| 학회 |
한국화학공학회 |
| 학술대회 |
2022년 봄 (04/20 ~ 04/23, 제주국제컨벤션센터) |
| 권호 |
28권 1호, p.500 |
| 발표분야 |
[주제 8] 에너지 저장 |
| 제목 |
Polymer Interface-Dependent Shape Transition toward Two-Dimensional Inorganic Nanocoins for Stable Lithium−Sulfur Batteries |
| 초록 |
With their spatial characteristics and high porosity, two-dimensional (2D) porous inorganic nanomaterials have intriguing capabilities, yet the controlled manufacture of circular 2D forms remains a challenge. We developed a facile method for making 2D porous inorganic nanocoins (NCs) by combining block copolymer (BCP) self-assembly and microdomain orientation control at polymer-polymer interfaces. BCP and homopoly(methyl methacrylate) (hPMMA) multi-component blends are designed for macrophase separation followed by microphase separation. BCP's balanced interfacial compatibility permits perpendicularly oriented lamellar assembly at the interfaces between the BCP-rich phase and the hPMMA matrix. Calcination and disassembly of lamellar structures create ultrathin 2D inorganic NCs pierced by micropores. An ultrathin and lightweight functional separator for lithium-sulfur batteries is made from 2D porous and acidic aluminosilicate NC (AS-NC). The AS-NC layer works as an ionic sieve, blocking lithium polysulfides selectively. Polysulfides are chemically captured by abundant acid sites, and micropores physically exclude them, resulting in improved sulfur usage and cycle stability. |
| 저자 |
반민경1, 김성섭2, 임원광1, 임현애3, 한정우3, 이지성1, 황종국4, 이진우1
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| 소속 |
1한국과학기술원, 2전북대, 3포항공과대, 4아주대 |
| 키워드 |
에너지 환경(Energy and Environment) |
| E-Mail |
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| 원문파일 |
초록 보기 |
