共查询到20条相似文献,搜索用时 125 毫秒
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金属空气电池是一种将化学能转化为电能的发电装置,与燃料电池类似,铝空电池是以铝板为阳极,空气中氧气为阴极的新型电源。空气电极是电池的核心部分。目前,国内对于中性电极寿命影响因素鲜有归纳和验证。本文围绕不同制备工艺进行对比验证,结果发现催化膜挤料0次+压制30次时电极表面不易起泡;催化膜中PTFE质量比≤20%时能获得较好的放电性能;合膜压力20MPa时,电极放电性能最佳,合膜时间随电极面积的增大适当延长;锰基碳复合空气电极不适合进行热处理。 相似文献
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以新型钒基储氢合金为试验对象,对不同Al含量添加对新型钒基储氢电池合金显微组织、吸放氢性能和充放电性能进行了测试、分析和比较。结果表明,随Al含量的添加,新型钒基储氢合金的晶粒先细化后变大,最大吸氢量先增大后减小,充放电性能先减小后增大,显微组织逐渐改善,吸放氢性能和充放电性能先提升后下降。与0.1%Al含量相比,0.3%Al含量时的平均晶粒尺寸减小了15μm,最大吸氢量增大了91.67%,放电容量衰减率减小了25%。新型钒基储氢合金的Al含量优选为:0.3%。 相似文献
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世界铝工业与新技术发展趋势 总被引:8,自引:0,他引:8
扼要介绍世界产铝国家-美国、俄罗斯、加拿大、澳大利亚等国的铝工业以及现代中国铝工业概况。讨论了迈入21世纪的炼铝新技术发展趋势,其中包括:强化氧化铝生产过程,低温铝电解,惰性阴极和阳极,一步制取铝基母合金,洁净铝的化学烽物理技术,废铝回收和再生利用,废旧阴极炭块的综合利用,烟气治理。 相似文献
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V. A. Glushchenkov F. V. Grechnikov D. G. Chernikov A. A. Lazareva 《Russian Journal of Non-Ferrous Metals》2012,53(1):20-25
A method for making electrocontact plugs (ECPs) in anodes for aluminium and magnesium electrolyzers using the pulsed magnetic
field (PMF) action on the metal melt was proposed. Different variants of plug construction are presented. Technology for making
ECPs under laboratory conditions was developed. IFU brand coal-coke material was used in the experiments as an anode material;
a casting aluminium alloy of an Al-Si system was used for ECPs. The results of experimental investigations are given and an
assessment of the quality of the electric contact was carried out. It was found that the contact resistance of the contact
produced under the action of the PMF is much lower than when conventionally pouring the melt. The reduction of this factor
depends on the fact that the melt fills the pores and microirregularities of the carbon block of the anode under the pressure
of the PMF, which results in an increase in the physical area of the contact. 相似文献
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S. V. Skopov S. S. Naboichenko L. I. Galkova 《Russian Journal of Non-Ferrous Metals》2009,50(1):20-23
During the electrosynthesis of manganese dioxide, the anode material and anode current density (i a) exert the largest influence on the characteristics of electrolysis and the quality of the obtained material. The activation of anodes, which consists of the deposition of the titanium-manganese alloy on the titanium base of the electrode by the thermal-diffusion method, prevents passivation at i a = 100 and 200 A/m2. The electrochemical characteristics of electrolysis for NTMA (a built-up titanium-manganese activated anode) and