Park, Jeongeun Lee, Seunghak Kim, Minjun Seok, Eunjeong Park, Dohyub Lim, Hyojun Kim, Hyung-Seok Jung, Heechul Choi, Wonchang 2024-01-19T11:30:43Z 2024-01-19T11:30:43Z 2022-06-23 2022-09 0363-907X https://pubs.kist.re.kr/handle/201004/114752 The formation of Li4SiO4 (LSO) coating layer on LiNi0.88Co0.05Mn0.07O2 (LNCM) was achieved by incorporating a new tetraethyl orthosilicate (TEOS)-dropping coating method. This concept includes the hydrolysis reaction of TEOS on the surface of Ni0.88Co0.05Mn0.07(OH)(2) and the subsequent calcination process with lithium source to obtain LSO-coated LNCM cathode materials successfully during the calcination process. This method provides the driving force for the formation of a more uniform and thin coating layer compared with the traditional wet-chemical coating method. The bare LNCM and LSO-coated LNCM showed similar capacity retention rates during room temperature (25 degrees C) cycling, but the capacity retention of LSO-LNCM (81.6% after 100 cycles) for the cycling test at elevated temperature was significantly increased compared with bare LNCM (63.69% after 100 cycles). Additionally, the Li-ion accessibility of the coated LNCM electrode was improved by the existence of the Li-containing coating materials, and the results of analysis by the galvanostatic intermittent titration technique (GITT) confirmed the better Li-ion diffusivity of the coated sample. These results indicate the high possibility of this novel coating method for application in various materials for developing secondary batteries. English John Wiley & Sons Inc. Design of a hydrolysis-supported coating layer on the surface of Ni-rich cathodes in secondary batteries Article 10.1002/er.8203 1 International Journal of Energy Research, v.46, no.11, pp.15027 - 15042 International Journal of Energy Research 46 11 15027 15042 N scie scopus 000807935400001 Energy & Fuels Nuclear Science & Technology Energy & Fuels Nuclear Science & Technology Article HIGH-RATE CAPABILITY ELECTROCHEMICAL PERFORMANCE LINI0.8CO0.1MN0.1O2 CATHODE CHEMICAL DIFFUSION KINETIC-PARAMETERS LITHIUM LICOO2 STABILITY DENSITY OXIDE coating high-Ni cathode hydrolysis Li-ion batteries lithium silicate surface modification