本文選題：過(guò)渡金屬 + 硫族化合物��； 參考：《安徽師范大學(xué)》2017年碩士論文

【摘要】：由于過(guò)渡金屬材料有著獨(dú)特的物理和化學(xué)性能,從而廣泛的應(yīng)用在催化、儲(chǔ)能、電磁、傳感等領(lǐng)域。其中,過(guò)渡金屬Co、Mn、Ni硫族化合物納米材料具有制備方法簡(jiǎn)單,形貌結(jié)構(gòu)易控制合成,電化學(xué)活性高等優(yōu)點(diǎn),引起了研究者們的廣泛關(guān)注。對(duì)于當(dāng)今比較前沿的超級(jí)電容器儲(chǔ)能材料而言,制備的方法簡(jiǎn)單及材料的性能優(yōu)越一直是科研者的一致追求。本論文通過(guò)水熱、離子交換及材料復(fù)合等方法使過(guò)渡金屬Co、Mn、Ni硫族化合物具有獨(dú)特的納米結(jié)構(gòu),從而使其具有突出的導(dǎo)電性、較高的電化學(xué)活性、較大的比表面積,表現(xiàn)出優(yōu)異的電化學(xué)儲(chǔ)能性能。本論文的主要研究?jī)?nèi)容如下:1.通過(guò)低溫水熱法及泡沫鎳作為模板的條件下合成出超薄多孔Co_3O_4的前軀體Co(OH)2,前軀體Co(OH)2再經(jīng)高溫退火處理后即得超薄介孔狀Co_3O_4納米片。通過(guò)TME和BET表征后發(fā)現(xiàn),Co_3O_4納米片由大量介孔組成,孔徑約為2-12 nm,且退火后的比表面積是前軀體的2.24倍,由此可見(jiàn)孔隙的大量生成。將制備的Co_3O_4納米片作為超級(jí)電容器電極材料,在2 M NaOH電解液里當(dāng)電流密度為1 A g-1時(shí)電容大小為610F g-1。在4 A g-1電流密度下循環(huán)3000圈后,比電容仍可保持在94.5%。將其應(yīng)用在非對(duì)稱電極中,表現(xiàn)出優(yōu)異的性能。由以上可得超薄多孔Co_3O_4納米片是一種不錯(cuò)的儲(chǔ)能電極材料。2.在有了超薄多孔Co_3O_4納米片以后,通過(guò)簡(jiǎn)單的水熱條件下的離子交換方法,將O原子替換成S原子。由于負(fù)載Co_3O_4的泡沫鎳參與部分反應(yīng),故產(chǎn)物中包含部分NiS。在2 M KOH電解液中,在同樣的電流密度下,過(guò)渡金屬硫化物Co3S4/NiS的比電容是原先超薄多孔Co_3O_4的12倍。在非對(duì)稱電極測(cè)試中,4 mA cm-2下,過(guò)渡金屬硫化物Co3S4/NiS的比電容為1810 mF cm-2,其電位窗口可達(dá)1.6 V,在功率密度為32 W m-2下,能量密度為6.44 W h m-2。我們將其制作成模擬的儲(chǔ)能器件應(yīng)用時(shí),其可以令5個(gè)LED持續(xù)工作8分鐘以上。3.通過(guò)兩步水熱法合成出過(guò)渡金屬氧化物的復(fù)合物MnO2@NiMo O4,并研究了其作為柔性超級(jí)電容器的儲(chǔ)能性能。以MnO2納米線為模板,然后利用水熱法在MnO2納米線外面生長(zhǎng)出Ni MoO4納米片。結(jié)構(gòu)表征后發(fā)現(xiàn)該過(guò)渡金屬氧化物復(fù)合物是以MnO2納米線為核的異質(zhì)結(jié)構(gòu)。以這種異質(zhì)結(jié)構(gòu)的過(guò)渡金屬氧化物為正極,多孔碳作為負(fù)極,制造柔性不對(duì)稱超級(jí)電容器,在10 mV s-1的掃描速率下?lián)碛?86.8 F g-1的高電容,在超過(guò)20000次循環(huán)后比電容量保留132.7%,在電極組件彎曲30到150o(相應(yīng)的曲率半徑為4.5 mm至小至1.0 mm),彎曲后的比電容沒(méi)有明顯變化。這樣優(yōu)越的性能說(shuō)明MnO2@NiMoO4是一種有潛力的超級(jí)電容器電極材料。
[Abstract]:Due to the unique physical and chemical properties of transition metal materials, it is widely used in the fields of catalysis, energy storage, electromagnetic, sensing and so on. Among them, Co, Mn, Ni sulfur compound nanomaterials have the advantages of simple preparation method, easy to control synthesis of morphology and structure, and high electrochemistry activity, which have aroused the widespread concern of the researchers. As far as the advanced supercapacitor energy storage materials are concerned, the simple preparation method and the superior performance of the materials have always been the consistent pursuit of the researchers. This paper makes the transition metal Co, Mn, Ni sulfur compounds with unique nanostructures by the methods of hydrothermal, ion exchange and material recombination, so that they have outstanding conductivity. High electrochemical activity, larger specific surface area and excellent electrochemical energy storage performance. The main contents of this paper are as follows: 1. the precursor Co (OH) 2 of ultrathin porous Co_3O_4 was synthesized under the condition of low temperature hydrothermal method and nickel foam as a template, and the precursor Co (OH) 2 was then annealed at high temperature, and the ultrathin mesoporous Co_3 was obtained. The O_4 nanoscale was characterized by TME and BET. It was found that the Co_3O_4 nanoscale was composed of a large number of mesoporous pores, with an aperture of about 2-12 nm, and the specific surface area after annealing was 2.24 times that of the precursor. Thus, a large number of pores were produced. The prepared Co_3O_4 nanoscale was used as a supercapacitor electrode material and the current density was 1 A g-1 in the 2 M NaOH electrolyte. The capacitance is 610F g-1. after 3000 cycles at 4 A g-1 current density, and the specific capacitance can still be kept in the asymmetric electrode with the specific capacitance at 94.5%.. The super thin porous Co_3O_4 nanoscale is a good energy storage electrode material.2. after a super thin porous Co_3O_4 nanoscale, through simple water. The ion exchange method under thermal conditions replaced the O atoms into S atoms. Due to the partial reaction of the nickel foam loaded with Co_3O_4, the product contained part of the NiS. in the 2 M KOH electrolyte, and at the same current density, the specific capacitance of the transition metal sulfide Co3S4/NiS was 12 times that of the original ultra thin porous Co_3O_4. In the asymmetric electrode test, 4 Under mA cm-2, the specific capacitance of the transition metal sulfide Co3S4/NiS is 1810 mF cm-2, its potential window can reach 1.6 V, the power density is 32 W m-2, and the energy density is 6.44 W h m-2.. When we make it into a simulated energy storage device, it can make 5 LED for more than 8 minutes more than two step hydrothermal method to synthesize the transition metal oxygen. The compound MnO2@NiMo O4 of the compound is used as the energy storage performance of the flexible supercapacitor. The MnO2 nanowires are used as the template, and the Ni MoO4 nanoscale is grown outside the MnO2 nanowires. The structural characterization shows that the transition metal oxide complex is a heterogeneous structure with the MnO2 nanowire nucleus. The transition metal oxide is the positive pole, and the porous carbon is used as the negative electrode to make the flexible asymmetric supercapacitor, with a high capacitance of 186.8 F g-1 at the scanning rate of 10 mV. After more than 20000 cycles, the specific capacity is 132.7%, and the electrode assembly is bent 30 to 150O (the radius of curvature of the phase is 4.5 mm to 1 mm) and is bent after bending. There is no obvious change in specific capacitance. This superior performance shows that MnO2@NiMoO4 is a potential supercapacitor electrode material.

