title: The synergistic effect of inert oxide and metal fluoride dual coatings on advanced cathode materials for lithium ion battery applications.
abstract: The effect of Al2O3/LiF dual coatings on the electrochemical performance of over-lithiated layered oxide (OLO) has been investigated. A uniform coating of Al2O3 and LiF is obtained on the surface of the layered pristine material. The OLO with a dual Al2O3/LiF coating with a ratio of 1 : 1.5 exhibits excellent electrochemical performance. An initial discharge capacity of 265.66 mA h g(-1) is obtained at a C-rate of 0.1C. This capacity is approximately 15 mA h g(-1) higher than that of pristine OLO. The capacity retention (92.8% at the 50th cycle) is also comparable to that of pristine OLO (91.4% at the 50th cycle). Coating the cathode with a dual layer comprising Al2O3 and LiF leads to improved charging and discharging kinetics, and prevents direct contact between the cathode and the electrolyte.
authors.affiliation: Energy Lab, Samsung Advanced Institute of Technology SAIT, Electronic Materials Research Complex, 130 Samsung-ro, Gyeonggi-do, 16678, Republic of Korea. ydmj79@gmail.com ydmj79.park@samsung.com bs6002.lee@samsung.com junho11.park@samsung.com sukgihong@naver.com.
authors.forename: Kwangjin
authors.initials: K
authors.lastname: Park
authors.forename: Byoung-Sun
authors.initials: BS
authors.lastname: Lee
authors.forename: Jun-Ho
authors.initials: JH
authors.lastname: Park
authors.forename: Suk-Gi
authors.initials: SG
authors.lastname: Hong