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使用表面分析仪器对铅酸蓄电池负极Pb周围的Pb和S元素的分布进行测试,用以描述Pb SO4在负极的结晶堆积。在不同的老化(Aged)试验阶段,确认Pb SO4的堆积分布情况,就可以评估电池的有效寿命。通过对某一试验阶段的铅酸蓄电池负极材料的测试,展示了电子探针显微分析仪(EPMA)在此类微区分布测试的特性,同时也对比了能谱仪(EDS)和波谱仪(WDS)的性能差异,以及扫描电镜(SEM)+波谱仪和电子探针显微分析仪的特点,指出在微区分析中分辨率和灵敏度两个方面,特别是低含量元素的解析方面,电子探针显微分析仪均有突出的优势。
The distribution of Pb and S elements around the negative lead Pb of the lead-acid battery was tested using a surface analysis instrument to describe the crystallization of Pb SO4 at the negative electrode. In different Aged test stages, confirming the accumulation of Pb SO4 distribution, we can evaluate the effective life of the battery. By testing the lead-acid battery negative electrode material in a certain experimental stage, the characteristics of the EPMA in this kind of micro-area distribution test were demonstrated. The energy dispersive spectrometer (EDS) and spectrometer (WDS) as well as the characteristics of scanning electron microscopy (SEM) + spectrometer and electron probe microanalyser, pointing out that in the resolution and sensitivity of micro-area analysis, especially in the analysis of low-content elements, Electronic probe microanalysis have outstanding advantages.