TY - JOUR
T1 - Recent Studies on the Environmentally Benign Alkaline-Earth Silicide Mg2Si for Middle-Temperature Thermoelectric Applications
AU - Shiojiri, Daishi
AU - Iida, Tsutomu
AU - Hirayama, Naomi
AU - Imai, Yoji
AU - Sugawara, Hiroharu
AU - Kusaka, Jin
N1 - Funding Information:
This study was partly supported by research grants from the Japan Society for the Promotion of Science KAKENHI (Grant Numbers 19H00772 and 20H02137); Council for Science, Technology, and Innovation; Cross-Ministerial Strategic Innovation Promotion Program; “Innovative Combustion Technology” (funding agency: Japan Science and Technology Agency (JST)); JST-Mirai Program (Grant Number JPMJMI19A1).The work presented in this paper is supported by Yoji Imai (Tokyo University of Science) and Naomi Hirayama (Shimane University), Keisuke Yokota (Waseda University), Takahide Motegi (Waseda University), Hirofumi Tsuchida (Nissan Motor Co., Ltd.), Yasuhiko Izumi (Honda R&D Co., Ltd.), Kei Yoshimura (Suzuki Co., Ltd.), and Toshihiro Shibata (Sango Co., Ltd.). The authors also thank the Nagoya University Information Technology Center for allowing the use of their facilities.
Funding Information:
Funding: This study was partly supported by research grants from the Japan Society for the Promotion of Science KAKENHI (Grant Numbers 19H00772 and 20H02137); Council for Science, Technology, and Innovation; Cross-Ministerial Strategic Innovation Promotion Program; “Innovative Combustion Technology” (funding agency: Japan Science and Technology Agency (JST)); JST-Mirai Program (Grant Number JPMJMI19A1).
Funding Information:
Acknowledgments: The work presented in this paper is supported by Yoji Imai (Tokyo University of Science) and Naomi Hirayama (Shimane University), Keisuke Yokota (Waseda University), Takahide Motegi (Waseda University), Hirofumi Tsuchida (Nissan Motor Co., Ltd.), Yasuhiko Izumi (Honda R&D Co., Ltd.), Kei Yoshimura (Suzuki Co., Ltd.), and Toshihiro Shibata (Sango Co., Ltd.). The authors also thank the Nagoya University Information Technology Center for allowing the use of their facilities.
Publisher Copyright:
© 2022 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2022/7/1
Y1 - 2022/7/1
N2 - Most primary energy sources, such as the fossil fuels of oil, coal, and natural gas, produce waste heat. Recycling of this unused thermal energy is necessary in order to increase the efficiency of usage. Thermoelectric (TE) conversion technologies, by which waste heat is directly converted into electricity, have been extensively studied, and the development of these technologies has continued. TE power-generation has attracted significant attention for use in self-powered wireless sensors, which are important for our increasingly sophisticated information society. For the middle-temperature range (i.e., 600–900 K), with applications such as automobiles, intensive studies of high-performance TE materials have been conducted. In this study, we review our recent experimental and theoretical studies on alkaline-earth silicide Mg2Si TE materials, which consist of nontoxic abundant earth elements. We demonstrate improvements in TE performance brought about by lightly doping Mg2Si with isoelectronic impurities. Furthermore, we examine the electrode formation and material coatings. Finally, we simulate the exhaust heat requirements for the practical application of TE generators.
AB - Most primary energy sources, such as the fossil fuels of oil, coal, and natural gas, produce waste heat. Recycling of this unused thermal energy is necessary in order to increase the efficiency of usage. Thermoelectric (TE) conversion technologies, by which waste heat is directly converted into electricity, have been extensively studied, and the development of these technologies has continued. TE power-generation has attracted significant attention for use in self-powered wireless sensors, which are important for our increasingly sophisticated information society. For the middle-temperature range (i.e., 600–900 K), with applications such as automobiles, intensive studies of high-performance TE materials have been conducted. In this study, we review our recent experimental and theoretical studies on alkaline-earth silicide Mg2Si TE materials, which consist of nontoxic abundant earth elements. We demonstrate improvements in TE performance brought about by lightly doping Mg2Si with isoelectronic impurities. Furthermore, we examine the electrode formation and material coatings. Finally, we simulate the exhaust heat requirements for the practical application of TE generators.
KW - energy conversion
KW - renewable energy
KW - silicides
KW - thermoelectricity
KW - waste heat recovery
UR - http://www.scopus.com/inward/record.url?scp=85133714494&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85133714494&partnerID=8YFLogxK
U2 - 10.3390/en15134859
DO - 10.3390/en15134859
M3 - Article
AN - SCOPUS:85133714494
SN - 1996-1073
VL - 15
JO - Energies
JF - Energies
IS - 13
M1 - 4859
ER -
