کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
185665 459601 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Impact of composite structure and morphology on electronic and ionic conductivity of carbon contained LiCoO2 cathode
ترجمه فارسی عنوان
اثر ساختار و مورفولوژی کامپوزیت بر روی هدایت الکتریکی و هدایت یونی کربن شامل کاتد لیتوفون 2
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی

Cathodes in lithium ion batteries consist of an ionic conductor, an electronic conductor and a binder in order to make a composite that is both electronically and ionically conductive. The carbon coating on the cathode material plays a critical role for the electrochemical properties of lithium ion batteries due to the increased electronic conductivity. We explain the relationship between the electrochemical properties and the characteristics of composites prepared using the ball-milling process in this report. We investigated two types of carbonaceous materials (graphite and carbon black) in LiCoO2 electrodes. These selected carbon materials have different characteristics and structure upon ball-milling with LiCoO2. The composite prepared by ball-milling for 5 min leads to better mixing of carbon and LiCoO2, an intimate contact of carbon on LiCoO2, a higher lithium ion diffusion (DLi) than non ball-milled and longer ball-milled composites. On the other hand, a longer time of ball-milling (30 and 60 min) decreases the electronic and ionic conductivity due to an increase of disordered structure of carbon and a thick and dense carbon coating layer on LiCoO2 particles, preventing the diffusion of lithium ions, respectively.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 134, 10 July 2014, Pages 215–221
نویسندگان
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