کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1295926 1498287 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Lithium ion insertion properties of nanocrystalline anatase titanium oxides prepared from peroxo-polytitanic acid
ترجمه فارسی عنوان
خواص درون یون لیتیوم اکسید تیتانیوم آناتاز نانوکریستالین آماده شده از اسید پراکسو پلیتیتانیک
کلمات کلیدی
لیتیم، اکسید تیتانیوم، باتری، آناتاز، پراکسید
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی


• Titanium was solubilized into hydrogen peroxide to form peroxo-polytitanic acid.
• We prepared nanocrystalline anatase titanium oxide from peroxo-polytitanic acid.
• The capacity of a 25 nm-sized anatase TiO2 was 158 mA h/g as anode for LIB.
• Site energy distribution was calculated from the charge–discharge curves.
• Nanocrystals showed sharp energy distribution compared with amorphous phase.

Peroxo-polytitanic acid (Ti-iPA) solution was obtained by using a reaction between metallic Ti powder and 30 wt.% aq. H2O2. Amorphous titanium oxide was prepared by drying Ti-iPA solution at 115 °C, and nanocrystalline anatase titanium oxide was prepared by heating the amorphous phase at 300–500 °C. The crystal structure was the same as that of the conventional anatase form. The anatase titanium oxide obtained by heating at 300 °C for 5 h with an average particle size of 25 nm showed the capacity of 158 mA h/g as negative electrode for lithium ion batteries. The capacity was increased with increasing the heating time at 300 °C and reduced with increasing the heating temperature to 400–500 °C. The lithium insertion/deinsertion performance was enhanced by heating at 300 °C because lattice defects were reduced without crystal growth and aggregation. We also calculated site energy distribution from the deconvolution of experimental discharge curves, and discussed the relationship between the structure and the insertion site.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 255, 1 February 2014, Pages 60–64
نویسندگان
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