Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7737687 | Journal of Power Sources | 2014 | 6 Pages |
Abstract
We report heat capacity, thermogravimetry and thermal diffusivity data for carbonized mesophase pitch coated LiFePO4 (LFP) cathodes. The results are compared with the thermophysical properties of a conventional LFP-based electrode having a poly (vinylene) difluoride (PVDF) binder and conductive carbon diluents. The measured heat capacity of LFP as a function of temperature is in good agreement with model calculations based on first-principles methods. Thermal diffusivity data indicate that the mesophase pitch coated LFP compositions have a factor of two higher thermal diffusivity than the conventional electrode composition, suggesting that the coatings improve heat transfer. In the presence of an electrolyte mixture (1.2Â M lithium hexa-fluorophosphate), differential scanning calorimetry (DSC) analysis of the LFP-pitch composite and LFP-PVDF-carbon composites showed similar onset temperature and heat evolution.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Jagjit Nanda, Surendra K. Martha, Wallace D. Porter, Hsin Wang, Nancy J. Dudney, Maxwell D. Radin, Donald J. Siegel,