Side-Chain Engineered P Or N-Type Nonaqueous Polymeric Ionic Gels for Sustainable Ionic Thermoelectrics
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SCOPUS
- Title
- Side-Chain Engineered P Or N-Type Nonaqueous Polymeric Ionic Gels for Sustainable Ionic Thermoelectrics
- Authors
- Kim, Sungryong; Ham, Mirim; Lee, Junwoo; Kim, Jeongsu; Lee, Hyunjung; Park, Taiho
- Date Issued
- 2023-12
- Publisher
- WILEY-V C H VERLAG GMBH
- Abstract
- Although ionic hydrogels have been developed recently for innovative wearable electronics, they necessitate high humidity to diffuse ions in water and fast self-healing, which negatively impacts their performance and stability in ambient conditions (e.g., dry environments). In this study, a series of p- and n-type polymeric ionic gels (PIGs) with different ratios of ionic side chains are synthesized to allow only single-type ions to pass through them. The results demonstrate that the repeatedly stretchable PIGs are transparent, thermally robust up to 125 & DEG;C, and self-healing. Among the series of PIGs, p- and n-type PIGs with 75% ion moieties (P75 and N75) exhibit the optimum ionic conductivity (& sigma;i) (4.1 x 10-4 and 2.7 x 10-4 S cm-1) and ionic Seebeck coefficients (Si) (5.84, and -4.18 mV K-1) under ambient conditions (25 & DEG;C and relative humidity (RH) of 30%), resulting in ZTi values of 1.87 x 10-3 and 1.18 x 10-3. Moreover, the & sigma;i and Si of PIGs are almost consistent under extremely low RH 10%. Accordingly, P(([EMIM+][SPA])0.75-r-MA0.25) (P75) and P(([APTA][TFSI-])0.75-r-MA0.25) (N75) are used to achieve stretchable ionic thermoelectrics (iTEs) with stable operability under ambient conditions (RH of 30%), satisfying all of the requirements. The iTEs with five pairs of p/n couples exhibit a thermovoltage of up to & SIM;0.8 V. Nonaqueous ionic thermoelectric (iTE) materials are proposed by synthesizing the p-/n-type polymeric ionic gels (PIGs) (P([EMIM+][SPA]-r-MA) and P([APTA][TFSI-]-r-MA)), respectively. They enable a thermo-diffusion of only single-type ions by immobile charged side chains in PIGs. The p-/n-type PIGs with 75% ion moieties are applied to the iTEs, which exhibit stretchable and self-healing properties under ambient conditions as well as consistent thermal and mechanical stabilities.image
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/123618
- DOI
- 10.1002/adfm.202305499
- ISSN
- 1616-301X
- Article Type
- Article
- Citation
- ADVANCED FUNCTIONAL MATERIALS, vol. 33, no. 52, 2023-12
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