Electrostatic interaction-driven inorganic coating layer toward improving battery performance for 5 V class high-voltage cathode in secondary batteries

Authors
Seok, EunjeongKim, MinjunLee, SeunghakPark, JeongeunKu, MinkyeongLIM HYOJUNLee, YongheumYu, SeunghoChoi, Wonchang
Issue Date
2023-02
Publisher
Elsevier BV
Citation
Chemical Engineering Journal, v.453
Abstract
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.
Keywords
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
ISSN
1385-8947
URI
https://pubs.kist.re.kr/handle/201004/75834
DOI
10.1016/j.cej.2022.139737
Appears in Collections:
KIST Article > 2023
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