Enhancing the Thermoelectric Performance of p-Type Mg3Sb2 via Codoping of Li and Cd

doi:10.1021/acsami.9b23059

	Enhancing the Thermoelectric Performance of p-Type Mg3Sb2 via Codoping of Li and Cd
	Tang, Xiaodan 3; Zhang, Bin 4; Zhang, Xiao 4; Wang, Shuxia 3; Lu, Xu 3; Han, Guang 1; Wang, Guoyu 2; Zhou, Xiaoyuan 3,4
刊名	ACS APPLIED MATERIALS & INTERFACES
	2020-02-19
卷号	12 期号:7 页码:8359-8365
关键词	p-type Mg3Sb2 (Li, Cd) codoping carrier mobility thermal conductivity thermoelectric
ISSN号	1944-8244
DOI	10.1021/acsami.9b23059
通讯作者	Han, Guang(guang.han@cqu.edu.cn) ; Wang, Guoyu(guoyuw@cigit.ac.cn) ; Zhou, Xiaoyuan(xiaoyuan2013@cqu.edu.cn)
英文摘要	The Zintl compound Mg3Sb2 is a promising thermoelectric material with Earth-abundant components. Compared to its n-type counterpart, p-type Mg3Sb2 reveals lower dimensionless figure of merit (zT), principally due to the inferior electronic properties. Herein, p-type Mg3Sb2 materials codoped with Li and Cd have been synthesized via a ball milling plus hot pressing method, and their thermoelectric properties are systematically investigated within the temperature range 300-773 K. Li is found to be an effective hole dopant, which leads to a zT of 0.46 at 773 K in Mg2.99Li0.01Sb2 that doubles the zT of Mg3Sb2. Additional Cd doping further increases carrier mobility ascribed to the weakened polar covalent bonding and diminishes the lattice thermal conductivity simultaneously due to the introduced atomic mass contrast between Cd and Mg. Eventually, the optimized power factor combined with the reduced thermal conductivity has significantly improved the thermoelectric performance of p-type Mg3Sb2, with Mg(2.69)Li(0.01)Cd(0.5S)b(2) achieving a maximum zT of similar to 0.68 at 773 K and an average zT(ave) of similar to 0.32 over 300-773 K that compare very favorably to those of pristine Mg3Sb2. This study demonstrates that (Li, Cd) codoping is an effective strategy to enhance the thermoelectric properties of p-type Mg3Sb2 materials.
资助项目	National Natural Science Foundation of China[11344010] ; National Natural Science Foundation of China[11404044] ; National Natural Science Foundation of China[51472036] ; National Natural Science Foundation of China[51772035] ; National Natural Science Foundation of China[51802034] ; Fundamental Research Funds for the Central Universities[106112017CDJQJ308821] ; Fundamental Research Funds for the Central Universities[CQDXWL-2013-Z010] ; Fundamental Research Funds for the Central Universities[2018CDJDWL0011] ; Fundamental Research Funds for the Central Universities[2019CDQYCL003] ; Chongqing Foundation ; frontier research program[QYZDB-SSW-SLH016]
WOS研究方向	Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000515214300054
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/10567]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Han, Guang; Wang, Guoyu; Zhou, Xiaoyuan
作者单位	1.Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China 2.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 3.Chongqing Univ, Chongqing Key Lab Soft Condensed Matter Phys & Sm, Coll Phys, Chongqing 401331, Peoples R China 4.Chongqing Univ, Analyt & Testing Ctr, Chongqing 401331, Peoples R China
推荐引用方式 GB/T 7714	Tang, Xiaodan,Zhang, Bin,Zhang, Xiao,et al. Enhancing the Thermoelectric Performance of p-Type Mg3Sb2 via Codoping of Li and Cd[J]. ACS APPLIED MATERIALS & INTERFACES,2020,12(7):8359-8365.
APA	Tang, Xiaodan.,Zhang, Bin.,Zhang, Xiao.,Wang, Shuxia.,Lu, Xu.,...&Zhou, Xiaoyuan.(2020).Enhancing the Thermoelectric Performance of p-Type Mg3Sb2 via Codoping of Li and Cd.ACS APPLIED MATERIALS & INTERFACES,12(7),8359-8365.
MLA	Tang, Xiaodan,et al."Enhancing the Thermoelectric Performance of p-Type Mg3Sb2 via Codoping of Li and Cd".ACS APPLIED MATERIALS & INTERFACES 12.7(2020):8359-8365.