Direct Observation of Lithium Staging in Partially Delithiated LiFePO4 at Atomic Resolution

Overview

Journal J Am Chem Soc

Publisher American Chemical Society

Specialty Chemistry

Date 2011 Mar 12

PMID 21391668

Citations 15

Authors

Lin Gu

Changbao Zhu

Hong Li

Yan Yu

Chilin Li

Susumu Tsukimoto

Joachim Maier

Yuichi Ikuhara

Affiliations

Soon will be listed here.

Abstract

Lithium ions in LiFePO(4) were observed directly at atomic resolution by an aberration-corrected annular-bright-field scanning transmission electron microscopy technique. In addition, it was found in partially delithiated LiFePO(4) that the remaining lithium ions preferably occupy every second layer, along the b axis, analogously to the staging phenomenon observed in some layered intercalation compounds. This new finding challenges previously proposed LiFePO(4)/FePO(4) two-phase separation mechanisms.

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