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Post-anneal effect on the structural and Li+ conduction properties in NaI - LiBH4 system

Published online by Cambridge University Press:  12 January 2017

Reona Miyazaki ,
Dai Kurihara ,
Daiki Hayashi ,
Seiya Furughori ,
Masatoshi Shomura  and
Takehiko Hihara
Reona Miyazaki*
Affiliation:
Physical Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan
Dai Kurihara
Affiliation:
Physical Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan
Daiki Hayashi
Affiliation:
Physical Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan
Seiya Furughori
Affiliation:
Physical Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan
Masatoshi Shomura
Affiliation:
Physical Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan
Takehiko Hihara
Affiliation:
Physical Science and Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan
*
*(Email: miyazaki.reona@nitech.ac.jp)
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Abstract

In the present work, NaI – LiBH4 system fabricated by ball milling were post annealed and their variation of Li+ ion conductivity were investigated. From the change of lattice parameters by post annealing, it was suggested that unreacted LiBH4 existed in as-milled sample further dissolved into NaI, which implied an enhancement of the sample homogeneity. On the other hand, the segregation of LiI was anticipated when ball milled 15NaI·LiI (BH4 free sample) was annealed at 423 K. Li+ conductivity was decreased by post anneal process and compositional dependence of an activation energy for Li+ conduction was indicated for the homogeneous NaI – LiBH4 system.

Keywords

ionic conductorLimechanical alloying

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Type
Articles
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MRS Advances , Volume 2 , Issue 7: Electrochemistry , 2017 , pp. 389 - 394
Copyright
Copyright © Materials Research Society 2017 

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