气候变化领域集成服务门户(CCPortal): High thermoelectric performance of α-MgAgSb for power generation

CCPortal

DOI	10.1039/c7ee02504a
	High thermoelectric performance of α-MgAgSb for power generation
	Liu Z.; Mao J.; Sui J.; Ren Z.
发表日期	2018
ISSN	17545692
起始页码	23
结束页码	44
卷号	11 期号:1
英文摘要	Solid-state thermoelectric devices enable the conversion of waste heat and solar energy into electricity, providing an alternative route for energy harvesting to tackle the challenges of energy sustainability. α-MgAgSb-based materials have recently gained popular attention as a new promising p-type candidate for low-temperature (between room temperature and 550 K) applications. A high figure of merit (ZT) of 1.2-1.4 at 550 K was achieved, along with experimental demonstration of a record high conversion efficiency of ∼8.5% under a cold- and hot-side temperature difference of 225 K, which holds the realistic prospect for power generation. In this review, we summarize the recent progress in both material-level understanding and device-level measurement of the α-MgAgSb system. First, the phase transitions and common fabrication methods are briefly introduced. Then, the origin of the "phonon glass electron crystal" behavior of α-MgAgSb is thoroughly elucidated with regard to some critical factors, such as the crystal structure, lattice dynamic properties, defect chemistry, microstructure, and band structure. Afterwards, the effective strategies to further enhance the ZT are illustrated, including optimizing the carrier concentration and intrinsic defect engineering. In addition, other feasible methods in theory are also presented. Finally, the conversion efficiency on a single-leg device is presented. In the outlook section, the currently unsolved questions as well as future directions and challenges for this material system are discussed. © The Royal Society of Chemistry.
英文关键词	Carrier concentration; Conversion efficiency; Crystal microstructure; Defects; Energy harvesting; Solar energy; Temperature; Thermoelectricity; Waste heat; Alternative routes; Energy sustainability; Experimental demonstrations; High conversion efficiency; Phonon-glass electron-crystals; Temperature differences; Thermoelectric devices; Thermoelectric performance; Crystal structure; concentration (composition); crystal; efficiency measurement; electricity; glass; instrumentation; optimization; performance assessment; power generation; solar power; waste
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190342
作者单位	State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China; Department of Physics and TcSUH, University of Houston, Houston, TX 77204, United States; Department of Mechanical Engineering, University of Houston, Houston, TX 77204, United States
推荐引用方式 GB/T 7714	Liu Z.,Mao J.,Sui J.,et al. High thermoelectric performance of α-MgAgSb for power generation[J],2018,11(1).
APA	Liu Z.,Mao J.,Sui J.,&Ren Z..(2018).High thermoelectric performance of α-MgAgSb for power generation.Energy & Environmental Science,11(1).
MLA	Liu Z.,et al."High thermoelectric performance of α-MgAgSb for power generation".Energy & Environmental Science 11.1(2018).