Low temperature super(7)Li-NMR investigations on lithium inserted into carbon anodes for rechargeable lithium-ion cells

Lithium fully inserted into both graphitizable and non-graphitizable carbons has been investigated by super(7)Li-NMR spectroscopy at low temperatures. It was found that lithium only in the non-graphitizable carbons heat-treated at ca. 1000 degree C showed peak separation phenomena at temperatures be...

Full description

Saved in:
Bibliographic Details
Published in:Journal of power sources 1999-09, Vol.81, p.397-400
Main Authors: Tatsumi, K, Conard, J, Nakahara, M, Menu, S, Lauginie, P, Sawada, Y, Ogumi, Z
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Lithium fully inserted into both graphitizable and non-graphitizable carbons has been investigated by super(7)Li-NMR spectroscopy at low temperatures. It was found that lithium only in the non-graphitizable carbons heat-treated at ca. 1000 degree C showed peak separation phenomena at temperatures below -30 degree C. This peak separation is explained as exchange of lithium nuclei between different kinds of lithium species in the carbons. In addition, an equilibrium relationship between the lithium species in the non-graphitizable carbons was found in the temperature range from -30 to -150 degree C.
ISSN:0378-7753