纳米至微型硫酸铅颗粒的生长机理,ACS Omega

当前位置： X-MOL 学术 › ACS Omega › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

纳米至微型硫酸铅颗粒的生长机理
ACS Omega ( IF 3.7 ) Pub Date : 2021-04-14 , DOI: 10.1021/acsomega.0c05722
Michael T. Wall ₁ , Jesse Smith ₁ , Matthew Carl ₁ , Marcus L. Young ₁ , Travis Hesterberg ₂ , Tim Ellis ₂

Affiliation

PbSO ₄是铅酸电池充电和放电（例如汽车电池循环）中的关键成分。PbSO ₄是一种不良导体，在放电时会在正极和负极上形成，并在铅酸电池充电时会溶解。随着时间的流逝，PbSO _4的堆积会在电极上发生，最终降低电池的效率。这项研究旨在确定各种溶液中PbSO ₄纳米颗粒的成核和生长机理，以随着时间的推移潜在地减少或控制PbSO ₄在电池电极上的堆积。使用各种反应条件观察到颗粒形态的时间依赖性。硫酸铅₄在不同的反应时间使用预混溶液生成颗粒。使用H ₂ O，丙酮，甲醇，乙醇和异丙醇终止PbSO ₄颗粒的反应和显影。通过透射电子显微镜，高角度环形暗场扫描透射电子显微镜和选择区域电子衍射来表征纳米颗粒的结构。这项研究提供了对PbSO ₄纳米颗粒在各种溶液中形成的机理的了解，并揭示了溶液的复杂程度在PbSO ₄纳米颗粒的成核和生长中起着重要作用。这种见解可以提供减少PbSO ₄有害堆积的途径随着时间的流逝，电池电极上的有机物会增加电池寿命和性能。

"点击查看英文标题和摘要"

Growth Mechanisms of Nano-to Micro-Sized Lead Sulfate Particles

PbSO₄ is a key component in the charging and discharging of lead acid batteries—such as the cycling of automotive batteries. PbSO₄ is a poor conductor that forms on the positive and negative electrodes during discharging and dissolves during charging of a lead acid battery. Over time, buildup of PbSO₄ occurs on the electrodes, ultimately reducing the efficiency of the battery. This study aims to determine the nucleation and growth mechanisms of PbSO₄ nanoparticles in various solutions to potentially reduce or control the buildup of PbSO₄ on battery electrodes over time. The time dependency of particle morphology was observed using various reaction conditions. PbSO₄ particles were created using premixed solutions at various times of reaction. H₂O, acetone, methanol, ethanol, and isopropanol were used to stop the reaction and development of the PbSO₄ particles. The structure of the nanoparticles was characterized via transmission electron microscopy, high-angle annular dark field scanning transmission electron microscopy, and selected area electron diffraction. This study provides insight into the mechanism by which PbSO₄ nanoparticles form in various solutions and reveals that the degree of complexity of the solution plays a large role in the nucleation and growth of the PbSO₄ nanoparticles. This insight can provide avenues to reduce unwanted buildup of PbSO₄ on battery electrodes over time, which can extend battery life and performance.

更新日期：2021-04-28

点击分享查看原文

点击收藏

公开下载

阅读更多本刊新发论文本刊介绍/投稿指南