Mechano-chemical Synthesis of Lithium Ion Conducting Materials in the System Li2O-Li2S-P2S5

• Machida Nobuya

  Department of Chemistry, Konan University

• Yoneda Yuki

  Department of Chemistry, Konan University

• Shigematsu Toshihiko

  Department of Chemistry, Konan University

Abstract

Amorphous solid electrolytes were prepared in the compositions 75 {(1-x)Li₂O⋅xLi₂S}⋅5P₂S₅ (mol%) by using a high-energy ball-milling process. The amorphous materials showed lithium ion conductivities higher than 10^-3 Sm^-1 at room temperature. The amorphous 7.5Li₂O⋅67.5Li₂S⋅5P₂S₅ (mol%) sample showed the highest lithium ion conductivity σ_298K=2.7×10^-2 Sm^-1 at room temperature among the obtained samples. An all-solid-state battery was assembled by using the amorphous 7.5Li₂O⋅67.5Li₂S⋅5P₂S₅ sample as solid electrolytes. In the battery, TiS₂ and Li_4.4Si were employed as positive and negative electrode materials, respectively. The discharge-charge cycling test of the battery was carried out at room temperature under a constant current density of 64μAcm^-2 with the discharge-charge criteria of voltages 1.1 and 2.6 V. The battery showed successive reversibility with a large specific capacity; the specific capacity calculated on the base of the weight of the TiS₂ positive electrode materials was about 170 mAhg^-1.

Journal

• Journal of the Japan Society of Powder and Powder Metallurgy

  Journal of the Japan Society of Powder and Powder Metallurgy 51 (2), 91-97, 2004

  Japan Society of Powder and Powder Metallurgy

Keywords

• mechanical milling
• lithium ion conductor
• solid electrolyte
• lithium battery
• solid-state battery

Details

• CRID: 1390282681284936448
• NII Article ID: 10012105513
• NII Book ID: AN00222724
• DOI: 10.2497/jjspm.51.91
• COI: 1:CAS:528:DC%2BD2cXjtVSmu7o%3D
• ISSN: 18809014
• ISSN: 05328799
• ISSN: http://id.crossref.org/issn/05328799
• NDL BIB ID: 6873268
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6873268
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed