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Electrochemical Studies of Carbon Nanotube-LiFePO4 Nanocomposite Cathode for High-Capacity Lithium-Ion Batteries

Tuesday, 21 June 2016
Riverside Center (Hyatt Regency)
X. Sun (ECE Depart, University of Waterloo), K. Feng, Z. Chen (Chem Eng Depart, University of Waterloo), and B. Cui (ECE Department, University of Waterloo)
LiFePO4 nanoparticles were incorporated with multi-walled carbon nanotubes (CNTs) via a facile one-step polyol process at low temperature. CNTs were uniformly embedded into LiFePO4 particles and formed a conductive network to enhance the electrochemical performance of the CNT-LiFePO4 nanocomposite cathode. Structural composition and morphology of the composite were investigated in details by X-ray diffraction (XRD), scanning and transmission electron microscopies (SEM, TEM). The electrochemical properties were analyzed in the voltage of 2.0 and 4.0 V by charge/discharge testing and cyclic voltammetry. Primary experimental results showed that these CNT-LiFePO4 nanocomposite cathodes exhibited enhanced electrochemical performance with both high capacity and good reversibility which has been clearly demonstrated in the Fig. 1.