Depolarization of Lithium Iron Phosphate Batteries by Multi-Walled Carbon Nanotube/Graphite Double-Layer Anode

Abstract

Polarization of lithium iron phosphate-graphite batteries greatly affects its quality and life. In order to reduce the electrode polarization, the multi-walled carbon nanotubes/graphite double-layer anode was proposed to improve the performance of the battery, and the depolarization of the graphite anode electrode interface was studied. For the study of depolarization the electrode materials were characterized by scanning electron microscopy, XRD powder diffraction, cyclic voltammetry and AC impedance. The effect of double-layer anode on the charge and discharge of lithium batteries was also discussed. The results show that the discharge capacity increased by nearly two times by the conductive network.