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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.125  No.6 (June) (2017)  >  pp.433-437

Journal of the Ceramic Society of Japan
<<Previous article Vol.125  No.6 (June) (2017)   pp.433 - 437 Next article>>

Electrical and mechanical properties of glass and glass-ceramic electrolytes in the system Li3BO3–Li2SO4

Masahiro TATSUMISAGO1), Ryohei TAKANO1), Masashi NOSE1), Kenji NAGAO1), Atsutaka KATO1), Atsushi SAKUDA2), Kiyoharu TADANAGA3), Akitoshi HAYASHI1)
1) Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University 2) Department of Energy and Environment, Research Institute of Electrochemical Energy, National Institute of Advanced Industrial Science and Technology (AIST) 3) Department of Materials Chemistry, Faculty of Engineering, Hokkaido University

Low-melting oxide glasses are promising as electrolytes for all-solid-state lithium rechargeable batteries. Glasses in the pseudobinary system Li3BO3–Li2SO4 were prepared by a mechanochemical technique. Raman spectra revealed that the glasses contained no macroanions which form networks but consisted only of Li+ ions and two discrete ortho-oxoanions, BO33− and SO42−. The density and molar volume increased and elastic moduli decreased with an increase in the Li2SO4 content in the glasses. The heat treatment of the Li3BO3–Li2SO4 glasses at around 300°C brought about the crystallization to form ion conducting glass-ceramics. Electrical conductivities of the glasses and glass-ceramics in this system were maximized with the mixing of Li3BO3 and Li2SO4. The conductivities were higher in the glass-ceramics of the compositions with small amounts of Li2SO4, ranging from 3 × 10−6 to 1 × 10−5 S cm−1 at room temperature, compared to the corresponding glasses. This conductivity enhancement by the heat treatment is probably due to the precipitation of solid solutions with a high temperature Li3BO3 phase.


Keyword:
Solid electrolyte, Ionic glass, Glass-ceramic, All-solid-state battery

Received: February 13, 2017
Accepted: March 28, 2017 , Published online: June 01, 2017

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