In situ neutron radiography analysis of graphite/NCA lithium-ion battery during overcharge

In situ neutron radiography analysis of graphite/NCA lithium-ion battery during overcharge

TitleIn situ neutron radiography analysis of graphite/NCA lithium-ion battery during overcharge
Publication TypeJournal Article
Year of Publication2012
AuthorsAdam Same, Vincent S Battaglia, Hong-Yue Tang, Jae Wan Park
JournalJournal of Applied Electrochemistry
Volume42
1
Issue1
Pagination1-9
Date Published01/2012
KeywordsLithium deposition, Lithium-ion battery, Neutron radiography
Abstract

Overcharge of lithium-ion batteries can lead to the deposition of lithium ions on the surface of graphite electrodes. The phenomenon of lithium deposition causes reduced electrochemical performance and presents safety concerns for lithium-ion batteries in high-power applications. This study presents a technique using neutron radiography (NR) for in situ visualization of the effects of overcharge in a graphite/NCA (LiNi0.8Co0.15Al0.05O2) lithium-ion cell. Patterns of deposition of solid material on the surface of the graphite electrode observed in the radiographs were confirmed by direct observation of the electrode. Inductively coupled plasma mass spectrometry was used to verify the elemental contents of the deposited material. NR is shown to be a promising tool for the study of lithium-ion batteries in high-power applications.

DOI10.1007/s10800-011-0363-3