本研究成功以溶膠-凝膠法合成具甲基丙烯醯氧基的二氧化矽交聯劑，並將其導入以聚醚高分子為主體的SDMA，製成複合性高分子電解質，由掃描式電子顯微鏡、線性掃描伏安法測試，可得知二氧化矽修飾物能有效提升熱穩定性、電化學穩定性達4.5V以上。添加二氧化矽修飾物能有助於鋰離子的傳遞，其離子傳導度在30℃可達5.40x10-3 S cm-1。添加越多無機物，極化現象會變小，二氧化矽修飾物在2C放電下的電容值有68mAhg-1。而在循環壽命測試中，導入二氧化矽修飾物能夠更降低電池內阻抗與穩定鋰金屬鈍化層，使0.5C/0.5C長效半電池與100次循環充放電的測試後，可達到88mAhg-1。二氧化矽修飾後交聯結構存在下的鋰離子均勻的堆積，形成穩定的SEI層，使SEI層不受電解液的侵蝕，使得二氧化矽修飾物在0.5C在50圈充放電後其界面阻抗變化減少。

In this study, we synthesize functional silica via sol-gel method has been accomplished and with TEM. From LSV, the gel polymer electrolytes have good electrochemical window about 4.5V. For battery applications, the gel polymer electrolytes show good half-cell specific capacity with the addition of functional silica. The addition of functional silica can reduce internal resistance. In cycle life test, it can reach 68mAhg-1 capacity in 0.5C/0.5C charge-discharge rate after 100 cycles test. SG50 exhibited a remarkable improved cycling performance after 100 cycles.

The result shows that the gel polymer electrolytes enhance stability and performance in lithium-ion battery. We observed the surface of the Li anode obtained from the cells after 100 cycles. In contrast, SG50 features a compact and smooth SEI layer but the liquid electrolyte forms an inhomogeneous layer with crack.

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