臺灣博碩士論文加值系統

本研究混合聚氧化乙烯，水性聚尿酯及鋰鹽溶液（LiClO4/PC)並改變三者
間的比例以製成不同的複合式高分子電解質．藉由交流阻抗分析（ＡＣ）
，可求取電解質的導電度及界面 阻抗．而微分掃描熱卡計(ＤＳＣ)及偏
光顯微鏡（ＰＭ）及掃描式電子顯微鏡（ＳＥＭ ）則用作為材料的檢定
及分析．複合式高分子電解質在LiClO4/PC 含量大於30%後，其導電度對
溫度的關係符合Arrhenius law，而LiClO4/PC含量小於8%者，其結果受
到25 oC到65 oC間的過渡區影響而產生不連續的線段．根據ＡＣ及ＤＳＣ
的結果，增加LiClO4/PC的含量使得高分子電解質的導電度提昇，而熔點
則降低．而ＰＭ的結果顯示增加ＰＥＯ的含量同時增加高分子電解質的結
晶度．當LiClO4/PC加入後，ＰＥＯ含量的增加同樣使得導電度提昇．含
有33% PEO，17% WPU，及50% LiClO4/PC的高分子電解質其導電度相當高
?在85 oC及15 oC分別為~10e-2S/cm及5*10e-3 S/cm．

Various composite electolytes(CE) were prepared by mixing
polytetramethyleneglycol based waterborne polyurethane(WPU(
PTMG)), polyethylene oxide(PEO), andLiClO4/propylene carbonate(
PC). The conductivity of these CEs were investigated by using
alternating current(AC) impednace. Differential scanning
calorimetry(DSC) and polarizing microscopy(PM) were employed for
material characterization. The temperature dependence of the
conductivity follows the Arrhenius law for samples with a
LiClO4/PC content larger than 30%, while for samples with
LiClO4/PC content approximating 8%, it shows linear segments
separated by a transitionzone between 25 oC and 65 oC. According
to the AC and DSC restults, the conductivityis increased and the
melting temperature (Tm) is decreased by increasing the LiClO4/
PC content. PM restuts indicate that the increase in PEO ratio
increases the crystallinity of the PEO-WPU(PTMG) films. When
LiClO4/PC is added, the increase in PEO ratio results in an
increase in conductivity. The CE comprising 33% PEO, 17% WPU(
PTMG), and 50% LiClO4/PC exhibits conductivities as high as ~10
e-2 S/cm at 85 oC and 5*10e-3 at 15 oC.