کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
185770 459603 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Outstanding rate capability and long cycle stability induced by homogeneous distribution of nitrogen doped carbon and titanium nitride on the surface and in the bulk of spinel lithium titanate
ترجمه فارسی عنوان
توانایی برجسته و ثبات چرخه طولانی ناشی از توزیع همگن کربن دوتایی نیتروژن و نیترید تیتانیوم بر روی سطح و در قسمت عمده تیتانات لیتیوم اسپینل
کلمات کلیدی
باتری های لیتیوم یون، تیتانات لیتیم، نیکل کربن، نیترید تیتانیوم، دوپینگ
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• N-doped carbon and TiN distribution throughout the whole particle of LTO is prepared.
• Carbon and N enter the bulk of LTO through the interlayer galleries of precursor.
• Carbon promotes the formation of TiN and resulting in improved conductivity.
• The samples exhibit markedly improved electrochemical properties.

N-doped carbon and TiN composite conductive structure with homogeneous distribution on the surface and in the bulk of spinel lithium titanate (Li4Ti5O12) nanoparticles is prepared via a simple one-step chemical vapor deposition assisted solid-state route in the presence of layered structure sodium titanate nanotubes as the titanium source and ethylenediamine as the carbon and nitrogen source. Results indicate that as-fabricated Li4Ti5O12 samples containing N-doped carbon and TiN composite conductive structure exhibit markedly improved electrochemical properties as compared with pristine Li4Ti5O12. Particularly, the electrode made from Li4Ti5O12 containing N-doped carbon and TiN composite conductive structure obtained after 60 min of treatment in the presence of ethylenediamine has a high capacity of 162 mAh·g−1 at a charge/discharge rate of 20C as well as a substantial capacity of 92% and a capacity retention of 75% after 2500 cycles at 10C, showing superior electrochemical performance and great potential as an anode material for high-rate lithium-ion batteries. The enhanced electrochemical performance of the composite electrodes can be attributed to the small size of Li4Ti5O12 nanoparticles as well as the uniform distribution of N-doped carbon and TiN composite conductive structure on the surface and in the bulk of Li4Ti5O12 nanoparticles.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 132, 20 June 2014, Pages 230–238
نویسندگان
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