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

文献类型：期刊论文

作者Tang, Xiaodan3; Zhang, Bin4; Zhang, Xiao4; Wang, Shuxia3; Lu, Xu3; Han, Guang2; Wang, Guoyu1; Zhou, Xiaoyuan3,4
刊名ACS APPLIED MATERIALS & INTERFACES
出版日期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
DOI10.1021/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
WOS记录号WOS:000515214300054
出版者AMER CHEMICAL SOC
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.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
2.Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, 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.

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来源：重庆绿色智能技术研究院

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