2018-08-012024-05-13https://scholars.lib.ntu.edu.tw/handle/123456789/653675摘要：對於超級電容器應用，過渡金屬偽電容氧化物提供高比表面電容和密度的優點，這有利於實現高器件能量密度。然而，它們通常表現出不足的電流速率性能，這部分是由於它們的電子電導率差，部分是由於參與離子在電解質中擴散的限制。實際上，在電極內建立電子和離子傳導網絡對於提供高電流速率能力是必不可少的。高電流速率能力也對循環穩定性具有深遠影響。在這項工作中，我們從增強液體電解質中的離子傳輸和在電極內構建有效的電子傳導網絡的角度來看錳氧化物超級電容器的速率性能。對於後者，具有不同初級顆粒和附聚物尺寸的氧化錳奈米微晶將通過新型溶液氧化方法合成。氧化物粉末將與具有不同形態和尺寸的碳添加劑匹配，以構建具有各種電網絡配置的電極。解決了氧化物電極的速率性能與氧化物和碳添加劑的粉末性質之間的相關性。結果對於增強基於氧化物的贗電容器的架構設計是重要的。<br> Abstract: For supercapacitor applications, transition metal pseudocapacitive oxides provide the advantages of high specific areal capacitance and densities, which are beneficial to achieving high device energy density. Nevertheless, they have typically demonstrated insufficient current rate performance, which is partly due to their poor electronic conductivities and partly to the limitation of diffusion of participating ions in the electrolyte. Indeed, the establishment of both electronic and ionic conductive networks within the electrode is essential to giving high current rate capability. The high current rate capability also has a profound effect on the cycling stability. In this work, we look at the rate performance of Mn oxides supercapacitors from the viewpoints of enhancing ionic transport in the liquid electrolyte and building an efficient electronic conductive network within the electrodes. For the latter, Mn3O4 nanocrystallites having different primary particle and agglomerate sizes will be synthesized by a novel controlled solution oxidation process. The oxide powders will be matched with carbon additives of different morphologies and dimensionalities for constructing electrodes having various electric networking configurations. The correlation between the rate performance of the oxide electrodes and the powder properties of both the oxide and carbon additives is addressed. The results are important to the architecture design for enhancing the oxide-based pseudocapacitors.超高電容器氧化錳功率導電添加劑電極設計supercapacitorMn oxidesrate performancecarbon additiveelectrode design