POS6-1107
Development of a sustainable PPS membrane with tailored porosity using crumpled graphene oxide containing highly interconnected pore architecture
When and Where
Nov 30, -0001
12:00am - 12:00am
Presenter(s)
Shin Min-gyeong (Korea Institute of Science and Technology)
Co-Author(s)
Abstract
Polyphenylene sulfide (PPS) is a high-performance engineering polymer with excellent thermal stability, chemical resistance, electrical insulation, and inherent flame retardancy, making it a promising material for separator of advanced lithium metal batteries (LMBs) with safety-secured long-term performances. However, the mechanically robust and chemically inert natures of PPS impose an extremely challenging matter in the pore formation, often requiring high-temperature processing and harsh chemical treatments involving environmentally harmful chemicals.
Herein, we propose a sustainable, etching-free strategy for fabricating PPS membranes with tailored porosity by incorporating 3D crumpled graphene oxide (CGO) with highly interconnected pore architecture. The internal voids and wrinkled morphology of CGO generate electrolyte-accessible interconnected pathways within the PPS matrix without any efforts for the pore generation. By optimizing the CGO content, the PPS/CGO membrane achieved a notable change to the electrolyte wettability and improved Li-ion transport while retaining the intrinsic thermal stability and flame retardancy of PPS. As a result, the optimized separator enabled stable Li plating/stripping over 1,000 h in Li∥Li symmetric cells. These results demonstrate that CGO-assisted pore engineering offers a promising route for fabricating high-performance PPS-based separators and consequently enabling LMBs of advanced sustainability.
Herein, we propose a sustainable, etching-free strategy for fabricating PPS membranes with tailored porosity by incorporating 3D crumpled graphene oxide (CGO) with highly interconnected pore architecture. The internal voids and wrinkled morphology of CGO generate electrolyte-accessible interconnected pathways within the PPS matrix without any efforts for the pore generation. By optimizing the CGO content, the PPS/CGO membrane achieved a notable change to the electrolyte wettability and improved Li-ion transport while retaining the intrinsic thermal stability and flame retardancy of PPS. As a result, the optimized separator enabled stable Li plating/stripping over 1,000 h in Li∥Li symmetric cells. These results demonstrate that CGO-assisted pore engineering offers a promising route for fabricating high-performance PPS-based separators and consequently enabling LMBs of advanced sustainability.
