Preparation of Proton Conducting Silica Membranes via Pulsed Laser Deposition and Sol-gel Methods

[[abstract]]本研究以溶膠－凝膠法塗佈於多孔PVDF有機膜上，合成具有介孔結構的二氧化矽有機－無機複合膜，並應用在全釩液流電池的隔離膜。而為了增加溶膠－凝膠溶液和多孔PVDF的親和性，使用脈衝雷射沉積法對多孔PVDF進行表面修飾及改質。修飾過的PVDF膜做為溶膠－凝膠法的基板，可以生成約4微米厚的介孔二氧化矽緻密層，藉由同步形成的磺酸官能基增加質子通透速率。在離子選擇率測試當中，使選擇率超過Nafion膜。[[abstract]]The purpose of this study is to synthesize mesoporous silica organic-inorganic complex membranes for vanadium redox flow batteries via sol-gel method dip-coating on porous PVDF membranes. Pulsed laser deposition (PLD) was utilized for modifying the porous PVDF membranes in order to enhance the bonding between the sol-gel solution and the porous PVDF membranes. A 4 μm thick mesoporous silica coating over the membrane, achieved from dip-coating, resulted in the formation of an organic-inorganic composite membrane which by far improved the proton transport through sulfonic functional groups. The modified mesoporous silica organic-inorganic complex membrane was found to have better selectivity compared to the regular Nafion membranes.[[note]]碩