Effect of cathode slurry composition on the electrochemical properties of Li-ion batteries
2015 (English)In: ECS Transactions, ISSN 1938-5862, E-ISSN 1938-6737, Vol. 66, no 9, 285-293 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2015. Vol. 66, no 9, 285-293 p.
Electric batteries; Electric discharges; Electrochemical properties; Electrodes; Ions; Lithium; Lithium alloys; Lithium compounds; Secondary batteries, Battery performance; Charge discharge curves; Charge-discharge characteristics; Conductive additives; Effect of cathode; Internal resistance; Positive electrodes; Specific capacities, Lithium-ion batteries
IdentifiersURN: urn:nbn:se:kth:diva-174659DOI: 10.1149/06609.0285ecstScopusID: 2-s2.0-84940372228OAI: oai:DiVA.org:kth-174659DiVA: diva2:871676
QC 201511162015-11-162015-10-072015-11-16Bibliographically approved