添加奈米級三氧化二鋁於PAN系膠態高分子電解質特性之研究

The Effects on Addition of Nanoscale Aluminum Oxide in Polyacrylonitrile Based Gel Polymer Electrolytes

彭學信(Hsueh-Hsin Peng)

指導教授 ： 葉瑞銘

中原大學/理學院/化學研究所/碩士(2003年)

https://doi.org/10.6840/cycu200300588

摘要

在本研究中製備一系列以有機高分子polyacrylonitrile（PAN）為主體，添加不同粒徑及比例之無機α-Al2O3奈米微粒的有機無機奈米複合膠態高分子電解質，並探討α-Al2O3的添加對於PAN系高分子電解質的影響。研究中利用交流阻抗測定儀測量膠態高分子電解質之導電度，同時利用Powder X-ray（XRD）、掃瞄式電子顯微鏡（SEM）、動態機械分析儀（DMA）、循環伏安儀（CV）以及電池充放電循環儀等儀器，探討所製備之奈米複合膠態高分子電解質之各種性質，並比較α-Al2O3添加前後的差異。
實驗結果顯示由導電度的測定，可得知所製備的複合膠態高分子電解質，在添加7 wt% α-Al2O3（particle size = 50 nm）及F=0.6之LiClO4濃度的組成下，於30℃時所測之導電度最佳，且添加α-Al2O3的粒徑越小越好，50 nm＞80 nm＞100 nm。由SEM-EDX測定結果發現，α-Al2O3在電解質中已分散均勻。由DMA測定結果顯示，α-Al2O3的添加會導致軟化點下降。此外，經由電池充放電循環測定結果發現，在此系統中添加α-Al2O3的確有助於提升鋰電池的充放電能力。

關鍵字

鋰二次電池 ； 三氧化二鋁 ； 聚丙烯睛 ； 膠態高分子電解質

並列摘要

Polyacrylonitrile (PAN) was adding into various particle size and proportion of α-aluminum oxide to achieve a series of gel-type polymer electrolytes. The significances of the addition of inorganic nanoparticles into the polyacrylonitrile based gel polymer electrolyte was also studied. AC impedance was employed to exam the conductivity of composed gel polymer electrolyte, moreover, powder X-Ray, SEM, DMA, CV and battery testing system were all used to comparison the physical or chemical properties between neat polymer-based or composite-based electrolytes.
The best result of conductivity of composite-based electrolyte was presented at particle size of 50 nm with 7wt% addition of α-Aluminum oxide in concentration of LiClO4, F=0.6 at 30℃. It is also realized the α-aluminum oxide were disperse evenly in the electrolyte shown by the SEM-EDX tests, and the addition of which was found to lower the softening point, shown by the DMA tests. Furthermore, it is confirmed by the battery test system that addition of α-aluminum oxide indeed enhance the ability of charge/discharge for the lithium coin cell.

並列關鍵字

Lithium Secondary Batteries ； Al2O3 ； gel polymer electrolyte ； polyacrylonitrile

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