本文關(guān)鍵詞：全釩液流電池用磺化聚醚醚酮基復(fù)合膜的制備與性能　出處：《天津工業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 磺化聚醚醚酮 磺酸化石墨烯 類石墨相氮化碳 質(zhì)子交換膜 二維材料 全釩液流電池

【摘要】：全釩氧化還原液流電池(VRB)以其循環(huán)壽命長(zhǎng),快速響應(yīng)時(shí)間,深放電能力和低污染排放受到廣泛關(guān)注。質(zhì)子交換膜(PEM)是VRB的關(guān)鍵組分,用于離子傳導(dǎo)和防止正/負(fù)電解質(zhì)的交叉混合。全氟磺酸(PFSA)質(zhì)子膜(Nafion系列)具有高的化學(xué)、機(jī)械穩(wěn)定性和質(zhì)子傳導(dǎo)率,但高成本和高釩離子滲透性導(dǎo)致VRB的庫(kù)倫效率和能量效率降低,因而開發(fā)新型質(zhì)子交換膜對(duì)VRB商業(yè)化有重要意義。以3-氨基苯磺酸為氧化石墨烯(GO)修飾劑,制備了磺酸化氧化石墨烯(SGO),并與磺化聚醚醚酮(SPEEK)共混制備了 SPEEK/SGO復(fù)合質(zhì)子交換膜。結(jié)果表明,SGO的加入提高了復(fù)合膜的質(zhì)子傳導(dǎo)率。當(dāng)添加含量3 wt%時(shí),SPEEK/SGO-3的質(zhì)子傳導(dǎo)率為17.6 mS cm-1。單電池測(cè)試表明,在30 mA cm-2電流密度下,SPEEK/SGO-3復(fù)合膜的庫(kù)倫效率(CE:95.6%vs90.2%),能量效率(EE:81%vs 73.8%)高于商業(yè)化的Nafion 117膜。300次充放電循環(huán)表明SPEEK/SGO-3復(fù)合膜具有良好的耐氧化刻蝕和機(jī)械穩(wěn)定性。采用多氨基、多納米孔的類石墨相氮化碳(g-C3N4)二維材料為摻雜劑,制備了 g-C3N4含量不同的SPEEK/g-C3N4復(fù)合質(zhì)子交換膜。結(jié)果表明,磺酸根(-S03H)與亞氨基(-NH)、氨基(-NH2)之間的相互作用,降低了釩離子的滲透率。當(dāng)添加含量為1.5 wt%時(shí),SPEEK/g-C3N4-1.5復(fù)合膜的釩離子透過率為 3.73×107 cm2 min-1。在30 30mA cm-2 的電流密度下,SPEEK/g-C3N4-1.5 復(fù)合膜的單電池效率為(CE:97%,EE:83.6%),優(yōu)于商業(yè)化Nafion 117(CE:90.2%,EE:73.8%),并且復(fù)合膜的能量效率提高10%。300次充放電循環(huán)測(cè)試表明,SPEEK/g-C3N4質(zhì)子交換膜展現(xiàn)了在強(qiáng)酸性、強(qiáng)氧化性環(huán)境中的結(jié)構(gòu)穩(wěn)定性和電池效率。
[Abstract]:Due to its long cycle life, rapid response time, deep discharge capacity and low pollution discharge, all vanadium redox liquid flow battery (VRBs) have attracted wide attention. Proton exchange membrane (PEM) is the key component of VRB. For ion conduction and prevention of cross mixing of positive / negative electrolytes. PFSA (perfluorosulfonic acid) proton membrane Nafion series) has high chemical, mechanical stability and proton conductivity. However, the high cost and high vanadium ion permeability lead to the decrease of Coulomb efficiency and energy efficiency of VRB. Therefore, the development of new proton exchange membranes is of great significance to the commercialization of VRB. Using 3-aminobenzenesulfonic acid as the modifier of graphene oxide, the sulfonated graphene oxide (SGOO) was prepared. The SPEEK/SGO composite proton exchange membrane was prepared by blending with sulfonated polyether ether ketone (SPEEK). With the addition of SGO, the proton conductivity of SPEEK / SGO-3 was 17.6 mScm-1.The single cell test showed that the proton conductivity of SPEEK / SGO-3 was 17.6 mScm-1. At the current density of 30 Ma cm-2, the Coulomb efficiency of Speek / SGO-3 composite membrane is 95.6 vs 90.2. Energy efficiency: EE: 81 vs 73.8). Higher than commercial Nafion 117 film. 300 cycles show that SPEEK/SGO-3 composite film has good oxidation resistance and mechanical stability. SPEEK/g-C3N4 composite proton exchange membranes with different content of g-C _ 3N _ 4 were prepared by using multi-nano-pore graphite-like carbon nitride (GN _ 3N _ 4) as dopant. The results show that g-C _ 3N _ 4 composite proton exchange membranes with different contents have been prepared. The interaction between sulfonic acid group (S03H) and iminodium (NHN), amino-aniline (NH2), reduced the permeability of vanadium ion, when the addition content was 1.5 wt%. The vanadium ion transmittance of SPEEK/g-C3N4-1.5 composite membrane is 3.73 脳 10 ~ 7 cm2 min ~ (-1) under the current density of 30 30 Ma cm-2. The efficiency of single cell of SPEEK/g-C3N4-1.5 composite membrane is as follows: CE97 / EEW 83.6, which is superior to commercial Nafion 117C / CE90.2%. The energy efficiency of the composite membrane was increased by 10. 300 charge-discharge cycles. The results showed that the SPEEK / g-C3N4 proton exchange membrane exhibited strong acidity. Structural stability and cell efficiency in strongly oxidized environments.
【學(xué)位授予單位】：天津工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM912;TB383.2

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本文編號(hào)：1415264