Kim, Ji-Young Kim, Sang Hoon Kim, Dong Hyun Susanto, Dieky Kim, Se Young Chang, Won-Young Cho, Byung Won Yoon, Won-Sub Bak, Seong Min Yang, Xiao Qing Nam, Kyung Wan Chung, Kyung Yoon 2024-01-20T01:33:00Z 2024-01-20T01:33:00Z 2021-09-01 2017-05 0021-891X https://pubs.kist.re.kr/handle/201004/122785 The electronic structures of bare and ZrO2-coated Li(Ni0.8Co0.15Al0.05)O-2 electrode systems were investigated using a combination of time-resolved X-ray diffraction and soft X-ray absorption spectroscopy (XAS) techniques. The ZrO2 coating on the surface of Li(Ni0.8Co0.15Al0.05)O-2 was effective in elevating the onset temperature of the dissociation of charged Li-0.33(Ni0.8Co0.15Al0.05)O-2, which will enhance the safety of Li-ion cells. Soft XAS spectra of the Ni L-II,L-III-edge in the partial electron yield mode were obtained, which showed that the enhanced electrochemical properties and thermal stability of the cathode materials by ZrO2 coating can be attributed to the suppression of unwanted Ni oxidation state changes at the surface. The electronic structural effects of a ZrO2 coating on Li(Ni0.8Co0.15Al0.05)O-2 were examined by soft X-ray absorption spectroscopy. The coating stabilized the Ni oxidation state at the electrode surface against decomposition. [GRAPHICS] . English SPRINGER X-RAY-ABSORPTION NICKEL-OXIDE DERIVATIVES TIME-RESOLVED XRD IN-SITU XRD LI-ION CATHODE MATERIALS CYCLING PERFORMANCE CAPACITY RETENTION SPECTROSCOPY LICOO2 Electronic structural studies on the improved thermal stability of Li(Ni0.8Co0.15Al0.05)O-2 by ZrO2 coating for lithium ion batteries Article 10.1007/s10800-017-1062-5 1 JOURNAL OF APPLIED ELECTROCHEMISTRY, v.47, no.5, pp.565 - 572 JOURNAL OF APPLIED ELECTROCHEMISTRY 47 5 565 572 scie scopus 000399894700001 2-s2.0-85015806861 Electrochemistry Electrochemistry Article X-RAY-ABSORPTION NICKEL-OXIDE DERIVATIVES TIME-RESOLVED XRD IN-SITU XRD LI-ION CATHODE MATERIALS CYCLING PERFORMANCE CAPACITY RETENTION SPECTROSCOPY LICOO2 Li(Ni0.8Co0.15Al0.05)O-2 ZrO2 coating Thermal stability Soft X-ray absorption spectroscopy (XAS) Batteries