title: In situ transmission electron microscopy observations of electrochemical oxidation of Li2O2.
abstract: In this Letter, we report the first in situ transmission electron microscopy observation of electrochemical oxidation of Li2O2, providing insights into the rate limiting processes that govern charge in Li-O2 cells. In these studies, oxidation of electrochemically formed Li2O2 particles, supported on multiwall carbon nanotutubes (MWCNTs), was found to occur preferentially at the MWCNT/Li2O2 interface, suggesting that electron transport in Li2O2 ultimately limits the oxidation kinetics at high rates or overpotentials.
authors.affiliation: Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, USA.
authors.forename: Li
authors.initials: L
authors.lastname: Zhong
authors.forename: Robert R
authors.initials: RR
authors.lastname: Mitchell
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
authors.forename: Betar M
authors.initials: BM
authors.lastname: Gallant
authors.forename: Carl V
authors.initials: CV
authors.lastname: Thompson
authors.forename: Jian Yu
authors.initials: JY
authors.lastname: Huang
authors.forename: Scott X
authors.initials: SX
authors.lastname: Mao
authors.forename: Yang
authors.initials: Y
authors.lastname: Shao-Horn