Mun, Junyoung Park, Jin-Hwan Choi, Wonchang Benayad, Anass Park, Jun-Ho Lee, Jae-Myung Doo, Seok-Gwang Oh, Seung M. 2024-01-20T08:04:40Z 2024-01-20T08:04:40Z 2021-09-05 2014-12 2050-7488 https://pubs.kist.re.kr/handle/201004/126036 Carbon serves as one of the best coating materials for the cathode in lithium ion batteries. This is because it can solve two main problems, which are surface deterioration and poor electrical conductivity. However, the conventional carbon coating procedures and, chemical carbonization processes, are especially difficult to implement for the oxide cathode, which could thereby deteriorate the oxide structure. We prepared a new dry 100 nm-thick homogeneous multi-walled carbon nanotube (MWCNT) coating on the high-capacity oxide cathode material, Li1.17Ni0.17Co0.1Mn0.56O2, by applying shear stress without breaking down the crystal structure or morphology of the cathode. The electronic conductivity of the carbon composite with the coated sample is 170 mS cm(-1), which is over 40 times as much as the conductivity of the pristine cathode containing the same amount of carbon. In addition, at a high current condition of 2450 mA g(-1), a specific capacity of 103 mA h g(-1) is observed even with 3 percent of the carbon (in weight) constituting the coated MWCNT. The unconventionally improved performances are explained by the suppression of the electronic resistance and surface charge transfer resistance by electrochemical analyses. English ROYAL SOC CHEMISTRY HIGH-CAPACITY ELECTRODE MATERIALS SURFACE KINETICS New dry carbon nanotube coating of over-lithiated layered oxide cathode for lithium ion batteries Article 10.1039/c4ta04818k 1 JOURNAL OF MATERIALS CHEMISTRY A, v.2, no.46, pp.19670 - 19677 JOURNAL OF MATERIALS CHEMISTRY A 2 46 19670 19677 scie scopus 000344598700015 2-s2.0-84908648292 Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Chemistry Energy & Fuels Materials Science Article HIGH-CAPACITY ELECTRODE MATERIALS SURFACE KINETICS cathode lithium ion batteries carbon overlithiated layered oxides