本文選題：金屬氧化物納米片 + 電極材料�。� 參考：《鄭州輕工業(yè)學(xué)院》2017年碩士論文

【摘要】：社會經(jīng)濟(jì)快速發(fā)展帶來一系列的能源短缺、生態(tài)環(huán)境污染等問題,已經(jīng)成為當(dāng)今人類健康生存亟需解決的重大問題。近年來,尋找可持續(xù)綠色能源成為人們研究的焦點(diǎn)。電化學(xué)電容器作為一種新型的儲能裝置,因其具有優(yōu)異的電化學(xué)性能和對環(huán)境友好等優(yōu)勢,備受重視。高性能電極材料,作為影響電化學(xué)電容器性能的關(guān)鍵因素之一,它的研究不斷開展。二維金屬氧化物納米材料具有高比表面積、高理論容量和開放的短程離子傳輸?shù)葍?yōu)良特征,在電化學(xué)電容器的實(shí)際應(yīng)用中具有很高的研究價(jià)值。本研究制備出新型二維Ni(OH)2、NiO、α-Fe2O3金屬氧化物納米材料,結(jié)合不同的制備工藝進(jìn)行探究,并研究了其與石墨烯復(fù)合后的儲能性能。主要內(nèi)容如下:(1)采用水熱法制備出二維Ni(OH)2、NiO、α-Fe2O3金屬氧化物納米材料,研究了水熱反應(yīng)溫度和反應(yīng)時間對Ni(OH)2納米片材料形貌、結(jié)構(gòu)和電化學(xué)性能的影響,從而獲得最優(yōu)儲能性能的反應(yīng)條件為140℃和10 h。同時也探究了Ni(OH)2納米片轉(zhuǎn)化為二維NiO納米片的最佳退火條件及其電化學(xué)性能。(2)以水熱法制備出的二維Ni(OH)2納米片和溶劑熱法制備的α-Fe2O3納米片為原料,通過控制兩者復(fù)合比例進(jìn)行水熱反應(yīng),獲得的NFC8(Ni(OH)2與α-Fe2O3的質(zhì)量比為8:1)在2 A g-1高電流密度下獲得了1745.33 F g-1的比電容,并且在20 A g-1的電流密度下,3000次恒流充放電循環(huán)后仍保留84.28%的比容量,表明所獲得的新型二維納米結(jié)構(gòu)的NFC8在商業(yè)實(shí)際應(yīng)用中具有極大的潛在價(jià)值。(3)通過控制Ni(OH)2納米片與MoS2納米片的復(fù)合比例,利用水熱法合成了一種新型的納米結(jié)構(gòu)Ni(OH)2/MoS2復(fù)合材料(NMCs)。所獲得的NMC8(Ni(OH)2與MoS2質(zhì)量之比為8:1)電極具有最優(yōu)異的電化學(xué)性能,在1 A g-1的電流密度下具有1677.49 F g-1的高比電容;當(dāng)功率密度為750 W kg-1時,其能量密度達(dá)到57.27 W h kg-1;10000個循環(huán)周期后電容量仍為初始電容量的90.06%,顯示出了優(yōu)異的循環(huán)穩(wěn)定性。(4)采用一步水熱法分別合成石墨烯與Ni(OH)2、NiO新型納米片復(fù)合材料,并通過控制復(fù)合比例,探討了石墨烯含量對復(fù)合材料電化學(xué)能量存儲性能的影響,獲得的NGC8(Ni(OH)2與石墨烯的質(zhì)量比為8:1)復(fù)合材料的比容量在0.8 A g-1的電流密度下高達(dá)1862.2 F g-1,并且具有優(yōu)異的穩(wěn)定性。而且當(dāng)NGC8轉(zhuǎn)化為NrC8(NiO與石墨烯的質(zhì)量比為8:1)時,相比同類復(fù)合材料,仍保持優(yōu)異的電化學(xué)儲能性能。
[Abstract]:The rapid development of social economy has brought a series of energy shortage, ecological environment pollution and so on. It has become a major problem to be solved urgently. In recent years, searching for sustainable green energy has become the focus of people's research. As a new type of energy storage device, electrochemical capacitor has excellent electrochemical properties. High performance electrode materials, as one of the key factors affecting the performance of electrochemical capacitors, have been carried out continuously. The two dimensional metal oxide nanomaterials have high specific surface area, high theoretical capacity and open short range ion transmission. The new two-dimensional Ni (OH) 2, NiO, and alpha -Fe2O3 metal oxide nanomaterials were prepared in this study, and the energy storage properties of the composite were studied in combination with graphene. The main contents were as follows: (1) the two-dimensional Ni (OH) 2, NiO, and alpha -Fe2O3 metal oxide nanoparticles were prepared by hydrothermal method. Materials, the effects of hydrothermal reaction temperature and reaction time on the morphology, structure and electrochemical properties of Ni (OH) 2 nanomaterials were investigated. The optimum reaction conditions for obtaining the best energy storage properties were 140 and 10 h., and the optimum annealing conditions and electrochemical properties of Ni (OH) 2 nanometers transformed into two-dimensional NiO nanoscale were also explored. (2) hydrothermal method A two-dimensional Ni (OH) 2 nanometers and a solvothermal method of alpha -Fe2O3 nanoscale were prepared as raw materials. By controlling the mixture ratio for hydrothermal reaction, the obtained NFC8 (Ni (OH) 2 and the mass ratio of alpha -Fe2O3 was 8:1) and obtained a specific capacitance of 1745.33 F g-1 under the high current density of 2 A g-1, and 3000 constant current charge under the 20 current density. After the discharge cycle still retained the specific capacity of 84.28%, indicating that the new two-dimensional nanostructure NFC8 has great potential value in commercial practice. (3) a new type of nanostructured Ni (OH) 2/MoS2 composite (NMCs) was synthesized by controlling the composite ratio of Ni (OH) 2 nanoscale and MoS2 nanoscale. The NMC8 (Ni (OH) 2 and MoS2 mass ratio is 8:1) with the most excellent electrochemical performance, with a high specific capacitance of 1677.49 F g-1 under the current density of 1 A g-1; when the power density is 750 W kg-1, the energy density is 57.27 W, and the capacity of the 10000 cycles is still 90.06% of the initial capacitance. (4) one step hydrothermal method was used to synthesize graphene and Ni (OH) 2, NiO nanocomposite, and by controlling the compound ratio, the effect of graphene content on the electrochemical energy storage performance of the composite was investigated, and the ratio of NGC8 (Ni (OH) 2 and the mass ratio of stone to 8:1) was 0.8 A g-1. The flow density is up to 1862.2 F g-1 and has excellent stability. And when NGC8 is converted to NrC8 (the mass ratio of NiO and graphene is 8:1), the electrochemical energy storage performance of the same composite remains excellent compared to the same composite.
【學(xué)位授予單位】：鄭州輕工業(yè)學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TB383.1;TM53

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