環氧樹脂鋰電解質薄膜之製備及分析

Preparation and Analysis of the Epoxy Lithium Electrolyte Membranes

陳宜苹(Yi-Ping Chen)

指導教授 ： 鄭國忠

國立臺北科技大學/工程學院/化學工程研究所/碩士(2013年)

摘要

本研究利用化學誘發相分離法製備具有孔洞互穿結構的環氧樹脂薄膜，實驗中以雙酚A型的環氧樹脂(D.E.R.331)溶入二異丁酮(diisobutyl ketone, DIBK)中，利用2,4,6-三(二甲胺基甲基)苯酚(2,4,6-tris-(dimethylaminomethyl)phenol, DMP-30)作為硬化劑，於硬化反應的過程中，誘發高分子與溶劑溶解度下降而引發相分離，再將溶劑去除以製備出多孔性高分子薄膜，即為化學誘發相分離法(CIPS)。由機械性質分析中得知，多孔性環氧樹脂鋰電解質隔離膜之壓縮彈性模數為0.1至0.7GPa。再將形成網狀結構的環氧樹脂高分子薄膜進行膨潤度測試，將其浸泡不同濃度之過氯酸鋰電解液，膨潤度約介在2至59 %之間，取決於環氧樹脂薄膜的交聯型態。以1M過氯酸鋰之Ethylene carbonate (EC)/ Propylene carbonate (PC)/ Diethyl carbonate (DEC)製備出環氧樹脂鋰電解質薄膜之鋰離子導電度可達1.5 x10-2 S/cm (20℃)，且可達5.3x10-2 S/cm (70℃)。

關鍵字

化學誘發相分離 ； 環氧樹脂薄膜 ； 表面型態 ； 鋰離子導電度 ； 鋰電解質隔離膜 ； 機械性質

並列摘要

Porous epoxy networks were prepared from epoxy resin, D.E.R. 331, cured with tertiary amine: 2,4,6-tris-(dimethylaminomethyl) phenol (DMP-30), in the diisobutyl ketone (DIBK). After removing the solvent, epoxy thermosets with interconnected channels can be formed via chemical induced phase separation, CIPS. It was found that the compression modulus of the epoxy membranes was about 0.7~2.0 GPa. The epoxy networks were further impregnated with different lithium ionic electrolyte liquids. The swelling ratio of epoxy resin membranes was from 2% to 59%, which was majorly dependent on the morphology of the epoxy networks. The lithium ionic conductivity of the epoxy electrolyte membranes prepared in the mixture of lithium perchlorate with ethylene carbonate (EC), propylene carbonate (PC) and diethyl carbonate (DEC) could reach 1.5 x10-2 S/cm at 20℃, and 5.3x10-2 S/cm at 70℃.

並列關鍵字

chemically induced phase separation ； epoxy membrane ； surface morphology ； ionic conductivity ； lithium electrolytes separator membrane ； mechanical property

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