Sustainable geopolymer concrete for thermoelectric energy harvesting

被引：9

作者：

Barzegar M. ^{[1
]}

Goracci G. ^{[1
]}

Martauz P. ^{[2
]}

Dolado J.S. ^{[1
,3
]}

机构：

[1] Centro de Física de Materiales, CSIC-UPV/EHU, Paseo Manuel de Lardizábal 5, Donostia-San Sebastián

[2] Považská Cementáreň Cement Plant (PCLA), Ulica Janka Kráľa, Ladce

[3] Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, Donostia-San Sebastián

来源：

Construction and Building Materials | 2024年 / 411卷

关键词：

Energy harvesting; Geopolymer; Seebeck coefficient; Thermoelectric cement concrete;

D O I：

10.1016/j.conbuildmat.2023.134398

中图分类号：

学科分类号：

摘要：

Concrete is a widely used material that presents vast opportunities for energy harvesting applications. Among these, thermoelectric concrete shows promising potential for harvesting waste heat generated in urban and industrial environments. However, the development of thermoelectric concrete poses several challenges that need to be addressed, such as the need to accurately account for the intrinsic voltage. This factor is frequently disregarded, but it has a significant impact on the measurement of thermoelectric properties in improving the intrinsically low electrical conductivity and Seebeck coefficient. In this context, this study evaluates the performance of industrially scalable geopolymer-based concrete that incorporates recycled aggregates as low-cost and environmentally friendly additives for thermoelectric energy harvesting applications. The concrete exhibited an intrinsic voltage of 15 mV, and a new test protocol was proposed to exclude its impact on thermoelectric measurements. The geopolymer concrete demonstrated a significantly high Seebeck coefficient of 570 µV/k, surpassing all previously reported values for geopolymer-based materials. Furthermore, it was discovered that the thermoelectric behavior of geopolymer-based concrete is of ionic origin, indicating that further improvements can be made by adjusting the pore solution chemistry. This finding suggests that there is ample opportunity for innovation and optimization in the development of thermoelectric concrete. © 2023 The Authors

引用

共 50 条

[1]

Ying P., Wilkens L., Reith H., Rodriguez N.P., Hong X., Lu Q., Hess C., Nielsch K., He R., A robust thermoelectric module based on MgAgSb/Mg3(Sb,Bi)2 with a conversion efficiency of 8.5% and a maximum cooling of 72 K, Energy Environ. Sci., 15, pp. 2557-2566, (2022)

[2]

Ying P., Reith H., Nielsch K., He R., Geometrical optimization and thermal-stability characterization of Te-free thermoelectric modules based on MgAgSb/Mg3(Bi,Sb)2, Small, 18, (2022)

[3]

Liang Z., Xu C., Song S., Shi X., Ren W., Ren Z., Enhanced thermoelectric performance of p-Type Mg3Sb2 for reliable and low-cost all-Mg3Sb2-based thermoelectric low-grade heat recovery, Adv. Funct. Mater., (2022)

[4]

Shang H., Zou Q., Zhang L., Liang Z., Song S., Hong B., Gu H., Ren Z., Ding F., Improving thermal stability and revealing physical mechanism in n-type Mg3Sb2-xBix for practical applications, Nano Energy, 109, (2023)

[5]

Cao J., Dong J., Saglik K., Zhang D., Solco S.F.D., You I.J.W.J., Liu H., Zhu Q., Xu J., Wu J., Wei F., Yan Q., Suwardi A., Non-equilibrium strategy for enhancing thermoelectric properties and improving stability of AgSbTe2, Nano Energy, 107, (2023)

[6]

Sun M., Li Z., Mao Q., Shen D., (1998)

[7]

Wen S., Chung D.D.L., (1999)

[8]

Liu X., Qu M., Nguyen A.P.T., Dilley N.R., Yazawa K., Characteristics of new cement-based thermoelectric composites for low-temperature applications, Constr. Build. Mater., 304, (2021)

[9]

Wen S., Chung D.D.L.

[10]

Singh V.P., Kumar M., Srivastava R.S., Vaish R., Thermoelectric energy harvesting using cement-based composites: a review, Mater. Today Energy, 21, (2021)

← 1 2 3 4 5 →