کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7724833 | 1497837 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ultrafast hetero-assembly of monolithic interwoven V2O5 nanobelts/carbon nanotubes architectures for high-energy alkali-ion batteries
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Monolithic interwoven composite of V2O5 nanobelts and carbon nanotubes (designated as VNTsâCNTs-40) is prepared via one-pot hydrothermal synthesis and subsequent vacuum filtration. The strong synergistic effect between versatile CNTs and in situ produced V2O5 nanobelts in hydrothermal process leads to the formation of 3D interwoven mesh intermediate with relatively loose and well-reticulated channels which facilitate mass transfer in ultrafast hetero-assembly (â¼30s) of film-like monolithic VNTsâCNTs-40 composite during vacuum filtration. The interconnected CNTs network and interstitial porous channels in the monolithic VNTsâCNTs-40 composite not only improve charge transport during the redox reactions of the active materials, but also serve as a robust and flexible buffer to accommodate the volume change during repetitive ion insertion/extraction. In the evaluation of binder-free cathodes in alkali-ion batteries, the monolithic VNTsâCNTs-40 composite exhibits outstanding alkali-ion storage properties such as high initial capacity (215.2/295.8â¯mAhgâ1 for SIBs/LIBs at a current density of 200â¯mAgâ1), high-rate capability (137.8/156.2â¯mAhgâ1 for SIBs/LIBs at a current density of 800/2000â¯mAgâ1), and superior cycling stability (167/223.5â¯mAhgâ1 for SIBs/LIBs at a current density of 200â¯mAgâ1 after 200 cycles). The monolithic VNTsâCNTs-40 composite has large potential in high-performance alkali-ion batteries.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 395, 15 August 2018, Pages 295-304
Journal: Journal of Power Sources - Volume 395, 15 August 2018, Pages 295-304
نویسندگان
Hui Yang, Guobao Xu, Xiaolin Wei, Juexian Cao, Liwen Yang, Paul K. Chu,