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Applying Analytical Methods for Face Dependent Studies of LiCoO2

Monday, 20 June 2016
Riverside Center (Hyatt Regency)
L. E. Slaymaker (University of Wisconsin-Madison), D. H. K. Jackson, T. F. Kuech (University of Wisconsin - Madison), and R. J. Hamers (University of Wisconsin-Madison)
Surface reactions of electrode materials with electrolyte can be severely detrimental to performance and lifetime of a battery material. Coatings, such as Al2O3, facilitate lithium conduction and block electrolyte degradation. However, the mechanisms controlling how these coatings interact with the cathode surface and improve battery performance are not well understood. The role of the exposed crystal face of cathode materials may have a major impact on the ability of the coating material to bind with the cathode surface. By evaluating the effectiveness of coatings at different crystal planes, we can gain a better understanding of the surface reactivity of cathode materials such as LiCoO2. To accomplish this, we are investigating coating the surface of single crystal LiCoO2 with coating materials such as Al­2O3 and determining the amount of coating present on an edge or basal plane using XPS. We are extending this knowledge to future coating design to selectivity coat the LiCoO2 surface to improve battery performance.