摘要在本文中,对于La-Mg-Ni 系储氢合金进行了系统综合的分析。在结合各项分析后选取A5B19型储氢合金作为本次课题的研究对象。通过分析,我们决定采用La0。85Mg0。15Ni2。75Co1。05储氢合金。通过对A5B19型(Ce5Co19+Pr5Co19)储氢合金的研究,来提高镍氢电池(Ni/MH)的电化学性能,从而能够更好更快的使镍氢电池(Ni/MH)产品化。镍氢电池(Ni/MH)中我们主要考虑的电化学性能有:最大放电容量、循环稳定性、氢扩散系数以及活化性能。86742
在本文中,我们主要研究的是在不同测试条件下La0。85Mg0。15Ni2。75Co1。05储氢合金电化学性能影响因素。通过退火处理,可以有效改善合金的综合性能。同时,考虑到在试验中退火温度和时间都对实验结果有影响。因此,在试验中我们要保持一定的退火温度和时间。
在合金进行退火处理后,合金的电化学性能与A5B19型的相丰度有很大关系。通过在合金中添加C、CuO和Al2O3,并且同时改变添加物质的含量来改善合金电极的电化学性能。通过实验以及研究分析,在保持8小时退火时间和900℃退火温度的条件下,添加5%的CuO能够很好的改善合金电极的电化学性能。
毕业论文关键词:A5B19型储氢合金、电化学性能、镍氢电池、退火处理
Abstract In this article, the La-Mg-Ni-based hydrogen storage alloys systematically comprehensive analysis。 After combining the analysis of selected A5B19 type hydrogen-absorbing alloy for the study of this subject。 Through analysis, we decided to use La0。85Mg0。15Ni2。75Co1。05 hydrogen storage alloy。 Through the study of A5B19 type (Ce5Co19 + Pr5Co19) hydrogen storage alloy to improve the Ni-MH battery (Ni / MH) electrochemical properties, and thus better able to make Ni-MH battery (Ni / MH) faster commercialization。 Ni-MH battery(Ni / MH) electrochemical performance of our main considerations are: the maximum discharge capacity, cycle stability, hydrogen diffusion coefficient and activation properties。
In this study, we focus on the electrochemical properties of hydrogen storage alloys La0。85Mg0。15Ni2。75Co1。05 factors under different test conditions。 By annealing,it can effectively improve the overall performance of the alloy。 At the same time, taking into account the experimental annealing temperature and time have an impact on the results。 Thus, in the experiment we want to maintain a certain annealing temperature and time。
In the alloy after annealing treatment, the electrochemical performance of alloy A5B19 phase abundance has much to do。 By adding C, CuO and Al2O3 in the alloy, and simultaneously change the content of substances added to improve the electrochemical properties of the alloy electrode。 Through experiments and analysis, for 8 hours at 900 ℃ annealing time and annealing temperature conditions, the addition of 5% of CuO can be a good improvement of the electrochemical properties of the alloy electrode。
Keywords: A5B19 type Hydrogen Storage Alloys、Electrochemical Performance、Ni-MH battery、Annealing treatment
目 录
第一章 绪 论 1
1。1 引言 1
1。2 氢能源的研究及发展 2
1。2。1 煤制氢 2
1。2。2 天然气制氢 2
1。2。3 焦炉煤气制氢 3
1。3 储氢合金的发展 3
1。3。1 AB5型储氢合金 4
1。3。2 AB3型储氢合金 5
1。3。3 AB2型储氢合金 5