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LaF3-BaF2-KF derived electrolyte in solid state fluoride-ion battery

Published online by Cambridge University Press:  01 February 2011

Dechao Wang
Affiliation:
dechao.wang@kit.edu, Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology, Eggenstein-Leopoldshafen, Germany
Anji Reddy Munnangi
Affiliation:
munnangi.reddy@kit.edu, Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology, Eggenstein-Leopoldshafen, Germany
Horst Hahn
Affiliation:
horst.hahn@kit.edu, Karlsruhe Institute of Technology (KIT), Institute of Nanotechnology, Eggenstein-Leopoldshafen, Germany
Max Fichtner
Affiliation:
m.fichtner@kit.edu, United States
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Abstract

Solid-state based battery technology offers, in principle, the largest temperature range (from room temperature to 500 °C) of any battery technology. In fluoride based batteries, the chemical reaction used to create electrical energy is a solid-state reaction of a metal with fluoride anion [1]. Among the various types of solid preparation techniques, the mechanochemical synthesis has been recognized as a powerful route to novel, high-performance, and low-cost materials [2]. Thus, a mixed and highly disordered fluoride phase with retained cubic symmetry can be obtained with a very high Fˉ diffusivity [3].

In our group, a series of new electrolytes was developed, namely LaF3-BaF2-KF solid solutions, using mechanosynthesis method. The cubic structure of the product was confirmed by XRD. The nanoscale nature and morphology of the samples were characterized by SEM and TEM. First Solid-state electrochemical cells were built with LiF based composite cathode, LaF3-BaF2-KF derived electrolyte and Fe based composite anode.

Type
Research Article
Copyright
Copyright © Materials Research Society 2010

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