Effect of Li Source on Charge/Discharge Performance of LiFePO₄

Abstract:

LiFePO₄ has been considered as the most promising positive electrode due to its low cost, high theoretical capacity, stability and low toxicity, all highly required in vehicle applications. In this work, LiFePO₄ compound was synthesized by the solid carbothermic reduction reactions with different Li resource. The pure LiFePO4 phase was confirmed for all samples by analysis of the XRD results. The different morphologies were obtained due to different Li resources. The potential plateau of all samples is in the range from 3V to 4V. The sample (LiCO₃ as the Li resource) has a higher discharge capacity of 118mAhg⁻¹ at 0.2C 20% greater than that of the sample (LiOH as the Li resource). The reason comes maybe from nano pore characteristics, which reduce Li ion diffusion distance, and increase the utilization efficiency of material.

• Periodical: Advanced Materials Research (Volume 509)
• Pages: 51-55
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.509.51
• Online since: April 2012
• Authors: Hong Quan Liu, Fei Xiang Hao, Yi Jie Gu, Yun Bo Chen
• Keywords: Cathode Material, Li Resource, LiFePO₄, Lithium-Ion Battery

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