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Synthesis And Property Study Of Carbon-nanostructured Aerogels Materials For Supercapacitors Under Alkali Catalyzing

Posted on:2006-08-22Degree:MasterType:Thesis
Country:ChinaCandidate:S Z FangFull Text:PDF
GTID:2132360182956542Subject:Applied Chemistry
Abstract/Summary:PDF Full Text Request
Resorcin- formaldehyde aerogels system has been the main explored object in this paper. The study includes sol-gel process, the synthesis process of organic aerogels and carbon aerogels and the effect of different accretions on aerogels materials.With various techniques of low temperature nitrogen adsorption, cyclic voltammetry, electrochemical impedance spectroscopy (EIS) and scan electron microscope, the structure and properties of the final aerogels materials have been measured and researched.The results of low temperature nitrogen adsorption show that carbon aerogels materials mainly consist of mesopores. By the analysis and simulation of electrochemical impedance spectroscopy, the further information of the carbon aerogels electrode is gained. The above research shows carbon aerogels materials have good electrochemical stability in full applied potential range and can be ideal electrode materials. Due to the introducing of organic compound, such as hexamethylenetetramine , the value of sepcifical surface and specifical capacitance of those materials has been improved distinctly. And the introducing of metal ionic, such as Mn2+,Cu2+, profundingly improved the electrochemical properties of the final carbon areogels materials. Compared with the blank samples, the value of sepcifical surface of those samples increases by 30% and the value of specifical capacitance increases by more than 50% respectively. The results of the specifical capacitances of different aerogels materials indicate those materials have significant applied value.
Keywords/Search Tags:Carbon aerogels, Electrochemical impedance spectroscopy (EIS), Cyclic voltammetry (CV), Electrochemistry, supercapacitor
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