Persistent State-of-Charge Heterogeneity in Relaxed, Partially Charged Li1- x Ni1/3 Co1/3 Mn1/3 O2 Secondary Particles

Persistent State-of-Charge Heterogeneity in Relaxed, Partially Charged Li1- x Ni1/3 Co1/3 Mn1/3 O2 Secondary Particles

© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 28(2016), 31 vom: 02. Aug., Seite 6631-8
1. Verfasser: Gent, William E (VerfasserIn)
Weitere Verfasser: Li, Yiyang, Ahn, Sungjin, Lim, Jongwoo, Liu, Yijin, Wise, Anna M, Gopal, Chirranjeevi Balaji, Mueller, David N, Davis, Ryan, Weker, Johanna Nelson, Park, Jin-Hwan, Doo, Seok-Kwang, Chueh, William C
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2016
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article X-ray microscopy capacity fade lithium-ion batteries positive electrode stress
Beschreibung
Zusammenfassung:© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Ex situ transmission X-ray microscopy reveals micrometer-scale state-of-charge heterogeneity in solid-solution Li1- x Ni1/3 Co1/3 Mn1/3 O2 secondary particles even after extensive relaxation. The heterogeneity generates overcharged domains at the cutoff voltage, which may accelerate capacity fading and increase impedance with extended cycling. It is proposed that optimized secondary structures can minimize the state-of-charge heterogeneity by mitigating the buildup of nonuniform internal stresses associated with volume changes during charge
Beschreibung:Date Completed 17.07.2018
Date Revised 30.09.2020
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.201601273