本文選題：空氣電極 + 防水透氣膜��； 參考：《太原理工大學(xué)》2017年碩士論文

【摘要】：空氣電極是鋁空氣電池的核心。作為氣體擴(kuò)散層,防水透氣膜的性能對(duì)空氣電極影響重大。近年來(lái),在堿性鋁空氣電池空氣電極研究中,以活性炭、乙炔黑和PTFE乳液為材料的防水透氣膜越來(lái)越受人關(guān)注,但其材料配比仍沒(méi)有統(tǒng)一的定論。因此,本文首要目的是匹配堿性鋁空氣電池空氣電極防水透氣膜中活性炭、乙炔黑、PTFE乳液三種材料的質(zhì)量比例,研究各材料對(duì)電極性能的影響。鋁陽(yáng)極是鋁空氣電極的重要部件,陽(yáng)極泡沫化具有進(jìn)一步提升堿性鋁空氣電池性能的潛力,但仍缺少有力的理論依據(jù)。因此,本文的另一目的是研究堿性鋁空氣電池陽(yáng)極泡沫化對(duì)其性能的影響。為了匹配防水透氣膜材料,將活性炭、乙炔黑分別與(60wt%)PTFE乳液?jiǎn)为?dú)壓制成膜,通過(guò)形貌分析和透氣性測(cè)試,確定活性炭、乙炔黑各自與PTFE乳液的匹配質(zhì)量比例。將活性炭和乙炔黑的混合碳材料與PTFE乳液滾壓制成防水透氣膜,并根據(jù)各自匹配PTFE質(zhì)量指定混合膜中PTFE乳液的質(zhì)量,假設(shè)混合物制成的防水透氣膜中PTFE的質(zhì)量與所含活性炭、乙炔黑質(zhì)量線性相關(guān)。將混合碳材料制備的防水透氣膜應(yīng)用于空氣電極氣體擴(kuò)散層,通過(guò)堿性環(huán)境下的電化學(xué)測(cè)試結(jié)果對(duì)假設(shè)進(jìn)行驗(yàn)證,并根據(jù)膜中孔徑分布和比表面積大小對(duì)匹配結(jié)果進(jìn)行解釋。將活性炭篩分成200目、300目和400目三種粒度,分別制成相應(yīng)的防水透氣膜進(jìn)行研究和比較,以提高實(shí)驗(yàn)結(jié)果的準(zhǔn)確性,同時(shí)研究活性炭粒度對(duì)膜性能的影響。以所需含量較少的鉑碳為催化劑,并以活性炭、乙炔黑、PTFE乳液為主要材料制備催化膜,將防水透氣膜材料質(zhì)量比匹配結(jié)果應(yīng)用于空氣電極催化膜中相應(yīng)材料,忽略催化劑含量對(duì)膜防水和透氣性的影響,測(cè)試由其制備的空氣電極的極化特性,驗(yàn)證防水透氣膜中材料匹配結(jié)果在催化膜中的適用性,以擴(kuò)大匹配結(jié)果的適用范圍。為了研究堿性鋁空氣電池陽(yáng)極泡沫化的影響,將泡沫鋁電極轉(zhuǎn)化為在垂直于電極表面方向上投影面積增加而在平行于電極表面方向上投影面積不變的電極模型,忽略由閉孔引起的電極反應(yīng)表面與測(cè)試對(duì)電極之間產(chǎn)生的距離變化的影響。以強(qiáng)堿為電解質(zhì),在三電極體系下對(duì)豎直和水平方向上三種面積的純鋁片電極進(jìn)行電化學(xué)測(cè)試,得到其Tafel極化曲線和電化學(xué)阻抗譜圖。通過(guò)分析比較豎直和水平方向上不同面積鋁片電極在堿性電解質(zhì)中的腐蝕參數(shù),研究豎直和水平方向上鋁電極面積變化對(duì)電極性能的影響,并根據(jù)電極阻抗參數(shù)變化解釋其原因,進(jìn)而推導(dǎo)出堿性鋁空氣電池陽(yáng)極泡沫化對(duì)電極及電池性能的影響,為多孔鋁及鋁合金陽(yáng)極在鋁空氣電池上的應(yīng)用提供理論依據(jù)。
[Abstract]:Air electrode is the core of aluminum air battery. As a gas diffusion layer, the performance of waterproof gas permeable film has a great influence on the air electrode. In recent years, in the study of air electrode of alkaline aluminum air battery, the waterproof and breathable film made of activated carbon, acetylene black and PTFE emulsion has attracted more and more attention. Therefore, the primary purpose of this paper is to match the mass ratio of activated carbon and acetylene black PTFE emulsion in the air electrode waterproof and gas permeable membrane of alkaline aluminum air battery, and to study the effect of each material on the performance of the electrode. Aluminum anode is an important part of aluminum air electrode. Anode foaming has the potential to further improve the performance of alkaline aluminum air battery, but it is still lack of theoretical basis. Therefore, another purpose of this paper is to study the effect of anode foaming on the performance of alkaline aluminum air battery. In order to match the waterproof and breathable membrane materials, activated carbon, acetylene black and PTFE emulsion were pressed separately to form film. The matching mass ratio of activated carbon and acetylene black to PTFE emulsion was determined by morphology analysis and permeability test. The mixture carbon material of activated carbon and acetylene black was rolled into PTFE emulsion to form waterproof permeable film, and the quality of PTFE emulsion in mixture film was determined according to the respective matching quality of PTFE. The mass of PTFE in the mixture was assumed to be the mass of PTFE and active carbon contained in the waterproof permeable film. Acetylene black mass linear correlation. The waterproof permeable membrane prepared by mixed carbon material was applied to the gas diffusion layer of air electrode. The hypothesis was verified by electrochemical test results in alkaline environment and the matching results were explained according to the pore size distribution and specific surface area of the film. The activated carbon was sifted into three sizes of 200 mesh, 300 mesh and 400 mesh, and the corresponding waterproof and breathable membranes were prepared for study and comparison, in order to improve the accuracy of the experimental results, and at the same time to study the effect of the size of activated carbon on the performance of the membrane. The catalytic membrane was prepared by using activated carbon and acetylene black PTFE emulsion as the main materials. The mass ratio matching results of the waterproof and permeable membrane materials were applied to the corresponding materials in the air electrode catalytic membrane. The effect of catalyst content on the waterproof and permeability of the membrane was ignored, and the polarization characteristics of the air electrode prepared by the catalyst were tested, and the applicability of the material matching results in the membrane was verified, so as to expand the applicable range of the matching results. In order to study the effect of anodic foaming of alkaline aluminum-air battery, the aluminum foamed electrode was transformed into an electrode model with an increase in projection area perpendicular to the surface of the electrode and no change in the projection area parallel to the surface of the electrode. The influence of the electrode reaction surface caused by the closed pore and the measurement on the distance between the electrodes was ignored. The Tafel polarization curves and electrochemical impedance spectra of three kinds of pure aluminum sheet electrodes in vertical and horizontal direction were measured by using strong alkali as electrolyte in the system of three electrodes. By analyzing and comparing the corrosion parameters of aluminum sheet electrodes with different areas in the vertical and horizontal directions in alkaline electrolytes, the effect of the area variation of aluminum electrodes in vertical and horizontal directions on the performance of the electrodes is studied. The reason is explained according to the change of electrode impedance parameters, and the influence of anode foaming on electrode and battery performance is deduced, which provides a theoretical basis for the application of porous aluminum and aluminum alloy anode in aluminum air battery.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM911.41

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