Artyukhov Denis, Kiselev Nikolay, Boychenko Elena, Asmolova Aleksandra, Zheleznov Denis, Artyukhov Ivan, Burmistrov Igor, Gorshkov Nikolay
Department of Power and Electrical Engineering, Yuri Gagarin State Technical University of Saratov, 77 Polytecnicheskaya Street, 410054 Saratov, Russia.
Department of Chemistry and Technology of Materials, Yuri Gagarin State Technical University of Saratov, 77 Polytecnicheskaya Street, 410054 Saratov, Russia.
Nanomaterials (Basel). 2023 Aug 9;13(16):2290. doi: 10.3390/nano13162290.
Effective low-grade waste heat harvesting and its conversion into electric energy by the means of thermoelectrochemical cells (TECs) are a strong theme in the field of renewable energy investigation. Despite considerable scientific research, TECs have not yet been practically applied due to the high cost of electrode materials and low effectiveness levels. A large hypothetical Seebeck coefficient allow the harvest of the low-grade waste heat and, particularly, to use TECs for collecting human body heat. This paper demonstrates the investigation of estimated hypothetical Seebeck coefficient dependency on KOH electrolyte concentration for TECs with hollow nanostructured Ni/NiO microsphere electrodes. It proposes a thermoelectrochemical cell with power density of 1.72 W·m and describes the chemistry of electrodes and near-electrode space. Also, the paper demonstrates a decrease in charge transfer resistance from 3.5 to 0.52 Ω and a decrease in capacitive behavior with increasing electrolyte concentration due to diffusion effects.
通过热电化学电池（TEC）有效地收集低品位废热并将其转化为电能是可再生能源研究领域的一个重要课题。尽管进行了大量的科学研究，但由于电极材料成本高和效率水平低，TEC尚未得到实际应用。较大的假设塞贝克系数有利于收集低品位废热，特别是利用TEC收集人体热量。本文展示了对具有空心纳米结构Ni/NiO微球电极的TEC，其假设塞贝克系数与KOH电解质浓度相关性的研究。提出了一种功率密度为1.72 W·m的热电化学电池，并描述了电极和近电极空间的化学性质。此外，本文还表明，由于扩散效应，随着电解质浓度的增加，电荷转移电阻从3.5 Ω降至0.52 Ω，电容行为也有所降低。
