筒式电池伪柱坐标层析分割方法

IF 4.6 Q1 CHEMISTRY, ANALYTICAL
Dominick P. Guida, Alyssa M. Stavola, Andrew Chihpin Chuang, John S. Okasinski, Matthew T. Wendling, Xiaotong H. Chadderdon and Joshua W. Gallaway*, 
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引用次数: 0

摘要

高分辨率x射线计算机断层扫描(CT)已经成为电池研究的宝贵工具,因为它能够探测密封样品中的相分布。用于描述CT图像堆栈的笛卡尔坐标不适合理解径向依赖关系,就像在线轴型电池中看到的那样。这些筒式电池中最突出的是碱性锌- mno2,它主导了一次电池市场。为了了解这些电池中的材料径向依赖关系,提出了一种将CT数据的笛卡尔坐标近似为伪柱坐标的方法。这很重要,因为径向体积分数是计算电池模型的输出,这将允许电池模型与CT数据的相关性。选择锌-二氧化锰AA电池内部的10个阳极来演示该方法。对于这些,伪半径被定义为在阳极中心集流引脚和分离器之间的相对距离。使用这些阳极,我们验证了这种方法产生的平均一维材料轮廓,与其他方法相比,在极性θ-方向上显示出与阳极的单个局部切片更好的定量匹配。测试的其他方法是基于引脚或分离器平均到绝对中心点的方法。伪圆柱形方法还纠正了在筒式电池中观察到的轻微不对称,因为引脚通常稍微偏离中心,分离器通常具有非圆形形状。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Methods for Tomographic Segmentation in Pseudo-Cylindrical Coordinates for Bobbin-Type Batteries

Methods for Tomographic Segmentation in Pseudo-Cylindrical Coordinates for Bobbin-Type Batteries

High-resolution X-ray computed tomography (CT) has become an invaluable tool in battery research for its ability to probe phase distributions in sealed samples. The Cartesian coordinates used in describing the CT image stack are not appropriate for understanding radial dependencies, like that seen in bobbin-type batteries. The most prominent of these bobbin-type batteries is alkaline Zn–MnO2, which dominates the primary battery market. To understand material radial dependencies within these batteries, a method is presented to approximate the Cartesian coordinates of CT data into pseudo-cylindrical coordinates. This is important because radial volume fractions are the output of computational battery models, and this will allow the correlation of a battery model to CT data. A selection of 10 anodes inside Zn–MnO2 AA batteries are used to demonstrate the method. For these, the pseudo-radius is defined as the relative distance in the anode between the central current collecting pin and the separator. Using these anodes, we validate that this method results in averaged one-dimensional material profiles that, when compared to other methods, show a better quantitative match to individual local slices of the anodes in the polar θ-direction. The other methods tested are methods that average to an absolute center point based on either the pin or the separator. The pseudo-cylindrical method also corrects for slight asymmetries observed in bobbin-type batteries because the pin is often slightly off-center and the separator often has a noncircular shape.

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来源期刊
ACS Measurement Science Au
ACS Measurement Science Au 化学计量学-
CiteScore
5.20
自引率
0.00%
发文量
0
期刊介绍: ACS Measurement Science Au is an open access journal that publishes experimental computational or theoretical research in all areas of chemical measurement science. Short letters comprehensive articles reviews and perspectives are welcome on topics that report on any phase of analytical operations including sampling measurement and data analysis. This includes:Chemical Reactions and SelectivityChemometrics and Data ProcessingElectrochemistryElemental and Molecular CharacterizationImagingInstrumentationMass SpectrometryMicroscale and Nanoscale systemsOmics (Genomics Proteomics Metabonomics Metabolomics and Bioinformatics)Sensors and Sensing (Biosensors Chemical Sensors Gas Sensors Intracellular Sensors Single-Molecule Sensors Cell Chips Arrays Microfluidic Devices)SeparationsSpectroscopySurface analysisPapers dealing with established methods need to offer a significantly improved original application of the method.
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