【學(xué)位授予單位】：安徽師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TB383.1

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 陳新麗;李偉善;;超級(jí)電容器電極材料的研究現(xiàn)狀與發(fā)展[J];廣東化工;2006年07期

2 許開(kāi)卿;吳季懷;范樂(lè)慶;冷晴;鐘欣;蘭章;黃妙良;林建明;;水凝膠聚合物電解質(zhì)超級(jí)電容器研究進(jìn)展[J];材料導(dǎo)報(bào);2011年15期

3 梓文;;超高能超級(jí)電容器[J];兵器材料科學(xué)與工程;2013年04期

4 ;歐盟創(chuàng)新型大功率超級(jí)電容器問(wèn)世[J];功能材料信息;2014年01期

5 周霞芳;;無(wú)污染 充電快 春節(jié)后有望面市 周?chē)?guó)泰院士解密“超級(jí)電容器”[J];環(huán)境與生活;2012年01期

6 江奇,瞿美臻,張伯蘭,于作龍;電化學(xué)超級(jí)電容器電極材料的研究進(jìn)展[J];無(wú)機(jī)材料學(xué)報(bào);2002年04期

7 朱修鋒,王君,景曉燕,張密林;超級(jí)電容器電極材料[J];化工新型材料;2002年04期

8 景茂祥,沈湘黔,沈裕軍,鄧春明,翟海軍;超級(jí)電容器氧化物電極材料的研究進(jìn)展[J];礦冶工程;2003年02期

9 朱磊,吳伯榮,陳暉,劉明義,簡(jiǎn)旭宇,李志強(qiáng);超級(jí)電容器研究及其應(yīng)用[J];稀有金屬;2003年03期

10 賀福;碳(炭)材料與超級(jí)電容器[J];高科技纖維與應(yīng)用;2005年03期

相關(guān)會(huì)議論文 前10條

1 馬衍偉;張熊;余鵬;陳堯;;新型超級(jí)電容器納米電極材料的研究[A];2009中國(guó)功能材料科技與產(chǎn)業(yè)高層論壇論文集[C];2009年

2 張易寧;何騰云;;超級(jí)電容器電極材料的最新研究進(jìn)展[A];第二十八屆全國(guó)化學(xué)與物理電源學(xué)術(shù)年會(huì)論文集[C];2009年

3 鐘輝;曾慶聰;吳丁財(cái);符若文;;聚苯乙烯基層次孔碳的活化及其在超級(jí)電容器中的應(yīng)用[A];中國(guó)化學(xué)會(huì)第15屆反應(yīng)性高分子學(xué)術(shù)討論會(huì)論文摘要預(yù)印集[C];2010年

4 趙家昌;賴春艷;戴揚(yáng);解晶瑩;;扣式超級(jí)電容器組的研制[A];第十二屆中國(guó)固態(tài)離子學(xué)學(xué)術(shù)會(huì)議論文集[C];2004年

5 單既成;陳維英;;超級(jí)電容器與通信備用電源[A];通信電源新技術(shù)論壇——2008通信電源學(xué)術(shù)研討會(huì)論文集[C];2008年

6 王燕;吳英鵬;黃毅;馬延風(fēng);陳永勝;;單層石墨用作超級(jí)電容器的研究[A];2009年全國(guó)高分子學(xué)術(shù)論文報(bào)告會(huì)論文摘要集（上冊(cè)）[C];2009年

7 趙健偉;倪文彬;王登超;黃忠杰;;超級(jí)電容器電極材料的設(shè)計(jì)、制備及性質(zhì)研究[A];中國(guó)化學(xué)會(huì)第27屆學(xué)術(shù)年會(huì)第10分會(huì)場(chǎng)摘要集[C];2010年

8 張琦;鄭明森;董全峰;田昭武;;基于薄液層反應(yīng)的新型超級(jí)電容器——多孔碳電極材料的影響[A];中國(guó)化學(xué)會(huì)第27屆學(xué)術(shù)年會(huì)第10分會(huì)場(chǎng)摘要集[C];2010年

9 馬衍偉;;新型超級(jí)電容器石墨烯電極材料的研究[A];第七屆中國(guó)功能材料及其應(yīng)用學(xué)術(shù)會(huì)議論文集（第7分冊(cè)）[C];2010年

10 劉不厭;彭喬;孫s，

本文編號(hào)：1777785