TY - JOUR
T1 - Origin and Regulation of Interface Fusion during Synthesis of Single-Crystal Ni-Rich Cathodes
AU - Qiu, Lang
AU - Zhang, Mengke
AU - Song, Yang
AU - Wu, Zhenguo
AU - Zhang, Heng
AU - Hua, Weibo
AU - Sun, Yan
AU - Kong, Qingquan
AU - Feng, Wei
AU - Wang, Ke
AU - Xiao, Yao
AU - Guo, Xiaodong
N1 - Publisher Copyright:
© 2023 Wiley-VCH GmbH.
PY - 2023/3/13
Y1 - 2023/3/13
N2 - Interface fusion plays a key role in constructing Ni-based single-crystal cathodes, and is governed by the atomic migration related to kinetics. However, the interfacial atom migration path and its control factors are lack of clearly understanding. Herein, we systematically probe the solid-state synthesis mechanism of single-crystal LiNi0.92Co0.04Mn0.04O2, including the effects of precursor size, Li/transition metal (TM) ratio and sintering temperature on the structure. Multi-dimensional analysis unravels that thermodynamics drives interface atoms migration through intermediate state (i.e., cation mixing phase) to induce grain boundary fusion. Moreover, we demonstrate that smaller precursor size (<6 μm), lager Li/TM ratio (>1.0) and higher temperature (≥810 °C) are conducive to promote the growth of the intermediate state due to reaction kinetics enhancement, and ultimately strengthen the atomic migration-induced interface fusion.
AB - Interface fusion plays a key role in constructing Ni-based single-crystal cathodes, and is governed by the atomic migration related to kinetics. However, the interfacial atom migration path and its control factors are lack of clearly understanding. Herein, we systematically probe the solid-state synthesis mechanism of single-crystal LiNi0.92Co0.04Mn0.04O2, including the effects of precursor size, Li/transition metal (TM) ratio and sintering temperature on the structure. Multi-dimensional analysis unravels that thermodynamics drives interface atoms migration through intermediate state (i.e., cation mixing phase) to induce grain boundary fusion. Moreover, we demonstrate that smaller precursor size (<6 μm), lager Li/TM ratio (>1.0) and higher temperature (≥810 °C) are conducive to promote the growth of the intermediate state due to reaction kinetics enhancement, and ultimately strengthen the atomic migration-induced interface fusion.
KW - Atoms Migration
KW - Interface Fusion
KW - Kinetics
KW - Single-Crystal Cathodes
UR - http://www.scopus.com/inward/record.url?scp=85147981070&partnerID=8YFLogxK
U2 - 10.1002/anie.202300209
DO - 10.1002/anie.202300209
M3 - 文章
C2 - 36718610
AN - SCOPUS:85147981070
SN - 1433-7851
VL - 62
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 12
M1 - e202300209
ER -