کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
607284 1454572 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
In situ atomic force microscopy analysis of morphology and particle size changes in Lithium Iron Phosphate cathode during discharge
ترجمه فارسی عنوان
تجزیه و تحلیل میکروسکوپ نیروی اتمی بر اساس مورفولوژی و تغییر اندازه ذرات در کاتد آهن فسفات لیتیوم در طول تخلیه
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
چکیده انگلیسی


• Three different in situ AFM cells, coin, Li-wire and Li-foil, are presented.
• Li-foil cell is recommended due to easiness of the assembly process.
• LiFePO4 particles showed 1.8–14.3% increase in surface area during discharge.

Li-ion batteries offer great promise for future plug-in hybrid electric vehicles (PHEVs) and pure electric vehicles (EVs). One of the challenges is to improve the cycle life of Li-ion batteries which requires detailed understanding of the aging phenomenon. In situ techniques are especially valuable to understand aging since it allows monitoring the physical and chemical changes in real time. In this study, in situ atomic force microscopy (AFM) is utilized to study the changes in morphology and particle size of LiFePO4 cathode during discharge. The guidelines for in situ AFM cell design for accurate and reliable measurements based on different designs are presented. The effect of working electrode to counter electrode surface area ratio on cycling data of an in situ cell is also discussed. Analysis of the surface area change in LiFePO4 particles when the cell was cycled between 100% and 70% state of charge is presented. Among four particles analyzed, surface area increase of particles during Li intercalation of LiFePO4 spanned from 1.8% to 14.3% indicating the inhomogeneous nature of the cathode surface.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Colloid and Interface Science - Volume 423, 1 June 2014, Pages 151–157
نویسندگان
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