کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6471996 | 1424126 | 2017 | 9 صفحه PDF | دانلود رایگان |
A unique in-situ morphology transition from multiwall carbon nanotubes (MWCNT) to graphene nanosheets (GNS) upon Li intercalation results in enormous increase in capacity of SnO2/MWCNT composites anode during cycling. The anode capacity increases from 330Â mAhgâ1 to 500Â mAhgâ1 which is more than 50% of its initial capacity when cycled at a current density of 200Â mAgâ1. Further when the sample is cycled at a high current density of 500Â mAgâ1 the composite sample shows a stable capacity of 400 mAhgâ1 for 100 cycles which is attributed to the complete transition of MWCNT to GNSs as confirmed from the high resolution transmission electron microscope (HRTEM) images. First principles density functional theory calculations have been carried out to validate possibility of this morphological transition upon Li intercalation and the results agree well with the experimental findings.
In-situ morphology transition from multiwall carbon nanotubes (MWCNT) to graphene nanosheets (GNS) upon Li intercalation causes huge increase in capacity of more than 50% for SnO2/MWCNT composites anode during cycling in Lithium ion battery.277
Journal: Electrochimica Acta - Volume 231, 20 March 2017, Pages 255-263