Fabrication of LiFePO 4/carbon composites by glass powder crystallization processing and their battery performance
Abstract
The glass powder crystallization processing is proposed to fabricate LiFePO 4/carbon composites, in which the mixture of glass (33.3Li 2O-33.3Fe 2O 3-33.3P 2O 5) powders and glucose or graphite was heat-treated at 560 800 °C in a nitrogen atmosphere. It is confirmed from an X-ray diffraction analysis and Raman scattering spectrum measurements that the glass crystallization is taking place together with the reduction of Fe 3+ to Fe 2+ and LiFePO 4/carbon composites showing electrical conductivities of 10 -3 Scm - 1 are formed. The LiFePO 4 glass-ceramics shows the voltage of 3.5 V and capacity of 95 mAh/g. It is proposed that this new simple process has a potential for the fabrication of LiFePO 4/carbon composites.
- Publication:
-
Journal of Non Crystalline Solids
- Pub Date:
- December 2010
- DOI:
- 10.1016/j.jnoncrysol.2010.05.079
- Bibcode:
- 2010JNCS..356.3032H