ATDP (an experimental activated anode with thermodiffusion coating) anodes at i a = 100 and 200 A/m2 have close values. The voltage across the bath does not exceed 2.2–3.0 V, the current efficiency is 95–98%, and electrical power consumption is 1.33–1.80 (kW h)/kg. The chemical composition and the crystalline modification of electrical manganese dioxide corresponds to the requirements of GOST (State Standard) 25823-83. The activated ATDP anodes behave similarly to the known HTMA anodes. After electrolysis, no variations in the surface layer are found on them. 相似文献
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采用普通纯镁为原料制备了Mg-Mn牺牲阳极,探讨了水淬温度和时间对镁合金牺牲阳极的电化学性能和晶粒大小的影响。结果表明,在30℃的水中水淬4分钟后,得到的镁合金牺牲阳极的晶粒相对较小且电流效率相对较高。 相似文献
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铜阳极泥成分受电解工艺参数、阳极板质量、现场控制等多种因素的影响,元素种类和含量复杂多变。采用EDTA滴定法检测含高铅、高钡的复杂铜阳极泥中铋时,样品溶解过程常出现不溶结块,从而易对铋形成包裹,导致测定结果误差大、稳定性差。实验采用王水-硫酸溶解样品,在硝酸介质中用EDTA滴定法检测铋含量。通过试验确定称样量为0.2~1.0g并满足溶液中铋质量浓度不小于140mg/L,以硝酸-酒石酸混合酸作为浸取酸,调节溶液pH值至1.5~1.7,用1.060×10-2 mol/L EDTA标准溶液测定铋,终点敏锐。按照实验方法测定铜阳极泥实际样品中铋,测定结果的相对标准偏差(RSD,n=9)为0.86%~1.5%,回收率为98%~101%。方法有效解决了复杂铜阳极泥中的铋量不易准确测定的问题,适用于铋含量为1%~12%(质量分数)的复杂铜阳极泥样品的检测。 相似文献
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铜阳极泥成分受电解工艺参数、阳极板质量、现场控制等多种因素的影响,元素种类和含量复杂多变。采用EDTA滴定法检测含高铅、高钡的复杂铜阳极泥中铋时,样品溶解过程常出现不溶结块,从而易对铋形成包裹,导致测定结果误差大、稳定性差。实验采用王水-硫酸溶解样品,在硝酸介质中用EDTA滴定法检测铋含量。通过试验确定称样量为0.2~1.0g并满足溶液中铋质量浓度不小于140mg/L,以硝酸-酒石酸混合酸作为浸取酸,调节溶液pH值至1.5~1.7,用1.060×10-2 mol/L EDTA标准溶液测定铋,终点敏锐。按照实验方法测定铜阳极泥实际样品中铋,测定结果的相对标准偏差(RSD,n=9)为0.86%~1.5%,回收率为98%~101%。方法有效解决了复杂铜阳极泥中的铋量不易准确测定的问题,适用于铋含量为1%~12%(质量分数)的复杂铜阳极泥样品的检测。 相似文献
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以氯铱酸为主要的前驱体,采用加热分解法制备了不同Ru含量的Ir1-xRuxO2/Ti析氧阳极,并采用扫描电镜,循环伏安,恒电流电解,线性极化等测试手段对电极进行表征和测试。电化学测试结果表明当Ir,Ru的摩尔比为3∶2时,500mA.cm-2恒电流水解电位最低,为1.4V(vs.SCE);循环伏安测试表明,Ir0.6Ru0.4O2/Ti的伏安电量亦达到最高,达到1271mC.cm-2,析氧电催化活性点最多。SEM表面形貌进一步证实了Ru的加入使得电极的表面的多孔结构更加明显,当Ir,Ru摩尔比为3∶2时,电极表面颗粒最小,孔隙率最高,亦表明该电极的电化学活性表面积最大,电催化活性最高。 相似文献
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Monitoring of the quality of a soderberg anode for aluminum electrolyzer with the upper current lead
V. K. Frizorger E. M. Gil’debrandt E. P. Vershinina 《Russian Journal of Non-Ferrous Metals》2010,51(1):39-43
By sampling the cores from the Soderberg anodes of switched-off aluminum electrolyzers, the distribution of the physical properties
over the anode height, including during a variation in temperature, is studied. An analysis is given for the dynamics of the
variation in the quality of anodes from 1993 to 2006. It is shown that the physical properties of the Soderberg anode approach
the requirements made for burnt anodes. 相似文献