American Chemical Society
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Single-Crystalline LiFePO4 Nanosheets for High-Rate Li-Ion Batteries

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journal contribution
posted on 2014-05-14, 00:00 authored by Yu Zhao, Lele Peng, Borui Liu, Guihua Yu
The lithiation/delithiation in LiFePO4 is highly anisotropic with lithium-ion diffusion being mainly confined to channels along the b-axis. Controlling the orientation of LiFePO4 crystals therefore plays an important role for efficient mass transport within this material. We report here 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.