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Liu C, Zhang Z, Peng Y, Li F, Miao L, Nishibori E, Chetty R, Bai X, Si R, Gao J, Wang X, Zhu Y, Wang N, Wei H, Mori T. Charge transfer engineering to achieve extraordinary power generation in GeTe-based thermoelectric materials. SCIENCE ADVANCES 2023; 9:eadh0713. [PMID: 37126545 PMCID: PMC10132743 DOI: 10.1126/sciadv.adh0713] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
By the fine manipulation of the exceptional long-range germanium-telluride (Ge─Te) bonding through charge transfer engineering, we have achieved exceptional thermoelectric (TE) and mechanical properties in lead-free GeTe. This chemical bonding mechanism along with a semiordered zigzag nanostructure generates a notable increase of the average zT to a record value of ~1.73 in the temperature range of 323 to 773 K with ultrahigh maximum zT ~ 2.7. In addition, we significantly enhanced the Vickers microhardness numbers (Hv) to an extraordinarily high value of 247 Hv and effectively eliminated the thermal expansion fluctuation at the phase transition, which was problematic for application, by the present charge transfer engineering process and concomitant formation of microstructures. We further fabricated a single-leg TE generator and obtained a conversion efficiency of ~13.4% at the temperature difference of 463 K on a commercial instrument, which is located at the pinnacle of TE conversion.
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Affiliation(s)
- Chengyan Liu
- Guangxi Key Laboratory of Information Materials, Engineering Research Center of Electronic Information Materials and Devices, Ministry of Education, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
| | - Zhongwei Zhang
- School of Chemistry and Chemical Engineering and School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China
| | - Ying Peng
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba 305-0044, Japan
- Guangxi Key Laboratory of Precision Navigation Technology and Application, School of Information and Communication, Guilin University of Electronic Technology, Guilin 541004, China
| | - Fucong Li
- Guangxi Key Laboratory of Information Materials, Engineering Research Center of Electronic Information Materials and Devices, Ministry of Education, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
| | - Lei Miao
- Guangxi Key Laboratory of Information Materials, Engineering Research Center of Electronic Information Materials and Devices, Ministry of Education, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
| | - Eiji Nishibori
- Department of Physics, Faculty of Pure and Applied Science, Tsukuba Research Center for Energy Materials Science (TREMS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8576, Japan
| | - Raju Chetty
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba 305-0044, Japan
| | - Xiaobo Bai
- Guangxi Key Laboratory of Information Materials, Engineering Research Center of Electronic Information Materials and Devices, Ministry of Education, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
| | - Ruifan Si
- Guangxi Key Laboratory of Information Materials, Engineering Research Center of Electronic Information Materials and Devices, Ministry of Education, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
| | - Jie Gao
- Guangxi Key Laboratory of Information Materials, Engineering Research Center of Electronic Information Materials and Devices, Ministry of Education, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
| | - Xiaoyang Wang
- Guangxi Key Laboratory of Information Materials, Engineering Research Center of Electronic Information Materials and Devices, Ministry of Education, School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
| | - Yanqiu Zhu
- School of Chemistry and Chemical Engineering and School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China
| | - Nannan Wang
- School of Chemistry and Chemical Engineering and School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China
| | - Haiqiao Wei
- State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
| | - Takao Mori
- International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba 305-0044, Japan
- Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
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