https://scholars.lib.ntu.edu.tw/handle/123456789/63931
Title: | 超高電容器氧化物電極電容特性與微結構關係的探討 Relations Between Microstructures and Performance of Oxide Electrodes in Electrochemical Double Layer Capacitors |
Authors: | 吳乃立 | Keywords: | 超高電容器;二氧化錫;Supercapacitor;Stannic oxide | Issue Date: | 2000 | Publisher: | 臺北市:國立臺灣大學化學工程學系暨研究所 | Abstract: | 影響二氧化錫電極之比電容量包含了三大 因素:粉體之表面積、粉體之孔洞分布、 粉體之結晶度。隨著熱處理溫度之升高, 粉體之晶粒大小亦隨之成長,較高結晶度 有助於粉體導電度之提高。其孔徑大小逐 漸變大,較大之孔洞有助於電解質中離子 之傳導。但此過程中,可供離子吸附以產 生電荷分離之比表面積卻隨之減少。此三 因素之間相互影響,並無法同時兼顧,因 此其中必定存在一個最適當之條件。由實 驗結果,我們可得知的是,在最適溫度 500 o C 下進行熱處理,可以取得最大的可供電化學反應表面積。 This research focuses on the preparation of sol-gel derived Sb-doped SnO2 xerogel and aerogel with high surface area. By mixing these powders with binder and then coating on substrate, the performance of the film electrode of a supercapacitor in conjunction with KOH electrolyte have been evaluated. Powders heat-treated at temperatures below 400 o C exhibited strongly distributed-capacity phenomenon due to their small pores. Powders heat-treated at temperatures above 600 o C have low capacity due to their small surface area. The optimum heat-treatment temperature for maximum capacitance is ~ 500 o C |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/9243 | Other Identifiers: | 892214E002016 | Rights: | 國立臺灣大學化學工程學系暨研究所 |
Appears in Collections: | 化學工程學系 |
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892214E002016.pdf | 45.29 kB | Adobe PDF | View/Open |
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