Study of lithiated Nafion ionomer for lithium batteries

H. -Y. Liang; X. -P. Qiu; S. -C. Zhang; W. -T. Zhu; L. -Q. Chen
December 2004
Journal of Applied Electrochemistry;Dec2004, Vol. 34 Issue 12, p1211
Academic Journal
Lithiated Nafion 112 ionomer was characterized by FT-IR spectroscopy, AC impedance, and cyclic voltammetry. The ionomer swollen with mixed solvents of propylene carbonate (PC) and ethylene carbonate shows ionic conductivity of 8.18×10-5Scm-1 at 25°C and good electrochemical stability to allow operation in Li/ionomer/LiCoO2 cells. The discharge capacity of the first cycle is 126mAhg-1. Significant capacity loss occurs during cycling due to the presence of PC. AC impedance shows that the passive layer formed at the Li/ionomer interface dominates the cycling performance of the cell.


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