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奈米皺褶形貌之還原氧化石墨烯 = Nanowrinkled RGO : ...

國立高雄大學化學工程及材料工程學系碩士班

奈米皺褶形貌之還原氧化石墨烯 = Nanowrinkled RGO : 其製備與超級電容之應用; preparation and application in supercapacitor

紀錄類型:	書目-語言資料,印刷品 : 單行本
並列題名:	Nanowrinkled RGO
副題名:	其製備與超級電容之應用
作者:	陳榕維,
其他團體作者:	國立高雄大學
出版地:	[高雄市]
出版者:	撰者;
出版年:	民103[2014]
面頁冊數:	92葉圖，表格 : 30公分;
標題:	氧化石墨烯
標題:	graphene oxide
電子資源:	http://hdl.handle.net/11296/ndltd/81468745369359068504
附註:	106年10月31日公開
附註:	參考書目：葉87-92
摘要註:	本研究是利用改良的Hummers 法製備氧化石墨烯溶液，並利用抽氣過濾法與轉印的方式，於石墨紙和石墨片基板上做成連續性之氧化石墨烯薄膜電極，再藉由真空低溫(200-400℃)退火來還原氧化石墨烯，最後再利用循環伏安法於0.5 M 硫酸鈉電解液中量測，並計算其比電容值。由試片傾斜10 度之橫截面影像圖來看，基板上之還原氧化石墨烯(RGO)薄膜具有連續性且表面有許多奈米皺摺；而藉著X 射線繞射光譜可知，因為氧化石墨烯之含氧官能基團的脫附，使其面間距縮短，可知氧化石墨烯在退火處理後，如預期的還原；在傅立葉紅外光光譜儀分析可知，雖然RGO 含氧官能基於退火溫度300℃時已被大量脫附，但還是有殘留較難脫附之含氧官能基(C=O)存在；而在Raman 分析中，氧化石墨烯經過300℃退火時，其石墨化程度最好、缺陷程度最小。最後由循環伏法量測之CV 曲線圖計算可知，經過300℃退火還原後之RGO 於掃描速度10 mV/s 和0.5 M 硫酸鈉電解液中能達最高之比電容值618.33 F/g，並由循環壽命測試其穩定性也相當高。本研究相較於其他文獻之還原氧化石墨烯超級電容器擁有更高之比電容值，這對於超級電容器的應用極具潛力。 In this study, we employee modified Hummers method to prepare Graphene oxide(GO) solution, and fabricate continuous graphene oxide films on graphite papers(GPs) and graphite sheets(/GSs) substrate as electrodes for supercapacitors by suction filtration and transfer methods. Subsequently, the GO/GP and GO/GS electrodes are annealed at 200-400℃ in vacuum for one hour to transform to reduced graphene oxide(RGO). Finally, we use cyclic voltammetry(CV) at 0.5 M Sodium sulfate electrolyte to measure the CV curves, and calculate the specific capacitances. From the tilted SEM images, the GO and RGO films, show continuous film-like morphology with a lot of nanowrinkles on the surface; X-ray diffraction patterns, show the d-spacing of GO decrease after annealing due to the desorption of oxygen-containing functional groups; According to Fourier transform infrared spectra, there are still some caroxyl groups (C = O) remained after annealing at 300℃; Raman spectra show the RGO films annealed at 300℃possesses maximum ratio of G to D band, indicating of higher crystalline quality. Besides, electrical measurements show the conductivity of RGO increases with annealing temperature. Finally, we use measured CV curves to calculate specific capacitances of the RGO/GP and RGO/GS electrodes. The RGO/GP sample annealed at 300 ℃ show a highest value 618 F / g at a scan rate of 10 mV/s and the cycle life test s demonstrates good stability. In the work, we demonstrate the fabrication of nanowrinkled RGO/GP electrodes with excellent specific capacitances and stability, which are promising for supercapacitor application.

奈米皺褶形貌之還原氧化石墨烯 = Nanowrinkled RGO : 其製備與超級電容之應用; preparation and application in supercapacitor
陳, 榕維

奈米皺褶形貌之還原氧化石墨烯 = Nanowrinkled RGO : 其製備與超級電容之應用 / 陳榕維撰 - [高雄市] : 撰者, 民103[2014]. - 92葉 ; 圖，表格 ; 30公分.
106年10月31日公開參考書目：葉87-92.
氧化石墨烯graphene oxide

奈米皺褶形貌之還原氧化石墨烯 = Nanowrinkled RGO : 其製備與超級電容之應用; preparation and application in supercapacitor
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