کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7991778 | 1516144 | 2018 | 28 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Titania and nitrogen-doped carbon co-modification: Their synergic effects on the electrochemical performance of LiFePO4
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Titania and nitrogen-doped carbon co-modification: Their synergic effects on the electrochemical performance of LiFePO4 Titania and nitrogen-doped carbon co-modification: Their synergic effects on the electrochemical performance of LiFePO4](/preview/png/7991778.png)
چکیده انگلیسی
TiO2 and N-doped carbon co-modified LiFePO4 composites (LFP-TiO2-C-N) have been successfully synthesized by using tetrabutyl titanate (TBOT) and dopamine (DPA) as titanium and N-doped carbon sources, respectively. The LiFePO4 modification is performed by dopamine polymerization in the alkaline environment supplied by the TBOT hydrolyzation process. The resulting LFP-TiO2-C-N materials are characterized by EDS, XPS, TG, ICP and HRTEM to confirm the close adhesion of TiO2 nanoparticles and N-doped carbon layers on the LiFePO4 surfaces. The charge-discharge tests demonstrate that the LFP-TiO2-C-N composites deliver a superior initial capacity of 165.3â¯mAh·gâ1â¯at 0.1â¯C and high rate performance with discharge capacities of 145â¯mAh·gâ1â¯at 1â¯C and 124â¯mAh·gâ1â¯at 2â¯C. The LFP-TiO2-C-N composites can retain 99.4% of the initial capacity after 50 cycles at 1â¯C, revealing a stable cycling stability. Therefore, the synergistic growth of TiO2 and N-doped carbon on the LFP surface could result in the synergic improvement in the electrochemical performance of cathode.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 750, 25 June 2018, Pages 139-146
Journal: Journal of Alloys and Compounds - Volume 750, 25 June 2018, Pages 139-146
نویسندگان
Jiayuan Shi, Xiaoqing Zhang, Xiaokun Zhang, Yong Xiang,