【摘要】 本文提出一种新的方法制备电极来研究铅酸蓄电池正极板化成的微区反应。电极是用化学纯PbO 粉末,加入一定量H₂SO₄的溶液,混合后在模具内压制成。密度达7.7g/cm³。在H⁺,SO₄⁼离子流在电极中呈单向扩散的情况下,研究了硫酸电解液中不同电化学条件的PbO→PbO₂反应。用X-射线衍射及扫描电镜观察了电极化成的微区反应特征。实验结果表明:化成过程生成了一系列的化合物:PbSO₄,PbO·PbSO₄,2PbO·PbSO₄,3PbO·PbSO₄,3PbO·PbSO₄·H₂O 以及α-PbO₂,β-PbO₂。反应的初次产物是PbSO₄,3PbO·PbSO₄·H₂O 及PbO·PbSO₄。而后,3PbO·PbSO₄·H₂O 及PbO·PbSO₄首先氧化成PbO₂。PbSO₄是一个最后被氧化的化合物。实验结果,对指导化成的实践具有一定意义。更多还原

【Abstract】 The formation process of the Pb-acid battery positive plates was studied byusing a new preparative method.The electrodes under study,with a density of7.7 g/cm³,were prepared by mixing the chemically pure PbO powder with asuitable amount of H₂SO₄ solutions,and formed by pressing in a tool.When boththe H⁺ and SO₄⁼ ion flows were established in one-way direction diffusion inthe electrodes,the reaction of PbO to PbO₂ in H₂SO₄ electrolytes under variouselectro-chemical conditions was examined.The micro-zone reaction characteristicsformed in the formation process of the electrodes were observed by means ofX-ray diffraction and SEM.The experimental results showed that there werea series of compounds such as PbSO₄,PbO·PbSO₄,2PbO·PbSO₄,3PbO·PbSO₄,3PbO·PbSO₄.H₂O and α-PbO₂,β-PbO₂ produced in the above-mentionedreactions,among which PbSO₄,3PbO·PbSO₄·H₂O and PbO·PbSO₄ were theinitial products,3PbO·PbSO₄·H₂O and PbO·PbSO₄ were first oxidized to PbO₂,while PbSO₄ was the last compound oxidized.更多还原