کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5014651 1369402 2016 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Phase field modeling of lithium diffusion, finite deformation, stress evolution and crack propagation in lithium ion battery
ترجمه فارسی عنوان
مدل سازی فاز انتشار لیتیوم، تغییر شکل محدود، تکامل استرس و انتشار ترک در لیتیوم یون باتری
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
چکیده انگلیسی
Mechanical degradation under cyclic charging and discharging has been the one of the most important bottlenecks for the developments of lithium ion batteries. Understanding of stress evolution process of anode during cycling is a way to deeply understand the mechanical degradation. In this paper, a phase field model (PFM) coupling lithium diffusion, finite deformation, stress evolution with crack propagation is established. Then the model is applied to spherical silicon particle to explore the stress evolution with taking account of finite deformation, elastic softening and plastic flow. The numerical results show that small deformation model and finite deformation model provide different stress states especially when the anode undergoes a large volumetric expansion. Elastic softening has not a significant effect on stress evolution in spherical particle. Plastic flow decreases the magnitude of stress, and deeply changes the stress evolution, making the hoop stress near the particle surface to become positive during charge process, indicating the particle surface is subjected to tensile hoop stress.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Extreme Mechanics Letters - Volume 9, Part 3, December 2016, Pages 467-479
نویسندگان
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