期刊
ADVANCED ENERGY MATERIALS
卷 -, 期 -, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.202202987
关键词
boosted output voltage; coupled effects; C-60-containing block polyimide; thermoelectric generators; triboelectric charges
类别
资金
- National Research Foundation of Korea (NRF) - Korean government [NRF-2019R1A2C2009822]
- National Research Foundation of Korea (NRF) - Ministry of Science and ICT [2021M3C1C3097688]
- Ministry of Trade, Industry & Energy, Republic of Korea [20214000000590]
- Human Resources Program in Energy Technology of the Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Korea Institute of Energy Technology Evaluation & Planning (KETEP) [20214000000590] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2021M3C1C3097688] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this study, the output voltage of a thermoelectric generator was enhanced by introducing highly charged polyimide-based dielectrics. The electric potential difference across the thermoelectric generator was significantly increased by attaching a block of polyimide containing high charge density, and this increase was maintained for a prolonged period of time.
The present work demonstrates the very first approach to enhancing the output voltage of a thermoelectric generator by introducing highly charged polyimide-based dielectrics. High charge density over 320 mu C m(-2) in C-60-containing block polyimide (PI-b-C-60) having excellent charge retention characteristics is obtained through an ion injection process, attached at the cooling part of a thermoelectric generator consisting of Cu/p-type BiSbTe/Au/Cr/SiO2/Si. This significantly increases the electric potential difference across the thermoelectric generator (TEG) from 4.2 to 8.2 mV at the temperature difference of 20 K, and this increase can be maintained over 1 day. Density functional theory studies support that the enhancement depends on the dielectric constant and the insulating properties of the dielectric. Finally, a TEG consisting of 81 p-type BiSbTe legs with PI-b-C-60 generates an output voltage of 0.632 V, and the charged energy of the 10 mF-capacitor is boosted by 30 s. These results demonstrate the possibility of large-area TEG fabrication without the need for modification of the TE materials by introducing a new mechanism which is based on the coupling effect between thermoelectric carriers and triboelectric charges.
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