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Single-Crystalline LiFePO4 Nanosheets for High-Rate Lithium Batteries

Monday, 6 October 2014: 17:30
Sunrise, 2nd Floor, Star Ballroom 5 (Moon Palace Resort)
G. Yu (Texas Materials Institute, The University of Texas at Austin), Y. Zhao, and L. Peng (UT-Austin, Texas Materials Institute)
The lithiation/delithiation in LiFePO4 is highly anisotropic with lithium ion diffusion being mainly confined to channels along the b-axis. Controlling the morphology and crystal orientation of LiFePO4 material therefore plays an important role for efficient mass and change transport within this material. We will present our recent effort on the preparation of single crystalline LiFePO4 nanosheets with a large percentage of highly oriented {010} facets, which provide the highest pore density for lithium ion insertion/extraction. The LiFePO4 nanosheets show a high specific capacity at low charge/discharge rates, and retain significant capacities at high C-rates, which may benefit the development of lithium batteries with both favorable energy and power density.