Polymeric Materials for Li-ion Batteries with Safe and High-Energy-Density
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초록
내용
Rechargeable batteries are typically assembled in a dry room that controls moisture because lithium salts in the electrolytes are highly reactive with moisture, which has a significant effect on the battery performance. In this talk, impurity scavenging separator membrane was fabricated using an impurity scavenging material. This material was synthesized by an urethane reaction between porous silica and (3-isocynatopropyl)triethoxysilane. The resulting functional separator exhibited a stable cycle retention even at high temperature. In addition, I present a a facile but efficient way of incorporating the natural polymers with an ionically conductive crosslinker, which can construct a robust network for silicon anodes. The boronic acid in the crosslinker spontaneously reacts with natural polymers to generate boronic ester at room-temperature, which gives a strong and dynamic covalent bonding to the supramolecular network. The polyethylene oxide in the crosslinker contributes to the enhanced ionic conductivity of polymers, leading to the outstanding rate performances.