Low-temperature sintering of Ag nanoparticles for high-performance thermoelectric module design

Li Yin, Fan Yang, Xin Bao, Wenhua Xue, Zhipeng Du, Xinyu Wang, Jinxuan Cheng, Hongjun Ji, Jiehe Sui, Xingjun Liu, Yumei Wang, Feng Cao, Jun Mao (), Mingyu Li (), Zhifeng Ren () and Qian Zhang ()
Additional contact information
Li Yin: Harbin Institute of Technology
Fan Yang: Harbin Institute of Technology
Xin Bao: Harbin Institute of Technology
Wenhua Xue: Harbin Institute of Technology
Zhipeng Du: Harbin Institute of Technology
Xinyu Wang: Harbin Institute of Technology
Jinxuan Cheng: Harbin Institute of Technology
Hongjun Ji: Harbin Institute of Technology
Jiehe Sui: Harbin Institute of Technology
Xingjun Liu: Harbin Institute of Technology
Yumei Wang: Chinese Academy of Sciences
Feng Cao: Harbin Institute of Technology
Jun Mao: Harbin Institute of Technology
Mingyu Li: Harbin Institute of Technology
Zhifeng Ren: University of Houston
Qian Zhang: Harbin Institute of Technology

Nature Energy, 2023, vol. 8, issue 7, 665-674

Abstract: Abstract To facilitate the development of thermoelectric modules for various operating temperature ranges, a connection technology that is suitable for heat-sensitive thermoelectric materials and capable of realizing both low-temperature connections and high-temperature service is required. Here we use low-temperature sintering of silver nanoparticles as an approach to connect the electrode and metallization layer of low- (Bi2Te3-based), medium- (PbTe-based) and high-temperature (half-Heusler-based) thermoelectric modules. Owing to the low melting point of Ag nanoparticles and the high stability in the sintered bulk, the processing temperature of the module is decoupled from the operating temperature, avoiding welding thermal stress. We demonstrate a conversion efficiency of ~11% at the temperature difference of 550 K for the PbTe-based module. Additionally, the module’s performance remains nearly unchanged throughout thermal cycling between hot-side temperatures of 593 and 793 K for 50 cycles. Our work accelerates the development of advanced modules for thermoelectric power generation.

Date: 2023
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DOI: 10.1038/s41560-023-01245-4

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