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Electrochemical properties of all-solid-state lithium secondary batteries using Li-argyrodite Li6PS5Cl as solid electrolyte

Published online by Cambridge University Press:  12 February 2013

Sylvain Boulineau
Affiliation:
LRCS, CNRS-UMR 7314, Université de Picardie Jules Verne, 33 Rue Saint Leu, 80039 Amiens, France
Jean-Marie Tarascon
Affiliation:
LRCS, CNRS-UMR 7314, Université de Picardie Jules Verne, 33 Rue Saint Leu, 80039 Amiens, France
Vincent Seznec
Affiliation:
LRCS, CNRS-UMR 7314, Université de Picardie Jules Verne, 33 Rue Saint Leu, 80039 Amiens, France
Virginie Viallet
Affiliation:
LRCS, CNRS-UMR 7314, Université de Picardie Jules Verne, 33 Rue Saint Leu, 80039 Amiens, France
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Abstract

Highly ion-conductive Li6PS5Cl Li-argyrodites were prepared through a high energy ball milling. Electrical and electrochemical properties were investigated. Ball-milled compounds exhibit a high conductivity of 1.33×10−4 S/cm with an activation energy of 0.3-0.4 eV and an electrochemical stability up to 7V vs. lithium. These results are obtained after only 10 hours of milling and with no additional heat treatment.

To validate the use of the Li6PS5Cl-based solid electrolyte, all-solid-state batteries using LiCoO2 and Li4Ti5O12 as active material have been realized. The optimization of the electrode composition led to a maximum of 46 and 27 mAh per gram of composite for LiCoO2 and Li4Ti5O12-based half-cells respectively. The assembled all-solid-state LiCoO2 / Li6PS5Cl / Li4Ti5O12 battery presents a sustainable reversible capacity of 27 mAh per gram of active material and a coulomb efficiency close to 99%.

Type
Articles
Copyright
Copyright © Materials Research Society 2013

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References

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