本文選題：多孔炭　切入點(diǎn)：酚醛樹(shù)脂　出處：《華東理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：多孔炭材料具有發(fā)達(dá)的孔結(jié)構(gòu)、高比表面積、良好的化學(xué)穩(wěn)定性等優(yōu)點(diǎn),被廣泛用于電化學(xué),氣體吸附等多個(gè)領(lǐng)域。但是,鑒于多孔炭在孔隙率,導(dǎo)電性,力學(xué)性能等諸多方面仍存在較大的提升空間,本文采用酚醛樹(shù)脂,六亞甲基四胺(HTMA),聚乙烯醇(PVA),碳納米管(CNT)為原料,以溶膠凝膠-碳化以及活化法為基礎(chǔ),制備了一系列多孔炭材料,并對(duì)其結(jié)構(gòu)與性能進(jìn)行了探討,主要工作如下:(1)采用HTMA對(duì)酚醛樹(shù)脂(PF)進(jìn)行固化,考察不同HTMA用量對(duì)酚醛樹(shù)脂成型及結(jié)構(gòu)的影響,通過(guò)溶膠凝膠-碳化以及氫氧化鉀活化制備出比表面積達(dá)到2228 m~2/g,孔容1.07 cm~3/g的多孔炭,將所制備的多孔炭用于超級(jí)電容器電極,表現(xiàn)出良好的雙電層電容行為,比容量達(dá)到251 F/g;可歸結(jié)于超高表面積對(duì)電容量的貢獻(xiàn)較大。(2)利用PVA與酚醛(RF)復(fù)合制備多孔炭,考察不同PVA用量對(duì)RF成型及結(jié)構(gòu)的影響,通過(guò)溶膠凝膠-碳化以及氫氧化鉀活化制備出比表面積達(dá)到1600 m~2/g,孔容0.85 cm~3/g的多孔炭,產(chǎn)物表現(xiàn)出良好的雙電層電容行為,比容量達(dá)到234 F/g;常壓下對(duì)純CO_2吸附量高達(dá)到5.33 mmol/g,而且發(fā)現(xiàn)其再生所需能耗較低,循環(huán)性能良好。(3)探索了用CNT與酚醛樹(shù)脂(PF)原位混合并經(jīng)后期碳化制備具有復(fù)合多孔炭,考察不同CNT用量對(duì)PF結(jié)構(gòu)的影響,通過(guò)溶膠凝膠-碳化制備出多孔炭,將所制備的多孔炭用于鈉電電極,其中添加10 wt%的CNT-10首次放電容量達(dá)417.6 mAh/g,但衰減較大,有待于進(jìn)一步提高。
[Abstract]:Porous carbon materials have been widely used in many fields such as electrochemistry, gas adsorption and so on because of their developed pore structure, high specific surface area and good chemical stability. In this paper, phenolic resin, hexamethylenetetramine (HTMAA), polyvinyl alcohol (PVA), carbon nanotube (CNT) were used as raw materials, based on sol-gel carbonization and activation method. A series of porous carbon materials were prepared, and their structure and properties were discussed. The main work was as follows: HTMA was used to cure phenolic resin. The effects of different HTMA content on the molding and structure of phenolic resin were investigated. Porous carbon with a specific surface area of 2228 mg / g and pore volume of 1.07 cm~3/g was prepared by sol-gel carbonization and potassium hydroxide activation. The prepared porous carbon was used as supercapacitor electrode and showed good double-layer capacitance behavior. The specific capacity of porous carbon was 251F / g, which can be attributed to the contribution of ultra-high surface area to capacitance. (2) porous carbon was prepared by using PVA and phenolic resin. The effects of different PVA contents on RF molding and structure were investigated. Porous carbon with specific surface area of 1600mg / g and pore volume of 0.85 cm~3/g was prepared by sol-gel carbonization and potassium hydroxide activation. The specific capacity was 234F / g, the adsorption capacity of pure CO_2 reached 5.33 mmol / g at atmospheric pressure, and it was found that its regeneration energy consumption was lower, and its cycling performance was good. 3) the composite porous carbon was prepared by in-situ mixing of CNT and phenolic resin (PF) and later carbonization. The influence of different CNT content on PF structure was investigated. Porous carbon was prepared by sol-gel carbonization, and the prepared porous carbon was used as sodium electrode. The initial discharge capacity of 10 wt% CNT-10 was 417.6 mAh/ g, but the attenuation was large. Further improvement is needed.
【學(xué)位授予單位】：華東理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TQ127.11;TB383.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 石存蘭;薛文東;劉曉光;李勇;孫加林;;凍干法制備多孔氮化硼陶瓷及其成孔機(jī)理[J];硅酸鹽學(xué)報(bào);2015年12期

2 解強(qiáng),張香蘭,李蘭廷,金雷;活性炭孔結(jié)構(gòu)調(diào)節(jié):理論、方法與實(shí)踐[J];新型炭材料;2005年02期

，

本文編號(hào)：1628356