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Significantly optimized thermoelectric properties in high-symmetry cubic Cu7PSe6 compounds via entropy engineering

文献类型：期刊论文

作者Chen, Rui1; Qiu, Pengfei; Jiang, Binbin1; Hu, Ping1; Zhang, Yiming2; Yang, Jiong2; Ren, Dudi; Shi, Xun; Chen, Lidong
刊名JOURNAL OF MATERIALS CHEMISTRY A
出版日期2018
卷号6期号:15页码:6493
ISSN号2050-7488
DOI10.1039/c8ta00631h
英文摘要High-symmetry crystal structures are preferred for thermoelectrics because high structural symmetry usually yields good electron transport properties. Entropy engineering is an effective approach to improve the structural symmetry of low-symmetry materials, and thus to enhance their thermoelectric performance. In this study, via introducing Te into the argyrodite-type compound Cu7PSe6, the configurational entropy is significantly increased to successfully improve its initial low-symmetry cubic structure (P2(1)3) to the high-symmetry cubic structure (F (4) over bar 3m)at room temperature. Such improved structural symmetry leads to a high density-of-state effective mass but similar carrier mobility in the same carrier concentration range as compared with the pristine Cu7PSe6. Thus, significantly optimized electron transport properties are achieved in the Te-alloyed Cu7PSe6 samples. In particular, at room temperature, the power factor of the high-symmetry cubic Cu7PSe5.7Te0.3 sample is about 15-times higher than that of the low-symmetry Cu7PSe6 matrix. Combining the well-maintained ultralow lattice thermal conductivity, a maximum ZT of around 0.55 at 600 K is obtained in Cu7PSe5.7Te0.3. This work strongly shows that entropy engineering using multiple components is a very powerful strategy to discover or design novel high-performance TE materials starting from low-symmetry compounds.
学科主题Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
WOS记录号WOS:000430368900037
出版者ROYAL SOC CHEMISTRY
资助机构This work was financially supported by the National Natural Science Foundation of China (NSFC) under the No. 51472262 and 51625205, the Key Research Program of Chinese Academy of Sciences (Grant No. KFZD-SW-421), the International S&T Cooperation Program of China (2015DFA51050), and the Shanghai Government (Grant No. 15JC1400301). PF thanks Youth Innovation Promotion Association, CAS (Grant No. 2016232). ; This work was financially supported by the National Natural Science Foundation of China (NSFC) under the No. 51472262 and 51625205, the Key Research Program of Chinese Academy of Sciences (Grant No. KFZD-SW-421), the International S&T Cooperation Program of China (2015DFA51050), and the Shanghai Government (Grant No. 15JC1400301). PF thanks Youth Innovation Promotion Association, CAS (Grant No. 2016232).
源URL[http://ir.sic.ac.cn/handle/331005/24977]  
专题中国科学院上海硅酸盐研究所
作者单位1.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
2.Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China
3.Shanghai Univ, Mat Genome Inst, 99 Shangda Rd, Shanghai 200444, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Rui,Qiu, Pengfei,Jiang, Binbin,et al. Significantly optimized thermoelectric properties in high-symmetry cubic Cu7PSe6 compounds via entropy engineering[J]. JOURNAL OF MATERIALS CHEMISTRY A,2018,6(15):6493, 6502.
APA Chen, Rui.,Qiu, Pengfei.,Jiang, Binbin.,Hu, Ping.,Zhang, Yiming.,...&Chen, Lidong.(2018).Significantly optimized thermoelectric properties in high-symmetry cubic Cu7PSe6 compounds via entropy engineering.JOURNAL OF MATERIALS CHEMISTRY A,6(15),6493.
MLA Chen, Rui,et al."Significantly optimized thermoelectric properties in high-symmetry cubic Cu7PSe6 compounds via entropy engineering".JOURNAL OF MATERIALS CHEMISTRY A 6.15(2018):6493.

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来源：上海硅酸盐研究所

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