Effect of cathode slurry composition on the electrochemical properties of Li-ion batteries

DERMENCİ K. B., TURAN S., Behm M., Lindbergh G.

Symposium on Lithium-Ion Batteries and Beyond - 227th ECS Meeting, Illinois, United States Of America, 24 - 28 May 2015, vol.66, pp.285-293 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 66
  • Doi Number: 10.1149/06609.0285ecst
  • City: Illinois
  • Country: United States Of America
  • Page Numbers: pp.285-293
  • Anadolu University Affiliated: Yes


© The Electrochemical Society.The performance difference between commercial and laboratory scale cells remains a problem to be solved. Different way of battery electrode preparation is considered to be the main reason underlying various battery performance. In this work, the effect of slurry composition on electrochemical properties of Li-ion batteries is reported. Slurry preparation with various compositions of LiFePO4 active material (76-88%), PVdF binder (6-12%) and Super P Carbon conductive additive (6-12%) has been studied. Charge-discharge curves and capacity fade of electrodes are also investigated. Selected electrodes were pressed in order to see the effect of pressing on the final performance. Results showed that varying PVdF and carbon content mainly effects charge-discharge characteristics. For unpressed samples, higher amount of PVdF and carbon could result higher maximum specific capacity and lower internal resistance during lithiation and delithiation of positive electrode. Pressing reduces the distance between slurry particles, which enhances the conductivity of the prepared cell.