Lee, Hyesu Jo, Eunmi Chung, Kyung Yoon Byun, Dongjin Kim, Seung Min Chang, Wonyoung 2024-01-19T18:03:45Z 2024-01-19T18:03:45Z 2021-09-05 2020-02-03 1433-7851 https://pubs.kist.re.kr/handle/201004/118972 The structural stability of cathode materials during electrochemical reactions, in particular, under high-rate discharge, is pertinent to the design and development of new electrode materials. This study investigates the structural inhomogeneity that develops within a single LiNi0.835Co0.15Al0.015O2 (NCA83) particle during a fast discharging process under different cutoff voltages. Some of the NCA83 particles discharged from a high cutoff voltage (4.8 V) developed surface areas in which the layered structure was recovered, although the interiors retained the degraded spinel structure. These micro- and nano-scale structural inversions from high cutoff voltage seem highly correlated with structural evolutions in the initial charged state, and may ultimately degrade the cycling stability. This study advances understanding of the structural inhomogeneity within primary particles during various electrochemical processes and may facilitate the development of new Ni-rich cathode materials. English John Wiley & Sons Ltd. LIXNIYMNZCO1-Y-ZO2 CATHODE MATERIALS LITHIUM-ION BATTERIES THERMAL-STABILITY CHARGE LI DEGRADATION TRANSITION ELECTRODES MECHANISM In-Depth TEM Investigation on Structural Inhomogeneity within a Primary LixNi0.835Co0.15Al0.015O2 Particle: Origin of Capacity Decay during High-Rate Discharge Article 10.1002/anie.201910670 1 Angewandte Chemie International Edition, v.59, no.6, pp.2385 - 2391 Angewandte Chemie International Edition 59 6 2385 2391 scie scopus 000498761700001 2-s2.0-85076426951 Chemistry, Multidisciplinary Chemistry Article LIXNIYMNZCO1-Y-ZO2 CATHODE MATERIALS LITHIUM-ION BATTERIES THERMAL-STABILITY CHARGE LI DEGRADATION TRANSITION ELECTRODES MECHANISM Ni-rich cathode materials high-rate discharge lithium-ion batteries structural inhomogeneity TEM depth profiling