کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1617197 1005680 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhanced electrochemical performances of multi-walled carbon nanotubes modified Li3V2(PO4)3/C cathode material for lithium-ion batteries
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Enhanced electrochemical performances of multi-walled carbon nanotubes modified Li3V2(PO4)3/C cathode material for lithium-ion batteries
چکیده انگلیسی

The multi-walled carbon nanotubes (MWCNTs) modified Li3V2(PO4)3/C composite is synthesized by polyvinyl alcohol (PVA) based carbon-thermal reduction method using MWCNTs as a highly conductive agent. PVA mainly supplies a reductive atmosphere to reduce V5+ and provides a network of carbon to inhibit the aggregation of Li3V2(PO4)3 particles. The amorphous carbon coating and MWCNTs co-modified composite shows excellent high-rate lithium intercalation/deintercalation property and cycling performance between 3.0 and 4.3 V. The discharge capacities of 131.7 and 122.9 mAh g−1 are obtained at rates of 1 C and 10 C, respectively, for the Li3V2(PO4)3/(C + MWCNTs). These improvements are attributed to the valid conducting networks of C + MWCNTs and the reduced Li3V2(PO4)3 particle size by the network carbon from the pyrolysis of PVA.


► MWCNTs were employed as a highly conductive agent in Li3V2(PO4)3/C. The MWCNTs and the residual C will link the Li3V2(PO4)3 particles effectively. The Li3V2(PO4)3/(C + MWCNTs) showed a discharge capacity of 122.9 mAh g−1 at 10 C.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 509, Issue 25, 23 June 2011, Pages 7181–7185
نویسندگان
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