Eco-Degradable and Flexible Solid-State Ionic Conductors by Clay-Nanoconfined DMSO Composites
- Authors
- Lee, Seunghyeon; Hwang, Hong Seop; Cho, Whirang; Jang, Daseul; Eom, Taesik; Martin, David C.; Wie, Jeong Jae; Shim, Bong Sup
- Issue Date
- May-2020
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- biodegradablecompositeseco-friendly materialsionic conductivitymontmorillonitenacre-mimeticsolid-state electrolytes
- Citation
- ADVANCED SUSTAINABLE SYSTEMS, v.4, no.5, pp.1 - 11
- Indexed
- SCIE
SCOPUS
- Journal Title
- ADVANCED SUSTAINABLE SYSTEMS
- Volume
- 4
- Number
- 5
- Start Page
- 1
- End Page
- 11
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/190712
- DOI
- 10.1002/adsu.201900134
- ISSN
- 2366-7486
- Abstract
- Solid-state electrolytes can alleviate the safety issues of electrochemical energy systems related to chemical and thermal instabilities of liquid electrolytes. While a liquid provides seamless ionic transport with almost perfect wettability between electrodes, a solid-state electrolyte needs to demonstrate at least comparable electrochemical performance to liquid electrolytes as well as mechanical robustness and flexibility. Here, the facile preparation of montmorillonite (MMT)/dimethyl sulfoxide (DMSO) nanocomposites is reported, which show high ionic conductivities, mechanical strengths, and thermal stabilities by forming nacre-mimetic "brick-and-mortar" structures. The molecularly confined structures of DMSO are confirmed by X-ray diffraction peaks with d-spacings of interplanar spacing that are slightly larger than MMTs. The MMT/DMSO composites have mechanical strengths and toughnesses of 55.3 +/- 4.8 MPa and 210.2 +/- 32.6 kJ m(-2), respectively. The ionic conductivity is approximate to 2 x 10(-4) S cm(-1) at room temperature, and their thermal stability is in the range of -100 to 120 degrees C. The optical translucency, on-demand eco-degradability, and solution processability together make the MMT/DMSO composites unique materials with a wide range of solid-state electrochemical applications including batteries.
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