Mobile menu

Dec. 2, 2024 Seminar Speech

  • 列印
會員評等：  / 0
差佳 
詳細內容
上層分類：News
分類：Speeches
建立於 2024-11-27, 週三 11:14
最近更新於 2024-11-27, 週三 11:19
發佈於：2024-11-27, 週三 11:19
點擊數：446

Speaker: Dr. Tsuyohiko Fujigaya

Topic: Preparation of Thermoelectric Generators using SWCNT Sheets

Time: Dec. 2, 2024 10:20-12:10 AM

Location: Room 102, Boya Lecture Building

Abstract:

Thermoelectric generators (TEGs) using thermoelectric (TE) materials are attractive because they do not require moving parts and can generate electricity silently by using a temperature gradient. A TEG module is the -shaped assembly of alternating p-type and n-type TE materials, which are connected electrically in series and thermally in parallel. Single-walled carbon nanotubes (SWCNTs) are promising TE materials because of their high electrical conductivity and Seebeck coefficient. An advantage of using SWCNTs for TEGs is their bendability, which imparts flexibility or even stretchability to the device. Therefore, a TEG module that can cover the surface of heat sources and take complete advantage of ubiquitous waste heat, such as body heat, has been the target of the CNT-based TEG. Recent studies revealed that the zT of SWCNT-based materials is still lower than 0.3, thus, a large integration of the p- and n-type CNT legs is vital to achieve considerable power generation. To construct a TEG employing SWCNTs, the development of n-type regions within a single piece of p-type SWCNTs has gained interest, offering a seamless TEG structure without the need for metal electrodes to bridge the p- and n-type regions.[1-3] To achieve p/n patterns with high special resolution, we developed patterning methods including thermal deposition of n-dopant precursor [4] and photoinduced doping [5, 6] as the substitutes for traditional drop casting method. In this seminar, detail procedure of these techniques as well as the principle of air-stable n-doping of SWCNT will be explained.

References: [1] T. Sun, Nat. Commun. 11, 572 (2020). [2] J. Choi, ACS Nano 11, 7608 (2017).
[3] W. Zhou, Nat. Commun. 8, 14886 (2017). [4] T. Fujigaya, J. Mater. Chem. A, 9, 12188 [5] T. Fujigaya, (2021) J. Mater. Chem. A 11, 6909 (2023). [6] T. Fujigaya, J. Mater. Chem. A 11, 23278 (2023).

About the Speaker:

Service Unit: Department of Applied Chemistry, Faculty of Engineering, Kyushu University

Title: Professor

Education and Work Experience: 

2018–present  Professor in Kyushu University, Department of Applied Chemistry, Faculty of Engineering 
2011–2017  Associate Professor in Kyushu University, Department of Applied Chemistry, Faculty of Engineering 
2007–2011  Guest Associate Professor in Kyushu University, Department of Applied Chemistry, Faculty of Engineering 
2006–2007  Postdoctoral Associate in Kyusyu University
2005–2006 Postdoct o ral Associate in Northwestern University, Chemistry Department
2002–2005 Ph. D. in Department of Chemistry and Biotechnology School of Engineering, Tokyo University
2000–2002 M. S. in Department of Organic and Polymeric Materials, Tokyo Institute of Technology
1996–2000 B. S. in Department of Polymer Chemistry, Tokyo Institute of Technology

Awards:

2009  Award for Encouragement of Research in Polymer Science; The Society of Polymer Science, Japan 
2013  2013 Iijima Award; The Fullerenes, Nanotubes and Graphene Research Society 
2016  MMS Award, TANAKA Kikinzoku 
2017  Research Award, TANAKA Kikinzoku 
2022 Showa Denko Materials Award; The Society of Polymer Science, Japan