本文選題：鋰-空氣電池 + 過(guò)渡金屬氧化　； 參考：《東北師范大學(xué)》2014年碩士論文

【摘要】：能源是人類(lèi)社會(huì)賴(lài)以生存與發(fā)展的物質(zhì)基礎(chǔ)。隨著世界各國(guó)對(duì)于能源的需求愈發(fā)的強(qiáng)烈，化石燃料迅速消耗，，環(huán)境污染等問(wèn)題日益突出，嚴(yán)重制約著人類(lèi)社會(huì)的“和諧”發(fā)展。為了應(yīng)對(duì)人類(lèi)所面臨的能源危機(jī)，發(fā)展新型且環(huán)境友好的新能源材料體系成為科學(xué)研究工作的熱點(diǎn)。鋰-空氣電池作為一種新型的電池體系，以其極高的能量密度作為新一代儲(chǔ)能設(shè)備，受到了科學(xué)工作者的廣泛關(guān)注。在非水系鋰-空氣電池體系中，催化劑的活性對(duì)電池的性能發(fā)揮著至關(guān)重要的作用。與其他催化材料相比，過(guò)渡金屬氧化物以其低廉的價(jià)格、高的催化活性、環(huán)境友好等優(yōu)勢(shì)成為潛在的鋰-空氣電池理想催化材料。本論文主要研究?jī)煞N類(lèi)型過(guò)渡金屬氧化物催化劑的制備及電化學(xué)性能，其結(jié)果如下： 采用水熱合成-高溫煅燒的方法制備MnCo2O4過(guò)渡金屬氧化物，得到具有多孔結(jié)構(gòu)的MnCo2O4微球。所制備的MnCo2O4微球催化劑在0.1M KOH溶液及有機(jī)電解液中表現(xiàn)出良好的ORR/OER反應(yīng)電催化活性，其歸因?yàn)闃?gòu)筑的多孔結(jié)構(gòu)可提供更多的電化學(xué)催化活性位點(diǎn)。以多孔MnCo2O4微球?yàn)榇呋瘎┓撬典?空氣電池表現(xiàn)出良好的電化學(xué)性能，具有較低的極化， E=1.2V，卓越的放電容量，在電流密度為100mAg-1時(shí)，放電容量為5956.3mAh g-1遠(yuǎn)高于常用的Super P導(dǎo)電碳材料，并且具有較好的循環(huán)穩(wěn)定性，可在純氧氣氛下循環(huán)50次而無(wú)衰減。 采用甘氨酸-硝酸鹽法制備了類(lèi)鈣鈦礦型過(guò)渡金屬氧化物L(fēng)a1.6Sr0.4NiO4及La1.6Sr0.4Ni0.6Cu0.4O4作為非水系鋰-空氣電池陰極催化材料，具有優(yōu)良的電化學(xué)性能，結(jié)果表明合成的Cu元素?fù)诫sLa1.6Sr0.4Ni0.6Cu0.4O4粉體顆粒較小、分散均一，相比于La1.6Sr0.4NiO4具有更好的電化學(xué)活性，在電流密度為0.1mA cm-1時(shí)，電池的首次放電容量為5559.4mAh g-1，高于La1.6Sr0.4NiO4的4602.4mAh g-1并且具有較小的極化，充電平臺(tái)大約為3.8V。同時(shí)，相比于La1.6Sr0.4NiO4，La1.6Sr0.4Ni0.6Cu0.4O4展現(xiàn)出良好的倍率性能及較高的循環(huán)穩(wěn)定性。
[Abstract]:Energy is the material foundation for human society to survive and develop. With the increasingly strong demand for energy in the world, the rapid consumption of fossil fuels, environmental pollution and other problems have become increasingly prominent, seriously restricting the "harmonious" development of human society. In order to deal with the energy crisis, the development of new and environmentally friendly new energy materials system has become a hot spot in scientific research. As a new type of battery system, lithium-air battery is widely concerned by scientists because of its high energy density as a new generation of energy storage equipment. In non-aqueous lithium-air battery system, the activity of catalyst plays an important role in the performance of the battery. Compared with other catalytic materials, transition metal oxide (TME) has become an ideal catalyst for lithium-air batteries due to its advantages of low cost, high catalytic activity and environmental friendliness. In this paper, the preparation and electrochemical properties of two types of transition metal oxide catalysts were studied. The results are as follows: MnCo _ 2O _ 4 transition metal oxide was prepared by hydrothermal synthesis and high temperature calcination. MnCo2O4 microspheres with porous structure were obtained. The prepared MnCo _ 2O _ 4 microsphere catalyst exhibited good electrocatalytic activity in 0.1M Koh solution and organic electrolyte, which was attributed to the porous structure which could provide more electrochemical catalytic activity sites. Using porous MnCo2O4 microspheres as catalyst, the non-aqueous lithium-air battery has good electrochemical performance and has low polarization, with 1.2V, excellent discharge capacity, and when the current density is 100mAg-1. The discharge capacity of 5956.3mAh g-1 is much higher than that of conventional superp conductive carbon materials, and it has good cycling stability. It can be recirculated 50 times in pure oxygen atmosphere without attenuation. The perovskite-type transition metal oxides La1.6Sr0.4NiO4 and La1.6Sr0.4Ni0.6Cu0.4O4 were prepared by glycine-nitrate method as non-aqueous cathode materials for lithium-air batteries. The results showed that the Cu doped La1.6Sr0.4Ni0.6Cu0.4O4 powders were small. When the current density is 0.1mA cm-1, the initial discharge capacity of the battery is 5559.4mAh g-1, which is higher than that of La1.6Sr0.4NiO4 4602.4mAh g-1 and has a small polarization, and the charging platform is about 3.8V.When the dispersion is uniform, the electrochemical activity is better than that of La1.6Sr0.4NiO4. The initial discharge capacity of the battery is higher than that of La1.6Sr0.4NiO4, and the initial discharge capacity is 5559.4mAh g-1 when the current density is 0.1mA cm-1. At the same time, compared with La1.6Sr0.4Ni0.6Cu0.4O4, La1.6Sr0.4Ni0.6Cu0.4O4 shows good rate performance and high cycle stability.
【學(xué)位授予單位】：東北師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TM911.41;O643.36

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 鞠克江;劉長(zhǎng)瑞;唐長(zhǎng)斌;薛娟琴;;鋁空氣電池的研究進(jìn)展及應(yīng)用前景[J];電池;2009年01期

2 郭麗敏;彭章泉;;非水溶劑鋰-空氣電池中的氧氣電極反應(yīng)[J];分析化學(xué);2013年02期

本文編號(hào)：2113796