کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5458956 1516175 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Iron fluoride microspheres by titanium dioxide surface modification as high capacity cathode of Li-ion batteries
ترجمه فارسی عنوان
میکروسپرسهای فلوراید آهن توسط تغییر سطح دی اکسید تیتانیوم به عنوان کاتدی با ظرفیت بالا از باتری های لیتیوم یون
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
چکیده انگلیسی
The spherical FeF3·0.33H2O cathode material is successfully modified with a TiO2 coating via a simple solvothermal method. The effects of nanosized TiO2 coating on the morphology structure, and electrochemical performance of spherical FeF3·0.33H2O cathode material are characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and electrochemical test, respectively. The results demonstrate that FeF3·0.33H2O sample is spherical morphology with the average particle size of about 1.0 μm and good dispersity, as well as the nanosized TiO2 layer is uniformly coated on the surface of the FeF3·0.33H2O spheres. Besides, the nanosized TiO2-coated FeF3·0.33H2O sample exhibits a high initial discharge capacity of 654 mAh g−1 and the corresponding charge capacity of 522 mAh g−1 at 0.1 C between 1.5 V and 4.5 V. Especially, the nanosized TiO2-coated FeF3·0.33H2O sample still possesses good cycling stability of 264 mAh g−1 after 200 cycles at 0.2 C. Thus, the modification of spherical FeF3·0.33H2O with nanosized TiO2 layer will be a promising strategy for improving cycle life and structure stability, and promoting its wide application in high performance LIBs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 719, 30 September 2017, Pages 331-340
نویسندگان
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