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題名 | Novel Waterborne Polyurethane Based Electrolyter for Lithium Batteries(Ⅳ)--The Influence of DMPA/PEG Ratios on Conductivity=鋰電池之新穎水性聚执酯電解質(4)--DMPA/PEG比例對導電度的影響 |
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作者 | 鄭宗田; 溫添進; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
卷期 | 29:5 1998.09[民87.09] |
頁次 | 頁327-335 |
分類號 | 468.1 |
關鍵詞 | 鋰電池; 水性聚执酯; 電解質; 導電度; Lithium-ion polymer battery; Polymer electrolyte; Gel electrolyte; Waterborne polyurethane; Single-ion conductor; |
語文 | 英文(English) |
中文摘要 | 本研究以改良型丙酮法製備三種水性聚脲酯(WPU)薄膜,其中DMPA/PEG莫爾比分別控制在0.1, 1,和3。所得乾膜及浸潤50%PC溶劑或LiCF3S03/PC電解液所成的膠態膜用以研究DMPA/PEG比例對離子導電度與導電行為的影響。離子導電度量測係以交流阻抗分析法進行,乾膜及膠態膜量測時分別以不鏽鋼及鋰金屬當電極。微差熱分析(DSC)及偏光顯微鏡(PM)等材料分析結果用以解釋不同薄膜間導電度差異的原因。膠態WPU膜與WPU電解質薄膜的室溫導電度分別達~10⁻⁵ S/cm及~10⁻⁴S/cm。 |
英文摘要 | Three waterborne polyurethane (WPU) films with the molar ratios of dimethylol propionic acid (DMPA) to polyethylene glycol (PEG) at 0.1, 1, and 3 were prepared by using our modified acetone process. The effects of DMPA/PEG on conductive behavior were investigated by comparing the ionic comductivity of these dry films, their gel-type films, and gel-type electrolytes. The gel-type films and gel-type electrolytes were prepared by impregnating the dry films with 50 wt% propylene carbonate (PC) and 1M LiClO₄/PC₃, respectively. The ionic conductivity was determined by running alternating current (AC) impedance with stainless steel (SS)/dry films/SS and Li/gel film/Li cells. Differential scanning calorimetry (DSC) and polarizing microscopy (PM) were employed for material characterization to explain the reason for different conductivities. The room temperature conductivities of gel-type films and gel-type electrolytes are ~10⁻⁵S/cm and ~10S⁻⁴/cm, respectively. |
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