کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10625289 | 989622 | 2014 | 29 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrochemical performance of LiFePO4@C composites with biomorphic porous carbon loading and nano-core-shell structure
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Electrochemical performance of LiFePO4@C composites with biomorphic porous carbon loading and nano-core-shell structure Electrochemical performance of LiFePO4@C composites with biomorphic porous carbon loading and nano-core-shell structure](/preview/png/10625289.png)
چکیده انگلیسی
Effect of biomorphic porous carbon (BPC) addition on the composition, microstructure, and electrochemical performance of LiFePO4@C/C composites was investigated. Results indicated that network pores of BPC were almost completely filled by LiFePO4@C nanoparticles, which were formed by an olivine structure LiFePO4 core with size that ranged from 58.6 nm to 80.1 nm and an amorphous carbon shell with a thickness of approximately 2 nm. Double electrical conductive networks formed in the composites improved the electrical properties of samples from 2.59Ã10â6 S cmâ1 (sample A-0) to 5.76Ã10â2 S cmâ1 (sample A-20). Synergy effect of electric double layer energy storage produced by BPC and lithium-ion extraction/insertion energy storage by LiFePO4 clearly reduced the capacity reduction rate of composites, and obtained a charge/discharge capacity of 114.2/110.5 mA h gâ1 (sample A-5) at 10 C. Moreover, addition of BPC showed a significant advantage in reducing the interfacial resistance of the electrode reaction in composites from 86.72 Ω (sample A-0) to 37.58 Ω (sample A-20). The electrical conductive mechanism of LiFePO4@C/C composites is discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 40, Issue 8, Part B, September 2014, Pages 13009-13017
Journal: Ceramics International - Volume 40, Issue 8, Part B, September 2014, Pages 13009-13017
نویسندگان
Peng-Zhao Gao, Ling Wang, Dong-Yun Li, Bing Yan, Wei-Wei Gong,