Back to Search
Start Over
Nitrogen-doped 3D macroporous graphene frameworks as anode for high performance lithium-ion batteries.
- Source :
-
Journal of Power Sources . Oct2015, Vol. 293, p799-805. 7p. - Publication Year :
- 2015
-
Abstract
- Nitrogen-doped 3D graphene frameworks (N-3D GFs) were synthesized by a facile two-step method: Polystyrene (PS) encapsulated in graphene oxide (GO) composites (denoted as PS@GO) are first synthesized, followed by a post–thermal annealing in ammonia step to get N-doped 3D GFs. The resulting N-3D GFs inherit the advantages of graphene, which possesses high electrical conductivity and high specific surface area. Furthermore, the well-defined 3D interconnected structure can facilitate the access of the electrolyte to the electrode surface, thus shortening the diffusion length of both Li + /e − , keeping the overall electrode highly conductive and active in lithium storage. Simultaneously, the in-situ formation of pyridinic N and pyrrolic N in 3D GFs provide high electronic conductivity and structure stability for lithium storage. The designed N-3D GFs electrode delivers a high specific capacity of 1094 mAhg −1 after 100 cycles at 200 mAg −1 and superior rate capability (691 mAhg −1 after 500 cycles at 1000 mAg −1 ) when used as anode for LIBs. We believe that such an inherently inexpensive, scalable, facile method can significantly increase the feasibility of building high performance energy storage system. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03787753
- Volume :
- 293
- Database :
- Academic Search Index
- Journal :
- Journal of Power Sources
- Publication Type :
- Academic Journal
- Accession number :
- 103654015
- Full Text :
- https://doi.org/10.1016/j.jpowsour.2015.05.074