Building High-Rate Nickel-Rich Cathodes by Self-Organization of Structurally Stable Macrovoid.
Kirkendall effect
LiNi0.6Co0.2Mn0.2O2
high‐power lithium ion batteries
macrovoid structure
one‐pot synthesis
Journal
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
ISSN: 2198-3844
Titre abrégé: Adv Sci (Weinh)
Pays: Germany
ID NLM: 101664569
Informations de publication
Date de publication:
Apr 2020
Apr 2020
Historique:
received:
11
10
2019
revised:
17
12
2019
entrez:
11
4
2020
pubmed:
11
4
2020
medline:
11
4
2020
Statut:
epublish
Résumé
Nickel-rich materials, as a front-running cathode for lithium-ion batteries suffer from inherent degradation issues such as inter/intragranular cracks and phase transition under the high-current density condition. Although vigorous efforts have mitigated these current issues, the practical applications are not successfully achieved due to the material instability and complex synthesis process. Herein, a structurally stable, macrovoid-containing, nickel-rich material is developed using an affordable, scalable, and one-pot coprecipitation method without using surfactants/etching agents/complex-ion forming agents. The strategically developed macrovoid-induced cathode via a self-organization process exhibits excellent full-cell rate capability, cycle life at discharge rate of 5 C, and structural stability even at the industrial electrode conditions, owing to the fast Li-ion diffusion, the internal macrovoid acting as "buffer zones" for stress relief, and highly stable nanostructure around the void during cycling. This strategy for nickel-rich cathodes can be viable for industries in the preparation of high-performance lithium-ion cells.
Identifiants
pubmed: 32274299
doi: 10.1002/advs.201902844
pii: ADVS1558
pmc: PMC7140999
doi:
Types de publication
Journal Article
Langues
eng
Pagination
1902844Informations de copyright
© 2020 The Authors. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim.
Déclaration de conflit d'intérêts
The authors declare no conflict of interest.
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