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Effect of cathode slurry composition on the electrochemical properties of Li-ion batteries
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Applied Electrochemistry.ORCID iD: 0000-0002-9392-9059
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Applied Electrochemistry.ORCID iD: 0000-0001-9203-9313
2015 (English)In: ECS Transactions, ISSN 1938-5862, E-ISSN 1938-6737, Vol. 66, no 9, 285-293 p.Article in journal (Refereed) Published
Abstract [en]

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.
Keyword [en]
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
National Category
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-174659DOI: 10.1149/06609.0285ecstScopus ID: 2-s2.0-84940372228OAI: oai:DiVA.org:kth-174659DiVA: diva2:871676
Note

QC 20151116

Available from: 2015-11-16 Created: 2015-10-07 Last updated: 2017-12-01Bibliographically approved

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Behm, MårtenLindbergh, Göran

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