High Rate Capability of a Dual-Porosity LiFePO4/C Composite

Sinha, Nupur Nikkan and Shivakumara, C and Munichandraiah, N (2010) High Rate Capability of a Dual-Porosity LiFePO4/C Composite. In: ACS Applied Materials & Interfaces, 2 (7). pp. 2031-2038.

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Abstract

Mesoporous intercalation compounds consisting of two differentdistributions of pores represent a potentially attractive material for high-rate cathodes. A mesoporous LiFePO4/C composite with two sizes of pores is prepared for the first time via a solution-based polymer templating technique. The precursor of the LiFePO4/C composite is heated at different temperatures in the range from 600 to 800 degrees C to study the effect of crystallinity, porosity, and morphology on the electrochemical performance. The composite is found to attain reduction in the surface area, carbon content, and porosity upon increasing temperature. Nonetheless, the composite prepared at 700 degrees C with pore-size distributions of around 4 and 50 nm exhibits a high rate capability and stable capacity retention upon cycling.

Item Type:	Journal Article
Publication:	ACS Applied Materials & Interfaces
Publisher:	American Chemical Society
Additional Information:	Copyright of this article belongs to American Chemical Society.
Keywords:	cathode material;Li-ion battery;mesoprous material;high rate capability
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	25 Aug 2010 05:32
Last Modified:	19 Sep 2010 06:14
URI:	http://eprints.iisc.ac.in/id/eprint/31357

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