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The improvement on capacity retention of silicon/graphite composites with TiN additive as anode materials for Li-ion battery
- Source :
-
Journal of Materials Processing Technology . Nov2008, Vol. 208 Issue 1-3, p35-41. 7p. - Publication Year :
- 2008
-
Abstract
- Abstract: Silicon (Si) exhibits promising prospects due to its largest capacity among all known anode materials of lithium ion batteries. Carbon-coated silicon/graphite composites with titanium nitride (TiN) additives were synthesized from pyrolyzing phenolic resin. Pyrolyzed carbon acts as a mechanical and electrochemical buffer that enhances cycling performance and the morphology of composites. In addition, inactive TiN serves as a buffer matrix that efficiently prevents Si from cracking during the charging/discharging process and enhances the electrochemical properties of composites. Optimal composition of the composite, 45wt.% phenolic resin, 25wt.% graphite, 10wt.% silicon and 20wt.% TiN, exhibits a charging capacity about 650mAh/g in the first cycling test and 443mAh/g after seven cycling tests and maintains a higher coulombic efficiency. [Copyright &y& Elsevier]
- Subjects :
- *NATIVE element minerals
*TITANIUM nitride
*SILICON
*SYNTHETIC gums & resins
Subjects
Details
- Language :
- English
- ISSN :
- 09240136
- Volume :
- 208
- Issue :
- 1-3
- Database :
- Academic Search Index
- Journal :
- Journal of Materials Processing Technology
- Publication Type :
- Academic Journal
- Accession number :
- 34532885
- Full Text :
- https://doi.org/10.1016/j.jmatprotec.2007.12.096