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类型交流阻抗模拟软件的应用zview.ppt

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  • 文档编号:997240
  • 上传时间:2018-05-14
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    交流阻抗模拟软件的应用zview.ppt
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    1、Analysis of electrochemical impedance spectra (EIS),Reporter: LingChenMar. 3rd 2006,2,Introduction of EIS,Electrochemical impedance spectroscopy (EIS) is a very powerful tool to analyze the electrochemical electrode reactions and has been commonly used to analyze the electrochemical interface.Impeda

    2、nce spectrums are often modeled using an electrical circuit which produces a similar spectrum. The electrical components (resistors, capacitors, inductors, etc) and some components that have no electrical analog (constant phase elements, Warburg impedances, etc) are then matched to physical characte

    3、ristics of the measured cell.,3,Outline,1.Fit by Zview Software 2.Data preparation 3.Examples,4,1. Fit by Zview,1.1 Circle Fit,The semi-circle fit is a geometric fit not an RC or Equivalent Circuit fit.,5,One method of producing initial values,1. Fit by Zview,1.2 Instant Fit,CPE = Constant Phase Ele

    4、mentParameters: CPE-T, CPE-PZ = 1 / T(i)P,Often a CPE is used in a model in place of a capacitor to compensate for non-homogeneity in the system.,6,1. Fit by Zview,1.3 Equivalent Circuits Fit,7,1.4 Examples,Example 1Example 2,8,2.1 Experiment results,Z Z,f p,f Z,2.Data preparation,9,2.2 Data Transfo

    5、rmation,The data is transformed to ASCII form by Origin software,2.Data preparation,10,Example,11,Summarization,We must rely on our own knowledge of the physical system we are measuring. It can also be helpful to see if the model gives “reasonable” values.Real experimental data is usually harder to model so we need take our time and work our way to finally fitting the data.,Thanks!,

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