Ultrahigh Power Factor in Thermoelectric System Nb0.95 M0.05 FeSb (M = Hf, Zr, and Ti)

Advanced Science
Wuyang RenZhifeng Ren

Abstract

Conversion efficiency and output power are crucial parameters for thermoelectric power generation that highly rely on figure of merit ZT and power factor (PF), respectively. Therefore, the synergistic optimization of electrical and thermal properties is imperative instead of optimizing just ZT by thermal conductivity reduction or just PF by electron transport enhancement. Here, it is demonstrated that Nb0.95Hf0.05FeSb has not only ultrahigh PF over ≈100 µW cm-1 K-2 at room temperature but also the highest ZT in a material system Nb0.95M0.05FeSb (M = Hf, Zr, Ti). It is found that Hf dopant is capable to simultaneously supply carriers for mobility optimization and introduce atomic disorder for reducing lattice thermal conductivity. As a result, Nb0.95Hf0.05FeSb distinguishes itself from other outstanding NbFeSb-based materials in both the PF and ZT. Additionally, a large output power density of ≈21.6 W cm-2 is achieved based on a single-leg device under a temperature difference of ≈560 K, showing the realistic prospect of the ultrahigh PF for power generation.

References

Jul 31, 1999·Science·F J DiSalvo
Feb 7, 2004·Science·Kuei Fang HsuMercouri G Kanatzidis
Jan 26, 2008·Nature Materials·G Jeffrey Snyder, Eric S Toberer
Jun 8, 2010·Journal of the American Chemical Society·Jiaqing HeVinayak P Dravid
Dec 29, 2010·Nano Letters·Xiao YanZ F Ren
Dec 1, 2011·Journal of the American Chemical Society·Li-Dong ZhaoMercouri G Kanatzidis
Mar 13, 2012·Nature Materials·Huili LiuG Jeffrey Snyder
Sep 22, 2012·Nature·Kanishka BiswasMercouri G Kanatzidis
May 8, 2013·Journal of the American Chemical Society·Li-Dong ZhaoMercouri G Kanatzidis
Jun 24, 2015·Proceedings of the National Academy of Sciences of the United States of America·Hee Seok KimZhifeng Ren
Nov 20, 2016·Proceedings of the National Academy of Sciences of the United States of America·Ran HeZhifeng Ren
Jan 5, 2017·Nature Communications·Zhiwei ChenYanzhong Pei
Mar 7, 2017·Advanced Materials·Tiejun ZhuXinbing Zhao
Nov 14, 2012·Nanomaterials·Wenjie XieTerry M Tritt
Sep 20, 2017·Proceedings of the National Academy of Sciences of the United States of America·Jun MaoZhifeng Ren
Oct 2, 2017·The Review of Scientific Instruments·Qing ZhuZhifeng Ren

❮ Previous
Next ❯

Citations

Aug 16, 2018·Physical Chemistry Chemical Physics : PCCP·Yefan TianJoseph H Ross
Oct 15, 2019·ACS Applied Materials & Interfaces·Shan LiQian Zhang

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.