open access

https://hdl.handle.net/2115/73934

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

英語

All-solid-state batery

2017-06-01

日本セラミックス協会

日本セラミックス協会学術論文誌

125(6)

433-437

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.

学術雑誌論文

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Creative Commons Attribution-NoDerivatives 4.0 International

1882-0743

1348-6535