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Porous Gel Polymer Electrolyte via Simple Phase Inversion Process for Sodium Ion Battery
김진일,박종혁 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
Sodium ion batteries (SIBs) are one of the promising energy storage devices and are at the forefront as an alternative to lithium ion batteries (LIB). Liquid electrolytes composed of organic solvents and sodium salts are widely used with separators in SIB. Glass fiber (GF), a commercial separator for SIB generally used with organic electrolytes, exhibits high ion conductivity and suitable cell performance. However, safety issues from explosions can result from leakage and flammability of liquid electrolytes. Poly (vinylidene fluoride-co-hexa fluoropropylene) (PVdF-HFP) copolymers are often chosen as coating polymers in many substrates such as nonwovens and GFs to solve these problems. In this study, a structured gel-polymer electrolyte (SGPE) with controllable and optimized pore structure by a simple phase inversion method is introduced with its improved electrochemical stability and performance for sodium ion battery.
저차원 탄소나노구조 충진제 기반 폴리머 박막의 기계적 강도 특성 향상 연구
김휘동(Whi Dong Kim),안지영(Ji Young Ahn),김수형(Soo Hyung Kim) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
We describe a new method to form polymer thin films, in which carbon nanofillers(CNs) are homogeneously distributed so that they can effectively strengthen the mechanical property of resulting polymer composite thin films via. wet phase inversion. To do so, mixed CNs with polymer in DMF solvent were dispersed in a water bath, wet polymer/CN composites were rapidly precipitated out, and simultaneously CNs were immobilized in the polymer matrix due to rapid solidification. Both hybrid polymer/CNs composite materials and pure polymer materials were prepared to form thin films by a mounting hot press. As the results of tensile strength and hardness tests for the polymer/CNs composite thin films prepared, it was found that the mechanical property of hybrid polymer/CNs composite film was much more increased than that of pure polymer thin films, suggesting that the contacted surface area of various CNs with polymers play a key role of effective filler in polymer matrix.