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Abstract: All-solid-state lithium batteries were fabricated by use of LiNi1/3Mn1/3Co1/3O2 powders coated with ZrO2 as positive electrode materials and amorphous Li3PS4 as solid electrolytes. The ZrO2-coated powders were prepared by a sol–gel method associated with ultrasonic irradiation. The charge–discharge cycle performance of the all-solid-state cells was improved by use of the ZrO2-coated LiNi1/3Mn1/3Co1/3O2 powders. The ZrO2 coating was effective in suppressing an increasing of the interfacial resistance between the LiNi1/3Mn1/3Co1/3O2 electrode material and the sulfide based solid electrolyte, a-Li3PS4, during charge–discharge cycling. The battery with the ZrO2-coated LiNi1/3Mn1/3Co1/3O2 showed an initial discharge capacity of 115mAhg−1 and good capacity retention even after 50cycles at a current density of 0.1mAcm−2 at room temperature. [Copyright &y& Elsevier]

Abstract: Lithium-ion conducting solid electrolytes in the composition (100-x)Li3PS4·xLiAlS2 (mol%) were prepared by the use of a high-energy ball-milling process at room temperature. Amorphous samples were obtained in the composition range of x=0 to x=13.1. In the composition of x≥18.2, a crystalline Al2S3 phase remained in the samples which were ball-milled for 35h. The lithium ion conductivity at 298K of the obtained amorphous samples was increased with an increase in the compositional parameter x and showed the maximum at the compositional parameter x=13.1 (86.9Li3PS4·13.1LiAlS2: σ298K =6.0×10−4Scm−1 at 298K). [Copyright &y& Elsevier]

Amorphous solid electrolytes in the system Li[sub2]S-P[sub2]S[sub3] were obtained in a narrow composition range at around 66.7 mol % Li[sub2]S content by a high-energy ball-milling process. The 66.7Li[sub2]S.33.3P[sub2]S[sub3] (mol %) sample showed the highest ion conductivity of 1.1 x 10[sup-4] S.cm[sup-1] at room temperature among the obtained samples. Cyclic voltammetry revealed that the sample had a wide electrochemical window of about 5 V. [ABSTRACT FROM AUTHOR]