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題 名 | 固態高分子鋅空氣電池之製備及電性分析=Assembly and Electrochemical Properties Analyses of Solid-State Polymer Zn-air Battery |
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作 者 | 楊純誠; 林聲仁; | 書刊名 | 明志學報 |
卷 期 | 36:2 2005.01[民94.01] |
頁 次 | 頁1-8 |
分類號 | 468.1 |
關鍵詞 | 固態高分子; 鋅空氣電池; 聚乙烯醇電解質; 隔離膜; PVA; |
語 文 | 中文(Chinese) |
中文摘要 | 固態鋅空氣電池是以空氣中的氧氣作為正極活性物質,及以鋅粉做為負極活性物質組合成的電池,本研究以鹼性固態高分子電解質取代傳統的PP/PE不織布隔離膜和KOH電解質。由於氧氣本身不能直接作為電極,它須藉由"多孔性碳電極"吸附氧氣的能力,並提供電化學反應的介面環境與"鋅陽極"組成電池。空氣中的氧氣擴散進入電極中,隨後擴散吸附在"碳電極"上,經由"碳電極"內的KMnO4觸媒與電解液在界面產生電化學反應,即是還原反應。在電解表面當氧氣被消耗完後,可經由空氣中供應氧氣,另負極Zn則氧化成ZnO,故可持續產生電流。本研究應用鹼性固態聚乙烯醇(PVA)電解質於鋅空氣電池,可防止KOH漏液及鋅穿透隔離膜,造成短路問題,大大的提升鋅-空氣電池的放電電容量、利用率及能量密度等。本研究發現製備合成之固態高分子鋅-空氣電池在各種溫度及放電速率(C/5-C/20)下測試,仍具有非常平坦的放電電壓及高的鋅利用率(80%以上)、體積能量及重量能量密度,而且電池的成本也相當的低廉且電池材料也沒有任何環保問題。 |
英文摘要 | This work showed a method to fabricate the alkaline solid-state polymer Zn-air battery. Solid-state polymer Zn-air battery consisted of the zinc gel anode, the air cathode, and the alkaline solid polymer electrolyte. The formulation of anode zinc gel is similar to that of alkaline battery. The Zn gel anode contains a mixture of electrolytic zinc powders, KOH electrolyte, gelling agent and small amount of additives. Air cathode electrode was made by the carbon gas diffusion electrode, in which comprising of two types of layers, namely the gas diffusion and active layers. The active layer on the electrolyte side used a high sureface area carbon for the oxygen reduction reaction and potassium permanganate (KMnO4)used as a catalyst for oxygen reduction. The diffusion layer on the airside had a high PTFE content to prevent KOH electrolyte weeping or climbing. Due to the sufficient amount of fresh air and oxygen supply, the air cathode can run continuously. Theoretically, Zn-air battery is an accumulator if the cell has enough zinc powders and electrolyte. The air cathode plays a role of energy transfer. The experimental result shows that this lab-made solid-state polymer Zn-air battery had high performance at various temperatures and discharge rates (C/5-C/20), having a flat working voltage and the higher Zn utilization ratio (over 80%), also having high energy and power desitied. The cost of solid-state polymer Zn-air battery is very cheep and all materials used in bettery are environmentally friendly. |
本系統中英文摘要資訊取自各篇刊載內容。