本文選題：超級電容器 + 復(fù)合電極�。� 參考：《中國礦業(yè)大學(xué)》2017年碩士論文

【摘要】：采用萃取反萃取法分離煤全組分得到四大族組分,即重質(zhì)組、密中質(zhì)組、疏中質(zhì)組和輕質(zhì)組。將疏中質(zhì)組和密中質(zhì)組膠體按照一定質(zhì)量比混合均勻,加入泡沫鎳浸漬涂抹,震蕩使其黏連于泡沫鎳上,經(jīng)反萃、烘干、炭化得炭/泡沫鎳復(fù)合體,再放入一定濃度的活化劑溶液中浸泡,干燥后在一定溫度下活化得到多孔碳/泡沫鎳復(fù)合電極,用6mol/L的KOH做電解質(zhì)溶液,檢測電化學(xué)性能。結(jié)果表明:重組煤中疏中質(zhì)組與密中質(zhì)組族組分并涂抹于泡沫鎳骨架上,經(jīng)炭化、活化可以得到性能良好的超級電容器多孔炭/泡沫鎳復(fù)合電極,其在25m A/g充放電電流密度下比電容最高達(dá)256.8F/g,復(fù)合電極內(nèi)阻多在5Ω左右,最低達(dá)3.12Ω;較佳的復(fù)合電極制備條件為:疏密比0.04,炭化終溫570℃,炭化中間恒溫溫度450℃和570℃,中間恒溫時間均為60min,KOH活化劑時堿水比為0.6,活化溫度750℃。復(fù)合電極層次孔分布有兩種類型:峰型階梯式和彌散式,其中以峰型階梯式的比電容量較高。峰型階梯式有5種層次孔范圍,分別是0.5nm左右、0.8nm左右、1.2nm左右、1.4-1.7nm之間及2.2-3.0nm之間,V微/V中孔容比及S微/S中比表面積比與比電容C有著三維空間平面關(guān)系;彌散式主要有2種層次孔,分別是0.5nm左右,1.0-2.0nm之間,其復(fù)合電極比電容量較小的原因在于0.5-2.0nm之間的孔徑分布較少。多孔炭/泡沫鎳復(fù)合電極內(nèi)部的層次孔結(jié)構(gòu)是由大孔到微孔順序嵌套,形成大孔嵌套中孔,中孔嵌套微孔的層次孔嵌套模型,這些大孔與復(fù)合電極材料外圍的三維空間直接相連,從而有利于電解質(zhì)離子進(jìn)入微孔表面。
[Abstract]:The extraction and back extraction method was used to separate the whole components of coal into four groups, namely, heavy group, dense medium group, sparse medium group and light weight group. The colloids of the thinning group and the dense group were mixed evenly according to a certain mass ratio, then the foam nickel was impregnated and smeared, and the colloid was bonded to the foam nickel by shock. The carbon / nickel foam complex was obtained by stripping, drying and carbonizing. The porous carbon / foamed nickel composite electrode was obtained by soaking in a certain concentration of activator solution after drying at a certain temperature. KOH of 6mol/L was used as electrolyte solution to test electrochemical performance. The results show that the porous carbon / nickel foam composite electrode of supercapacitor can be obtained by carbonization and carbonization. The maximum specific capacitance is 256.8 F / g at 25 Ma / g current density, and the internal resistance of composite electrode is about 5 惟 and the lowest is 3.12 惟. The optimum preparation conditions of composite electrode are as follows: density ratio 0.04, carbonization final temperature 570 鈩，

本文編號：1963376