The Role of AlF3 Coatings in Improving Electrochemical Cycling of Li‐Enriched Nickel‐Manganese Oxide Electrodes for Li‐Ion Batteries

• DOI: 10.1002/adma.201104106
• Publication Date: 2012-02-24T11:12:45Z
• Authors: Yang‐Kook Sun; Min‐Joon Lee; Chong S. Yoon; Jusef Hassoun; Khalil Amine; Bruno Scrosati
• Keywords: Manganese; Surface Properties; Oxides; Lithium; 01 natural sciences; 7. Clean energy; 0104 chemical sciences; Fluorides; Electric Power Supplies; AlF ; 3; coatings; cathode materials; electrochemical cycling; lithium batteries;; Nickel; Aluminum Compounds; Electrodes

A Li[Li(0.19)Ni(0.16)Co(0.08)Mn(0.57)]O(2) cathode was coated with AlF(3) on the surface. The AlF(3)-coating enhanced the overall electrochemical characteristics of the electrode while overcoming the typical shortcomings of lithium-enriched cathodes. This improvement was attributed to the transformation of the initial electrode layer to a spinel phase, induced by the Li chemical leaching effect of the AlF(3) coating layer.