Back to Search
Start Over
Macroporous Fe3O4/Carbon Composite Microspheres with a Short Li+ Diffusion Pathway for the Fast Charge/Discharge of Lithium Ion Batteries.
- Source :
-
Chemistry - A European Journal . Aug2014, Vol. 20 Issue 35, p11078-11083. 6p. - Publication Year :
- 2014
-
Abstract
- Macroporous Fe3O4/carbon composite and core-shell Fe3O4@carbon composite microspheres have been prepared by means of one-pot spray pyrolysis. The addition of polystyrene (PS) nanobeads to a spray solution containing an iron salt and poly(vinylpyrrolidone) (PVP) led to macroporous Fe3O4/carbon composite microspheres, the carbon and iron components of which are uniformly distributed over the entire composite microsphere. The pore-size distribution curve for the macroporous Fe3O4/carbon composite shows distinct peaks at around 10 and 80 nm. An electrode prepared from the macroporous Fe3O4/carbon composite microspheres showed better cycling and rate performances than an electrode formed from core-shell Fe3O4@carbon composite microspheres. The initial discharge and charge capacities of the macroporous Fe3O4/carbon composite microsphere electrode were determined to be 1258 and 908 mA h g−1 at 2 A g−1, respectively, and the corresponding initial coulombic efficiency was 72 %. The composite microsphere electrode cycled 500 times at 5 A g−1 showed a high discharge capacity of 733 mA h g−1. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09476539
- Volume :
- 20
- Issue :
- 35
- Database :
- Academic Search Index
- Journal :
- Chemistry - A European Journal
- Publication Type :
- Academic Journal
- Accession number :
- 97581307
- Full Text :
- https://doi.org/10.1002/chem.201402359