Chemically oxidized γ-MnO2 for lithium secondary batteries: Structure and intercalation/deintercalation properties

Won Il Jung; Miki Nagao; Cédric Pitteloud; Keiji Itoh; Atsuo Yamada; Ryoji Kanno

doi:10.1039/b812683f

Chemically oxidized γ-MnO₂ for lithium secondary batteries: Structure and intercalation/deintercalation properties

Won Il Jung, Miki Nagao, Cédric Pitteloud, Keiji Itoh, Atsuo Yamada, Ryoji Kanno

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

Structural changes of chemically lithiated γ-MnO₂ during chemical oxidation were characterized by X-ray diffraction combined with a stacking fault analysis and neutron total scattering with a local structure analysis. Lithium ions intercalate into the crystallographic sites around "Ruetschi" protons prior to those around "Coleman" protons for the chemically lithiated γ-MnO₂. The "Ruetschi" and "Coleman" protons have O-H bond lengths of 1.2 A° and 1.9 A°, respectively, which decreased after the chemical oxidation. The chemically intercalated lithium ions are placed at the center of oxygen octahedra with an O-Li length of 1.9 A°.

Original language	English
Pages (from-to)	800-806
Number of pages	7
Journal	Journal of Materials Chemistry
Volume	19
Issue number	6
DOIs	https://doi.org/10.1039/b812683f
Publication status	Published - Feb 2 2009
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Materials Chemistry

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T1 - Chemically oxidized γ-MnO2 for lithium secondary batteries

T2 - Structure and intercalation/deintercalation properties

AU - Jung, Won Il

AU - Nagao, Miki

AU - Pitteloud, Cédric

AU - Itoh, Keiji

AU - Yamada, Atsuo

AU - Kanno, Ryoji

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AB - Structural changes of chemically lithiated γ-MnO2 during chemical oxidation were characterized by X-ray diffraction combined with a stacking fault analysis and neutron total scattering with a local structure analysis. Lithium ions intercalate into the crystallographic sites around "Ruetschi" protons prior to those around "Coleman" protons for the chemically lithiated γ-MnO2. The "Ruetschi" and "Coleman" protons have O-H bond lengths of 1.2 A° and 1.9 A°, respectively, which decreased after the chemical oxidation. The chemically intercalated lithium ions are placed at the center of oxygen octahedra with an O-Li length of 1.9 A°.

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