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Functionalized Nanocellulose-Integrated Heterolayered Nanomats toward Smart Battery Separators
Version 2 2016-08-02, 13:36
Version 1 2016-07-08, 15:07
journal contribution
posted on 2016-07-06, 00:00 authored by Jung-Hwan Kim, Minsu Gu, Do Hyun Lee, Jeong-Hoon Kim, Yeon-Su Oh, Sa Hoon Min, Byeong-Su Kim, Sang-Young LeeAlternative
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.
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heterolayered nanomatheterolayered nanomat-basedbattery separator membranesion transport ratePVPmaterial strategychemical activityelectrospun polyvinylpyrrolidoneSmart Battery Separatorssupport layerCNFFunctionalized Nanocellulose-Integrated Heterolayered NanomatsTPYMncycling performanceenergy storage systems
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