Electrochemical properties of lithium iron phosphate cathode material using polymer electrolyte
Carbon-coated lithium iron phosphate (LiFePO4/C) cathode material was synthesized by mechano-chemical activation method. The performance of LiFePO4/C in lithium battery was tested with an electrospun polymer-based electrolyte. Liquid electrolyte of 1M lithium hexafluorophosphate (LiPF6) in ethylene carbonate/dimethyl carbonate (EC/DMC) (1:1vol) was incorporated in electrospun poly (vinylidene fluoride-co-hexafluoropropylene) (P (VdF-HFP)) microfibrous membrane to prepare the polymer electrolyte (PE). The cell based on Li|PE|LiFePO4/C exhibited an initial discharge capacity of 142mAhg-1 at 0.1C-rate at room temperature. Good cycling performance even under the high current density of 2C could be obtained. Impedance spectroscopy was applied to investigate the material behavior during 0.1C-rate charge-discharge cycling. When the flesh cell and the cell after different cycles were compared, impedance resistance was found to decrease with cycling. Impedance study indicated good cycle life for the cell when tested at room temperature.
Jae-Kwang Kim Jae-Won Choi Gouri Cheruvally Yong-Jo Shin Jou-Hyeon Ahn Kwon-Koo Cho Hyo-Jun Ahn Ki-Won Kim
Department of Chemical and Biological Engineering and Engineering Research Institute, Gyeongsang Nat School of Nano and Advanced Materials Engineering and Engineering Research Institute, Gyeongsang Nat
国际会议
第二届功能原料国际研讨会(The 2rd International Symposium on Functional Materials)
杭州
英文
66-69
2007-05-16（万方平台首次上网日期，不代表论文的发表时间）