Rational design from materials to devices enables an efficiency of 10.5% based on thermoelectric (Bi, Sb)2Te3 and Mg3(Bi, Sb)2 for power generation

文献情報

出版日 2023-12-07

DOI 10.1039/D3EE03411A

インパクトファクター 38.532

著者

Yuxin Sun, Yuke Zhu, Hao Wu, Nuo Qu, Liangjun Xie, Jianbo Zhu, Zihang Liu, Qian Zhang, Wei Cai, Fengkai Guo, Jiehe Sui

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要旨

p-Type (Bi, Sb)2Te3 is the most excellent thermoelectric material near room temperature; however, the drastically declined performance makes it incapable of coping with low-grade waste heat recovery scenarios above 500 K. Herein, firstly, a great advance in thermoelectric performance is realized through reasonable composition control and microstructure design, including lithium acceptor doping to improve the electrical transport performance and subsequent Te addition to suppress the donor-like effect to further fine-tune the power factor, as well as the construction of dispersed nanopores, which leads to very low thermal conductivity. As a result, a highly competitive ZT of 1.42 at 373 K and a ZTave of 1.23 from 303 K to 523 K are achieved concurrently. Secondly, (Bi, Sb)2Te3 and its higher-temperature analogue Sb2Te3 are organized in a segmented structure by one-step sintering to broaden the temperature range. Similarly, optimized Mg3(Sb, Bi)2 materials with different high-performance temperature ranges are used to prepare the n-type segmented leg. Finally, a 2-pair module is fabricated, showing an efficiency of up to 10.5% and a power density of 0.53 W cm−2 with a temperature difference of 380 K. This work provides robust evidence for the high potential of (Bi, Sb)2Te3/Mg3(Bi, Sb)2 segmented modules for waste heat recovery.

掲載誌

Energy & Environmental Science

CiteScore: 32.34

自己引用率: 3.4%

年間論文数: 481

Energy & Environmental Science is an international journal dedicated to publishing exceptionally important and high quality, agenda-setting research tackling the key global and societal challenges of ensuring the provision of energy and protecting our environment for the future. The scope is intentionally broad and the journal recognises the complexity of issues and challenges relating to energy conversion and storage, alternative fuel technologies and environmental science. For work to be published it must be linked to the energy-environment nexus and be of significant general interest to our community-spanning readership. All scales of studies and analysis, from impactful fundamental advances, to interdisciplinary research across the (bio)chemical, (bio/geo)physical sciences and chemical engineering disciplines are welcomed. Topics include, but are not limited to, the following: Solar energy conversion and photovoltaics Solar fuels and artificial photosynthesis Fuel cells Hydrogen storage and (bio) hydrogen production Materials for energy systems Capture, storage and fate of CO2, including chemicals and fuels from CO2 Catalysis for a variety of feedstocks (for example, oil, gas, coal, biomass and synthesis gas) Biofuels and biorefineries Materials in extreme environments Environmental impacts of energy technologies Global atmospheric chemistry and climate change as related to energy systems Water-energy nexus Energy systems and networks Globally applicable principles of energy policy and techno-economics