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Author

Kim, Byeong-Su
Soft and Hybrid Nanomaterials Lab
Research Interests
  • Carbon materials, polymer, Layer-by-Layer (LbL) assembly, hyperbranched polymer, polyglycerol (PG), bio-applications

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Functionalized Nanocellulose-Integrated Heterolayered Nanomats toward Smart Battery Separators

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Title
Functionalized Nanocellulose-Integrated Heterolayered Nanomats toward Smart Battery Separators
Author
Kim, Jung-HwanGu, MinsuLee, Do HyunKim, Jeong-HoonOh, Yeon-SuMin, Sa HoonKim, Byeong-SuLee, Sang-Young
Keywords
functionalized nanocellulose; heterolayered nanomat; metal-ion chelation; molecular simulation; Separator membranes
Issue Date
201609
Publisher
AMER CHEMICAL SOC
Citation
NANO LETTERS, v.16, no.9, pp.5533 - 5541
Abstract
Alternative materials obtained from natural resources have recently garnered considerable attention as an innovative solution to bring unprecedented advances in various energy storage systems. Here, we present a new class of heterolayered nanomat-based hierarchical/asymmetric porous membrane with synergistically coupled chemical activity as a nanocellulose-mediated green material strategy to develop smart battery separator membranes far beyond their current state-of-the-art counterparts. This membrane consists of a terpyridine (TPY)-functionalized cellulose nanofibril (CNF) nanoporous thin mat as the top layer and an electrospun polyvinylpyrrolidone (PVP)/polyacrylonitrile (PAN) macroporous thick mat as the support layer. The hierarchical/asymmetric porous structure of the heterolayered nanomat is rationally designed with consideration of the trade-off between leakage current and ion transport rate. The TPY (to chelate Mn2+ ions) and PVP (to capture hydrofluoric acid)-mediated chemical functionalities bring a synergistic coupling in suppressing Mn2+-induced adverse effects, eventually enabling a substantial improvement in the high-temperature cycling performance of cells.
URI
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DOI
http://dx.doi.org/10.1021/acs.nanolett.6b02069
ISSN
1530-6984
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