Seok, Eunjeong Kim, Minjun Lee, Seunghak Park, Jeongeun Ku, Minkyeong LIM HYOJUN Lee, Yongheum Yu, Seungho Choi, Wonchang 2024-01-12T02:32:58Z 2024-01-12T02:32:58Z 2022-11-23 2023-02 1385-8947 https://pubs.kist.re.kr/handle/201004/75834 One of the most promising high voltage cathode materials for application in lithium ion batteries (LIBs), the 5 V spinel LiNi0.5Mn1.5O4, faces electrode/electrolyte decomposition at high voltage, rendering commercial application difficult. To overcome these obstacles, this study proposes a method for adsorbing vanadium anion complexes on the surface of Ni0.25Mn0.75(OH)2 using cationic polymers and calcination them with LiOH to form LiNi0.5Mn1.5O4 with a uniform nano-Li3VO4 coating layer. The uniform nano-Li3VO4 coating layer prepared by the above method promotes transfer of lithium ions and protects active material from electrolyte corrosion, thereby obtaining a particularly stable electrochemical performance under severe operating conditions such as high temperatures. Electrochemical tests show that the Li3VO4-coated LiNi0.5Mn1.5O4 demonstrates a high discharge capacity and at the cycling test after storage test at 60 °C, the Li3VO4-coated LiNi0.5Mn1.5O4 shows higher capacity retention than pristine LiNi0.5Mn1.5O4; this can be attributed to the coating that acts as a protective layer. English Elsevier BV Electrostatic interaction-driven inorganic coating layer toward improving battery performance for 5 V class high-voltage cathode in secondary batteries Article 10.1016/j.cej.2022.139737 1 Chemical Engineering Journal, v.453 Chemical Engineering Journal 453 N scie scopus 000891640900002 Engineering, Environmental Engineering, Chemical Engineering Article LITHIUM-ION BATTERIES HIGH-ENERGY-DENSITY ELECTROCHEMICAL PROPERTIES LINI0.5MN1.5O4 CATHODE COATED LINI0.5MN1.5O4 SPINEL CATHODES MN3+ CONTENT CAPACITY LIMN1.5NI0.5O4 STABILITY Li3VO4 Surface-modification Electrostatic interaction Li-ion batteries High voltage cathode