کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7177429 | 1467027 | 2018 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Stress evolution in elastic-plastic electrodes during electrochemical processes: A numerical method and its applications
ترجمه فارسی عنوان
تکامل استرس در الکترودهای پلاستیکی کششی در طول فرایندهای الکتروشیمیایی: یک روش عددی و کاربردهای آن
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کلمات کلیدی
مکانیک باتری، اتصال الکتروشیمیایی-مکانیکی، تمیزکاری میان، اندازه گیری استرس در محل، روش عنصر محدود
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی مکانیک
چکیده انگلیسی
Monitoring in real time the stress state in high capacity electrodes during charge-discharge processes is pivotal to the performance assessment and structural optimization of advanced batteries. The wafer curvature measurement technique broadly employed in thin-film industry, together with stress analysis using the Stoney equation, has been successfully adopted to measure in situ the stress in thin film electrodes. How large plastic deformation or interfacial delamination during electrochemical cycles in such electrodes affects the applicability of Stoney equation remains unclear. Here we develop a robust electrochemical-mechanical coupled numerical procedure to investigate the influence of large plastic deformation and interfacial failure on the measured stress in thin film electrodes. We identify how the constitutive behavior of electrode materials and film-substrate interfacial properties affect the measured stress-capacity curves of electrodes, and hence establish the relationship of electrode material parameters with the characteristics of stress-capacity curves. Using Li-ions batteries as examples, we show that plastic deformation and interfacial delamination account for the asymmetric stress-capacity loops seen in in situ stress measurements. The methods used here, along with the finite-element code in the supplementary material, may be used to model the electrode behavior as a function of the state of charge.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the Mechanics and Physics of Solids - Volume 116, July 2018, Pages 403-415
Journal: Journal of the Mechanics and Physics of Solids - Volume 116, July 2018, Pages 403-415
نویسندگان
Jici Wen, Yujie Wei, Yang-Tse Cheng,