Li2S P2S5 Solid Electrolyte Research Articles

Addition of P2Se5 to Li2S-P2S5 Solid Electrolyte and Effect on Ionic Conductivity and Cell Performance

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Electrochemical performance of all-solid-state lithium secondary batteries using Li4Ti5O12 electrode and Li2S–P2S5 solid electrolytes

All-solid-state Li–In/Li4Ti5O12 cells using Li2S–P2S5 solid electrolytes were assembled to investigate their electrochemical properties in the wide voltage range of 0–3 V (versus Li). The Li/Li4Ti5O12 cells using 1 M LiPF6 in ethylene carbonate and diethyl carbonate were fabricated for comparison with the all-solid-state cells. The capacity of the all-solid-state cell using the 70Li2S·27P2S5·3P2O5 (mol%) solid electrolyte decreased with an increase in the current density as well as the cell using the liquid electrolyte. However, the all-solid-state cell was charged and discharged even at a high current density of 10 mA/cm2. The all-solid-state cell was cycled at 1.3 mA/cm2 and retained 90% of the first reversible capacity of about 120 mAh/g after 500 cycles. The all-solid-state cell cycling at 100 °C showed the small overpotential and reversible capacity of about 120 mAh/g at 13 mA/cm2.

All-Solid-State Lithium Secondary Batteries using LiCoO2 Particles with PLD Coatings of Li2S-P2S5 Solid Electrolytes

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Li2S-P2S5 Based Solid State Electrolytes for Lithium Ion Battery Applications

Sulfide-based Li2S-P2S5 solid state electrolytes were prepared by a high energy ball milling process. Characterization of the xLi2S-(100-x)P2S5] system for 70<x<80 was carried out for both amorphous glass and crystalline glass-ceramic materials by X-ray diffraction and electrochemical methods. Both glass and glass-ceramic electrolytes exhibited high conductivity over 10-4 S cm-1 at room temperature. Glass-ceramics were proved to have higher stability against lithium metal than respective glass electrolytes. All-solid-state batteries using the glass and glass-ceramic electrolytes were constructed to evaluate the cell performance as a lithium secondary battery. The cell Li/80Li2S-20P2S5 glass/LiCoO2 performed the best but displayed a large initial irreversible capacity.

Electrochemical Properties of All-Solid-State Li/S Batteries with Li2S-P2S5 Solid Electrolytes

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All-solid-state lithium secondary batteries with SnS-P2S5 electrodes and Li2S-P2S5 solid electrolytes

All-solid-state lithium secondary batteries with SnS-P2S5 electrodes and Li2S-P2S5 solid electrolytes