Modification of Li[Li0.13Ni0.2Mn0.47Co0.2]O2 cathode material by layered CeO2–C coating

• Published in: Journal of solid state electrochemistry Vol. 23; no. 2; pp. 433 - 439
• Main Authors: Kurilenko, K. A., Shlyakhtin, O. A., Petukhov, D. I., Garshev, A. V., Valeev, R. G.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 12.02.2019; Springer Nature B.V
• Subjects: Analytical Chemistry; Carbon; Cathodes; Cerium nitrate; Cerium oxides; Characterization and Evaluation of Materials; Charge transfer; Chemistry; Chemistry and Materials Science; Coated electrodes; Coating effects; Condensed Matter Physics; Electrochemistry; Electrode materials; Electrode polarization; Energy Storage; Original Paper; Physical Chemistry; Polystyrene resins; Pyrolysis; Thermal decomposition; Transmission electron microscopy; Pyrolytic carbon; Cathode materials; Coatings; Li-ion batteries; Ceria
• ISSN: 1432-8488; 1433-0768
• DOI: 10.1007/s10008-018-4150-5

Li[Li 0.13 Ni 0.2 Mn 0.47 Co 0.2 ]O 2 (LLNMC) cathode materials coated with CeO 2 and pyrolytic carbon have been obtained by the consecutive thermal decomposition of Ce(NO 3 ) 3 and polystyrene at the surface of LLNMC powder. EDX analysis combined with transmission electron microscopy revealed the uniform coating of LLNMC grains with nanosized ceria particles. The XPS spectra of LLNMC coated with CeO 2 and carbon indicated a considerable amount of –С=С– bonds in the carbonized polystyrene pyrolysis products. The layered CeO 2 –C coating promotes a decrease in the electrode polarization and the charge transfer resistance of LLNMC during cycling, thus promoting a better rate capability of the cathode material. A combined effect of the CeO 2 and carbon coatings results in the increase of the electrochemical capacity of LLNMC to 220 mAh g −1 at C/10.