Simulation of the diffusional impedance and application to the characterization of electrodes with complex microstructures
Simulation of the diffusional impedance and application to the characterization of electrodes with complex microstructures
复制标题
扩散阻抗模拟及其在复杂微结构电极表征中的应用
DOI:
10.1016/j.electacta.2020.136534
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发表时间:
2020
影响因子:
6.6
通讯作者:
Thornton, K.
中科院分区:
文献类型:
--
作者:
Yu, Hui-Chia;Adler, Stuart B.;Barnett, Scott A.;Thornton, K.
Electrochemical impedance spectroscopy (EIS) has been widely employed to probe material properties in energy materials. One important aspect of EIS is the diffusional impedance. To date, the diffusional impedance behavior is understood based on the analytical solutions of the one-dimensional (1D) diffusion equation. However, transport in materials is strongly influenced by the materials’ three-dimensional (3D) microstructures that often possess complex geometries that are unlike the simplified 1D domains. In this work, we simulate the concentration response driven by oscillating loads by solving the diffusion equation in complex, experimentally determined 3D microstructures obtained from solid oxide fuel cell cathode and lithium-ion battery cathode. The simulation results demonstrate that the diffusional impedance can serve as a new technique for the evaluation of microstructural characteristics of porous media, including the tortuosity, the porosity, and the area of the loading boundary. Our findings open a new array of applications for diffusional impedance measurements.
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DOI:
10.1039/c7cp07101a
发表时间:
2017
期刊:
Physical chemistry chemical physics : PCCP
影响因子:
--
作者:
G. Barbero
通讯作者:
G. Barbero
影响因子:
6.6
作者:
U. Troeltzsch;O. Kanoun
通讯作者:
O. Kanoun
影响因子:
4.5
作者:
J. Dawson;D. G. John
通讯作者:
D. G. John
影响因子:
3.2
作者:
A. Honders;G. Broers
通讯作者:
G. Broers
影响因子:
5
作者:
C. Kreller;M. Drake;S. Adler
通讯作者:
S. Adler