Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 39, Pages 21890-21897Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b06377
Keywords
SnxSb-graphene-carbon porous multichannel nanofibers; flexible mats; binder free electrodes; good electrical performance; lithium-ion batteries
Funding
- National Natural Science Foundation of China [51404103, 51574117, 61376073, 21103046]
- Fundamental Research Funds for the Central Universities
- Hunan Provincial Natural Science Foundation of China [11JJ7004, 14JJ3067]
Ask authors/readers for more resources
SnxSb interrnetallic composites as high theoretical capacities anodes for lithium ion batteries (LIBs) suffer from the quick capacity fading owing to their huge volume change. In this study, flexible mats made up of SnxSb-graphene-carbon porous multichannel nanofibers are fabricated by an electrospinning method and succedent annealing treatment at 700 degrees C. The flexible mats as binder-free anodes show a specific capacity of 729 mA h/g in the SOOth cycle at a current density of 0.1 A/g, which is much higher than those of graphene-carbon nanofibers, pure carbon nanofibers, and SnxSb-graphene-carbon nanofibers at the same cycle. The flexible mats could provide a reversible capacity of 381 mA h/g at 2 A/g, also higher than those of nanofibers, graphene-carbon nanofibers, and SnxSb-carbon nanofibers. It is found that the suitable nanochannels could accommodate the volume expansion to achieve a high specific capacity. Besides, the graphene serves as both conductive and mechanical-property additives to enhance the rate capacity and flexibility of the mats. The electrospinning technique combined with graphene modification may be an effective method to produce flexible electrodes for fuel cells, lithium ion batteries, and super capacitors.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available