Akbar, Zico Alaia Malik, Yoga Trianzar Kim, Dong-Hu Cho, Sangho Jang, Sung-Yeon Jeon, Ju-Won 2024-01-19T12:30:18Z 2024-01-19T12:30:18Z 2022-04-14 2022-04 1613-6810 https://pubs.kist.re.kr/handle/201004/115465 The advancement of wearable electronics, particularly self-powered wearable electronic devices, necessitates the development of efficient energy conversion technologies with flexible mechanical properties. Recently, ionic thermoelectric (TE) materials have attracted great attention because of their enormous thermopower, which can operate capacitors or supercapacitors by harvesting low-grade heat. This study presents self-healable, stretchable, and flexible ionic TE composites comprising an ionic liquid (IL), 1-ethyl-3-methylimidazolium trifluoromethanesulfonate (EMIM:OTf); a polymer matrix, poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP); and a fluoro-surfactant (FS). The self-healability of the IL-based composites originates from dynamic ion-dipole interactions between the IL, the PVDF-HFP, and the FS. The composites demonstrate excellent ionic TE properties with an ionic Seebeck coefficient (S-i) of approximate to 38.3 mV K-1 and an ionic figure of merit of ZT(i) = 2.34 at 90% relative humidity, which are higher than the values reported for other IL-based TE materials. The IL-based ionic TE composites developed in this study can maintain excellent ionic TE properties under harsh conditions, including severe strain (75%) and multiple cutting-healing cycles. English Wiley - V C H Verlag GmbbH & Co. Self-Healable and Stretchable Ionic-Liquid-Based Thermoelectric Composites with High Ionic Seebeck Coefficient Article 10.1002/smll.202106937 1 Small, v.18, no.17 Small 18 17 N scie scopus 000773566200001 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article; Early Access CRYSTAL-STRUCTURE ELECTROLYTES ionic liquid-based composites ionic thermoelectrics self-healing materials stretchable composites