| Summary: | 碩士 === 國立勤益科技大學 === 化工與材料工程系 === 101 === Capacitive deionization (CDI) is a technology for removal of salts from water by electrosorption of ions onto oppositely charged electrodes. The electrodes are usually made from carbon according to its high surface area.In this study, Carbon aerogel were Synthesized by microwave-assisted using resorcinol and formaldehyde catalyzed by KOH followed by carbonization, during which the KOH serves as an activating agent and generates pores mainly located in the micropore range.The electrode was fabricated by polymer binder, which probe into the effect of electrochemical performance, and found that 10 wt% polyvinylidene fluoride content by cyclic voltammery and galvanostatic charge-discharge test have largest capacitance were 166.26 and 166.39 F/g.
For activation by KOH, with an increase of mass ratio of KOH to resorcinol from 3 to 6, both the specific surface area and the pore volume of the carbons increased, from 1543.8 to 2555.9 m2/g and 0.7212 to 2.5024 cm3/g, respectively.The optimum mass ratio of KOH to resorcinol was 5, because too high content of KOH lead to inactive.The specific surface area of 2435.0 m2/g and the highest specific capacitance of up to 237.42 F/g and 224.1 F/g by cyclic voltammery and galvanostatic charge-discharge test were obtained with the mass ratio of KOH to resorcinol of 5, for the same sample, the saturation monolayer adsorption capacity of Langmuir isotherms was 6.3249 mg/g.
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