The poor long-term cycling stability, including the fast capacity fade and the severe voltage decay, has become the main concern hindering the practical application of Li-rich layered oxides, a promising cathode for high- energy-density Li-ion battery. Herein, we design and electrochemically construct a ~10 nm-thick LixTM3-xO4- type (TM ¼Ni, Co, Mn, 0 3O4-type spinel phase and the good Liþconductivity of LiMn2O4-type spinel phase. Systemic structural and electrochemical analysis demonstrate that, it slows down the activation rate of Li2MnO3 component and efficiently alleviates the lattice O loss at high voltage (>4.5 V) and Mn dissolution, thereby suppressing the structural degradation from the layered phase to the spinel phase in the bulk, eventually significantly enhancing the long-term cycling stability. This study adds richness into the Mn-based spinel phase system and provides a new heterostructure design strategy to improve the electrochemical performance of Li-rich layered cathodes and beyond.
@article{osti_1768872,
author = {Zhang, Mingjian and Li, Zhibo and Yu, Lei and Kong, Defei and Li, Yiwei and Cao, Bo and Zhao, Wenguang and Wen, Jianguo and Pan, Feng},
title = {Enhanced long-term cyclability in Li-Rich layered oxides by electrochemically constructing a Li<sub>x</sub>TM<sub>3-x</sub>O<sub>4</sub>-type spinel shell},
annote = {The poor long-term cycling stability, including the fast capacity fade and the severe voltage decay, has become the main concern hindering the practical application of Li-rich layered oxides, a promising cathode for high- energy-density Li-ion battery. Herein, we design and electrochemically construct a ~10 nm-thick LixTM3-xO4- type (TM ¼Ni, Co, Mn, 0 3O4-type spinel phase and the good Liþconductivity of LiMn2O4-type spinel phase. Systemic structural and electrochemical analysis demonstrate that, it slows down the activation rate of Li2MnO3 component and efficiently alleviates the lattice O loss at high voltage (>4.5 V) and Mn dissolution, thereby suppressing the structural degradation from the layered phase to the spinel phase in the bulk, eventually significantly enhancing the long-term cycling stability. This study adds richness into the Mn-based spinel phase system and provides a new heterostructure design strategy to improve the electrochemical performance of Li-rich layered cathodes and beyond.},
doi = {10.1016/j.nanoen.2020.105188},
url = {https://www.osti.gov/biblio/1768872},
journal = {Nano Energy},
issn = {ISSN 2211-2855},
volume = {77},
place = {United States},
publisher = {Elsevier},
year = {2020},
month = {07}}
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; National Science Foundation (NSF); National Key Research and Development Program of China
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1768872
Alternate ID(s):
OSTI ID: 1809802
Journal Information:
Nano Energy, Journal Name: Nano Energy Vol. 77; ISSN 2211-2855