運用電泳沉積法製作氧化鎳電極以作為超級電容之應用

Fabrication of NiO Electrode by Electrophoretic Deposition for Super Capacitior Application

施韋丞(Wei-Cheng Shih)

指導教授 ： 施文欽

大同大學/電機資訊學院/光電工程研究所/碩士(2012年)

摘要

本論文主要研究目的為利用簡單的化學共沉積法配製出氫氧化鎳，再以電泳沉積的方式沉積配製出氫氧化鎳電極，並探討不同的煅燒溫度及時間對電極電化學特性的影響。再結合奈米碳片製備氧化鎳/奈米碳片複合電極，藉此提升純氧化鎳電極的電容特性。利用化學共沉積法製備出的氫氧化鎳膠體電泳沉積後經由高溫煅燒後就會轉變成氧化鎳的型態。粉體經XRD的分析，可以得知氫氧化鎳在300℃煅燒後會有明顯的相位轉移產生，其反應為氫氧化鎳轉變成氧化鎳和水。藉由SEM圖中可以發現經由煅燒後所得到的氧化鎳，其表面型態為片狀的板塊結構這異於一般的球型結構。以循環伏安法(CV)所測得的電容特性結果顯示，氫氧化鎳經由300℃的溫度煅燒，其轉變為氧化鎳型態的電容特性為最佳，氧化鎳的氧化/還原特性峰分別在0.45V與0.35V且當掃描速度為200 mVs-1時，其測得電容量可達 6Fg-1左右。
而在另一方面，在以300℃煅燒後所得到氧化鎳/奈米碳片之複合電極由SEM的表面型態分析可以觀察到，在矽晶片的表面上附著塊狀地氧化鎳結構，由此可以證明氧化鎳可以經由電泳沉積的方式有效地結合在一起，發現掃描速率在200 mVs-1時其電容值為26Fg-1。

關鍵字

電泳沉積 ； 氧化鎳 ； 電化學電容器 ； 氫氧化鎳 ； 奈米碳片

並列摘要

The main goal of this research is to use the simple chemical co-deposition method to make up Ni(OH)2, and then formulate the Ni(OH)2 electrode by electro-phoresis method, and finally discuss the effect of calcining temperature and time on the electro-chemical properties.
Besides, we integrate the carbon nanoflakes (CNFs) to produce the Ni(OH)2/CNFs compound electrodes to enhance the capacitance performance of Ni(OH)2 electrodes. After the electro-phoresis process, the NiO could be obtained by high-temperature calcined the Ni(OH)2 gel prepared by chemical co-deposition method. From the XRD analysis, the results show that the phase of Ni(OH)2 could be transformed after the calcining temperature of 300℃. The reaction is Ni(OH)2 changed to NiO and H2O.
From the SEM images, the surface morphology of NiO shows the plate structure, which is different from the general ball structure, after the calcining process. The capacitance performance measured by cycling CV method shows that the optimal performance could be obtained when the calcing temperature from Ni(OH)2 to NiO was about 300℃. The characteristic peaks of oxidation and reduction of NiO were about 0.45 and 0.35V, respectively. The measured capacitance was about 26Fg-1
The experimental esults show that the composite electrodes with the CNFs could apparently improve the electro-chemical performance of the NiO.

並列關鍵字

Nickel Oxide ； Carbon nanoflakes ； Electrophoretic Deposition ； Nickel/Oxide/Hydroxide ； Electrochemical Capacitor

參考文獻

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