کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11001504 | 460076 | 2018 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A three-dimensional LiVPO4F@C/MWCNTs/rGO composite with enhanced performance for high rate Li-ion batteries
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: A three-dimensional LiVPO4F@C/MWCNTs/rGO composite with enhanced performance for high rate Li-ion batteries A three-dimensional LiVPO4F@C/MWCNTs/rGO composite with enhanced performance for high rate Li-ion batteries](/preview/png/11001504.png)
چکیده انگلیسی
Lithium vanadium fluorophosphate (LiVPO4F) composite with three-dimensional conductive networks architecture is synthesized with synergistic modification of pyrolytic carbon (C), multi-walled carbon nanotubes (MWCNTs) and graphene sheets (rGO). The differences between LiVPO4F@C, LiVPO4F@C/MWCNTs, LiVPO4F@C/rGO and LiVPO4F@C/MWCNTs/rGO composites are compared through a variety of characterization means. By means of SEM and TEM analysis, it can be seen that pyrolyzed C, MWCNTs and rGO are interwoven, which forms a three-dimensional conductive network structure wrapping the LiVPO4F particles. The difference of discharge specific capacity between LiVPO4F@C and LiVPO4F@C/MWCNTs/rGO composites is becoming larger and larger with the increase of charge-discharge rate. Additionally, CV and EIS results indicate that the LiVPO4F@C/MWCNTs/rGO has the smallest polarization value and charge transfer impedance (Rct) as well as the highest diffusion coefficient of lithium ion (DLi+) in all samples. Consequently, LiVPO4F@C/MWCNTs/rGO composite exhibits a high rate capability (97.9â¯mAh/g cycles at 10â¯C) and cycling stability (93.74% capacity retention over 800 cycles at 10â¯C)ï¼showing potential application for high power LIB with high voltage.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 292, 1 December 2018, Pages 502-510
Journal: Electrochimica Acta - Volume 292, 1 December 2018, Pages 502-510
نویسندگان
Guorong Hu, Zhanggen Gan, Yanbing Cao, Ke Du, Yao Du, Zhongdong Peng,