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Improved composite electrode and lithium battery performance From smart use of the polymers and their properties

Published online by Cambridge University Press:  01 February 2011

Vincent Gaudefroy ,
Delphine Guy ,
Bernard Lestriez ,
Renaud Bouchet  and
Dominique Guyomard
Vincent Gaudefroy
Affiliation:
Institut des Matériaux Jean Rouxel, CNRS, Université de Nantes, B.P. 32229, 44322 Nantes Cedex 3, France
Delphine Guy
Affiliation:
Institut des Matériaux Jean Rouxel, CNRS, Université de Nantes, B.P. 32229, 44322 Nantes Cedex 3, France
Bernard Lestriez
Affiliation:
Institut des Matériaux Jean Rouxel, CNRS, Université de Nantes, B.P. 32229, 44322 Nantes Cedex 3, France
Renaud Bouchet
Affiliation:
Laboratoire Madirel, Université de Marseille, Centre St Jérome, Av. Escadrille Normandie Niemen, 13397 Marseille cedex 20
Dominique Guyomard
Affiliation:
Institut des Matériaux Jean Rouxel, CNRS, Université de Nantes, B.P. 32229, 44322 Nantes Cedex 3, France
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Abstract

To increase electrode cycling performance in batteries, most researchers generally focus their work on the active material optimisation. Here we show that the polymeric binder of the composite electrode may have an important role on the electrode performance. We describe a new tailored polymeric binder combination with controlled polymer-filler (carbon black) interactions that allows the preparation of new and more efficient electrode architecture. Using this polymeric binder, composite electrodes based on Li1.2V3O8 display a room-temperature cycling capacity of 280 mAh/g (C/5 rate, 3.3–2 V) instead of 150 mAh/g using a standard-type (PVdF-HFP binder) composite electrode. We have coupled SEM observations, galvanostatic cycling and electronic conductivity measurements in order to define and understand the impact of the microstructure of the composite electrode on its electrochemical performance.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 835: Symposium K – Solid-State Ionics , 2004 , K10.3
Copyright
Copyright © Materials Research Society 2005

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References

REFERENCES

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