Co-synthesis of LiFePO4 and Carbon Nanotubes
The rate capabilities of LiFePO{sub 4} composites are dependent on the structure of the carbon that coats the powders, formed during co-calcination with carbon containing precursors. The addition of readily decomposed pyromellitic acid and graphitization catalysts such as ferrocene during synthesis results in coatings with low D/G (disordered/graphene) ratios, while maintaining the carbon content of the powders below 2 wt. %. This is important to avoid adversely affecting the tap density. The good correlation between the pressed pellet conductivities of the LiFePO{sub 4}/C composites and their rate capability in lithium cells is further confirmation of the importance of the carbon structure, because graphitic carbons generally have higher conductivities than disordered ones.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- DE-AC02-05CH11231
- OSTI ID:
- 918673
- Report Number(s):
- LBNL-62998-Ext.-Abs.; R&D Project: 500302; BnR: VT0301030; TRN: US200819%%397
- Resource Relation:
- Conference: Joint International Meeting of theElectrochemical Society (ECS) and Sociedad Iberoamericana deElectroquimica, Cancun, Mexico, Oct 29, 2006-Nov 5,2006
- Country of Publication:
- United States
- Language:
- English
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