory of Low-Grade Energy Utilization Technologies and Systems,School of Energy and Power Engineering,Chongqing University,Chongqing 400044,People’s Republic of ChinaMOE Key Laboratory of Low-Grade Energy Utilization Technologies and Systems,School of Energy and Power Engineering,Chongqing University,Chongqing 400044,People’s Republic of ChinaMOE Key Laboratory of Low-Grade Energy Utilization Technologies and Systems,School of Energy and Power Engineering,Chongqing University,Chongqing 400044,People’s Republic of ChinaMOE Key Laboratory of Low-Grade Energy Utilization Technologies and Systems,School of Energy and Power Engineering,Chongqing University,Chongqing 400044,People’s Republic of ChinaMOE Key Laboratory of Low-Grade Energy Utilization Technologies and Systems,School of Energy and Power Engineering,Chongqing University,Chongqing 400044,People’s Republic of ChinaMOE Key Laboratory of Low-Grade Energy Utilization Technologies and Systems,School of Energy and Power Engineering,Chongqing University,Chongqing 400044,People’s Republic of ChinaMOE Key Laboratory of Low-Grade Energy Utilization Technologies and Systems,School of Energy and Power Engineering,Chongqing University,Chongqing 400044,People’s Republic of ChinaMOE Key Laboratory of Low-Grade Energy Utilization Technologies and Systems,School of Energy and Power Engineering,Chongqing University,Chongqing 400044,People’s Republic of ChinaHunan Key Laboratory for the Design and Application of Actinide Complexes,School of Chemistry and Chemical Engineering,University of South China,Hengyang 421001,Hunan,People’s Republic of ChinaMOE Key Laboratory of Low-Grade Energy Utilization Technologies and Systems,School of Energy and Power Engineering,Chongqing University,Chongqing 400044,People’s Republic of China Sibley School of Mechanical and Aerospace Engineering,Cornell University,Ithaca,NY 14853,USADepartment of Materials Science and Engineering,National University of Singapore,Singapore 117574,SingaporeMOE Key Laboratory of Low-Grade Energy Utilization Technologies and Systems,School of Energy and Power Engineering,Chongqing University,Chongqing 400044,People’s Republic of China
信息技术与安全科学
ThermocellThermosensitive crystallizationPorous carbon electrodePower densityLow-grade heat harvest
《Nano-Micro Letters》 2026 (4)
P.638-650,13
financially supported by research grants from Innovative Research Group Project of National Natural Science Foundation of China(52021004)the National Key Research and Development Program of China(2022YFB3803300)the National Natural Science Foundation of China(62474026,62205140,12204071)the China Postdoctoral Science Foundation(2022M710532)。
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