(1. 中南大學(xué) 粉末冶金國家重點(diǎn)實(shí)驗(yàn)室，長(zhǎng)沙 410083；
2. 中南大學(xué) 材料科學(xué)與工程學(xué)院， 長(zhǎng)沙 410083)
摘 要: 采用電沉積方法制備了混合電容器鉭基多孔氧化釕陰極涂層材料， 探討了電沉積過程中電沉積液的pH值隨電沉積時(shí)間的變化關(guān)系， 研究了電沉積時(shí)間對(duì)氧化釕沉積質(zhì)量的影響。 用X射線衍射和掃描電鏡分別表征了熱處理前后的涂層結(jié)構(gòu)及涂層的多孔形貌，用循環(huán)伏安法測(cè)量了涂層的電容， 并研究了熱處理溫度對(duì)電容量大小及其穩(wěn)定性的影響。 結(jié)果表明： 電沉積的氧化釕為非晶態(tài)， 涂層為納米多孔結(jié)構(gòu)； 熱處理有利于涂層孔隙結(jié)構(gòu)及大小的均勻性，不同溫度的熱處理使涂層具有不同的電容， 經(jīng)熱處理后涂層的電容穩(wěn)定； 經(jīng)100 ℃熱處理1 h后的多孔氧化釕涂層具有最大的比電容。
關(guān)鍵字: 氧化釕；多孔涂層；陰極材料；混合電容器； 電沉積
of hybrid capacitor
ZHOU Ke-chao1
（1. State Key Laboratory of Powder Metallurgy,
Central South University, Changsha 410083, China;
2. School of Materials Science and Engineering,
Central South University, Changsha 410083, China）
Abstract: Porous ruthenium oxide coatings as cathode material of hybrid capacitor were prepared on tantalum substrate by electrodeposition method. Change relation of bath pH and electrodeposition time and the influence of electrodeposition time on ruthenium oxide coatings mass during electrodeposition were investigated. The structures and morphologies of the coatings were analyzed, respectively, by X-ray diffractrometry and Scanning electron microscopy before and after heat-treatment. The influence of heat-treatment temperature on the content of coating capacitance were studied. The results show that the coatings compose of amorphous ruthenium oxides and the nano-porous structures form in the coatings. The specific capacitance varies with the change of heat treatment temperatures. The uniformity of porous structures can make the capacitance of the coating stable and the content of the coating capacitance reaches the highest after heat-treated at 100 ℃ for 1 h.
Key words: ruthenium oxide; porous coatings; cathode material; hybrid capacitor; electrodeposition
