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Lithium Intercalation from Aqueous Solutions

Published online by Cambridge University Press:  16 February 2011

W. Li ,
J. R. Dahn  and
J. H. Root
W. Li
Affiliation:
Department of Physics, Simon Fraser University Burnaby, B. C. V5A 1S6, Canada
J. R. Dahn
Affiliation:
Department of Physics, Simon Fraser University Burnaby, B. C. V5A 1S6, Canada
J. H. Root
Affiliation:
AECL Research, Chalk River Laboratories. Chalk River, Ontario KOJ 1JO, Canada
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Abstract

Lithium can be intercalated into a variety of materials using aqueous electrochemical methods, provided that certain criteria are met. The materials must be stable in concentrated Li+ aqueous solution and Li intercalation must take priority over hydrogen intercalation. We use X-ray and neutron diffraction, as well as electrochemical methods to investigate if lithium or hydrogen is intercalated into certain hosts. For example, spinel Li2Mn2O4 can be made from spinel LiMn204 by intercalating one Li per mole in an electrochemical cell with 1 M LiOH electrolyte. If the electrochemical reduction is carried out further, beyond one electron per mole, Mn(OH)2 is then formed, as we prove using neutron diffraction. By carefully selecting electrode materials and electrolyte composition it is possible to make rechargeable lithium-ion cells with aqueous electrolytes. For example, LiMn204/γ-Li0.36MnO2 can be selected as an electrode couple, and5 M LiNO3 in water as an electrolyte to make lithium-ion cells with aqueous electrolytes.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 369: Symposium U – Solid State Ionics IV , 1994 , 69
Copyright
Copyright © Materials Research Society 1995

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References

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