發(fā)布時(shí)間：2018-03-05 22:13

  本文選題：氧化鉬　切入點(diǎn)：聚苯胺　出處：《南京理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：超級(jí)電容器是一種介于電池與普通電容之間同時(shí)又兼?zhèn)涠咛攸c(diǎn)的新型儲(chǔ)能器件。與傳統(tǒng)電容器相比,超級(jí)電容器具有功率密度和能量密度高、壽命長、環(huán)境友好等優(yōu)點(diǎn),是一種將能量存儲(chǔ)與環(huán)境保護(hù)相協(xié)調(diào)的“綠色技術(shù)”。M003是一種氧化還原反應(yīng)進(jìn)程豐富的金屬氧化物電極材料,其比電容高、化學(xué)穩(wěn)定性良好,是一種發(fā)展?jié)摿α己玫某?jí)電容器材料。然而M003電極材料仍存在一些不足,如工作電壓低、電子導(dǎo)電率較低等,基于上述內(nèi)容,我們開展了以下工作：以四水合鉬酸銨作為前驅(qū)體,采用傳統(tǒng)水熱法制備α-MoO3納米帶,研究了反應(yīng)溫度(120～200℃C)與反應(yīng)時(shí)間(5-30h)對(duì)納米帶結(jié)構(gòu)、形貌、結(jié)晶度以及電化學(xué)性能的影響。結(jié)果表明隨著反應(yīng)溫度升高和反應(yīng)時(shí)間增加,α-MoO3納米帶形貌逐漸趨于均一,結(jié)晶度不斷增加。不同制備條件下得到的α-MoO3納米帶電化學(xué)性能測(cè)試表明在酸性電解液中,掃描速率為10 mV/s時(shí),M003納米帶比電容能達(dá)到932F/g；MoO3納米帶在酸性和堿性電解液中電容呈贗電容特性,在中性電解液中電容呈雙電層電容特性,其在酸或堿性電解液中的比電容遠(yuǎn)高于在中性電解液中的比電容。循環(huán)穩(wěn)定性測(cè)試表明循環(huán)1000圈后,M003電極比電容的保持率為73.5%。在上述M003納米帶的研究基礎(chǔ)上,通過原位聚合在α-MoO3納米帶的表面形成一層聚苯胺包裹層,制備了MoO3/PANI復(fù)合納米材料。采用SEM、TEM、XRD、FTIR、 Raman、TG對(duì)不同工藝參數(shù)下制得的MoO3/PANI復(fù)合納米材料進(jìn)行了表征,探究了不同工藝參數(shù)對(duì)MoO3/PANI復(fù)合納米材料的形貌和結(jié)構(gòu)的影響,發(fā)現(xiàn)隨著苯胺用量的增加,PANI包裹層厚度逐漸增加,表面逐漸粗糙,而反應(yīng)時(shí)間和pH值則對(duì)MoO3/PANI復(fù)合納米材料的形貌未產(chǎn)生明顯變化。此外,研究了不同反應(yīng)條件下的MoO3/PANI的電化學(xué)性能。結(jié)果表明,由于聚苯胺的包覆,增強(qiáng)電子在材料表面電導(dǎo)率,使其電化學(xué)性能有明顯提高,MoO3/PANI復(fù)合納米材料在掃描速率為l0mV/s時(shí),其比電容可高達(dá)1268F/g。探索合成MoO3納米晶材料,通過乙酰丙酮鉬在無水甲醇中反應(yīng)制備了氧化鉬納米晶,采用TEM、XRD、Raman、及XPS對(duì)產(chǎn)物進(jìn)行結(jié)構(gòu)和形貌的表征。結(jié)果表明,乙酰丙酮鉬在無水甲醇中受熱反應(yīng)可成功制得缺氧態(tài)的氧化鉬納米晶,粒徑約為10nm。隨著反應(yīng)物濃度和反應(yīng)時(shí)間的增加,納米晶結(jié)晶性提高,顆粒尺寸變大,顆粒大小逐漸均一。
[Abstract]:Supercapacitor is a new type of energy storage device which is between battery and ordinary capacitor and has the characteristics of both. Compared with traditional capacitors, supercapacitors have the advantages of high power density and energy density, long life, friendly environment, and so on. M003 is a kind of "green technology" which harmonizes energy storage with environmental protection. M003 is a kind of metal oxide electrode material with rich redox process, which has high specific capacitance and good chemical stability. However, M003 electrode material still has some shortcomings, such as low operating voltage, low electronic conductivity, etc., based on the above, We have carried out the following work: using ammonium molybdate tetrahydrate as precursor, 偽 -MoO3 nanobelts were prepared by traditional hydrothermal method. The structure and morphology of 偽 -MoO3 nanobelts were studied at reaction temperature of 120 ~ 200 鈩，

本文編號(hào)：1572115