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Electrochemical Properties of LiFePO 4 Cathodes: The Effect of Carbon Additives.
- Source :
- Batteries; Sep2022, Vol. 8 Issue 9, p111-111, 13p
- Publication Year :
- 2022
-
Abstract
- The influence of different conductive additives (carbon nanofibers (CNFs), carbon nanoplatelets, and pyrolytic carbon from sucrose (Sucr) or polyvinylidene fluoride) on the morphology, electron conductivity, and electrochemical performance of LiFePO<subscript>4</subscript>-based cathodes was investigated to develop the most efficient strategy for the fabrication of high-rate cathodes. Pyrolytic carbon effectively prevents the growth of LiFePO<subscript>4</subscript> grains and provides contact between them, CNFs provide fast long-range conductive pathways, while carbon nanoplatelets can be embedded in carbon coatings as high-conductive "points" which enhance the rate capability and decrease the capacity fading of LFP. The LiFePO<subscript>4</subscript>/C<subscript>Sucr</subscript>/CNF showed better performance than the other cathodes due to the synergy of the high-conductive CNF network (the electronic conductivity was 1.3 × 10<superscript>−2</superscript> S/cm) and the shorter Li<superscript>+</superscript> ion path (the lithium-ion diffusion coefficient was 2.1 × 10<superscript>−11</superscript> cm<superscript>2</superscript>/s). It is shown that the formation of composites based on LFP and carbon nanomaterials via mortar grinding is a more promising strategy for electrode material manufacturing than ball milling. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 23130105
- Volume :
- 8
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- Batteries
- Publication Type :
- Academic Journal
- Accession number :
- 159274288
- Full Text :
- https://doi.org/10.3390/batteries8090111