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Abstract Novel glass-ceramic electrolytes of (100-x) (70Li2S-30P2S5)-xNi2P (x = 0, 1, 2, 3, 4) with high ionic conductivity were proposed with the addition of Ni2P. The 2 mol% Ni2P containing electrolyte (Li7Ni0.2P3.1S11) displays… Click to show full abstract
Abstract Novel glass-ceramic electrolytes of (100-x) (70Li2S-30P2S5)-xNi2P (x = 0, 1, 2, 3, 4) with high ionic conductivity were proposed with the addition of Ni2P. The 2 mol% Ni2P containing electrolyte (Li7Ni0.2P3.1S11) displays the highest lithium-ion conductivity of 2.22 mS cm−1 at room temperature, which is 1.6 times higher than pristine Li7P3S11. By direct combination with Li2S, the fabricated Li7Ni0.2P3.1S11-Li2S all-solid-state battery exhibits an initial discharge capacity of 429 mAh g−1 at 0.064 mA cm−2 and 454 mAh g−1 at 20th charging/discharging cycle with a high Coulombic efficiency of 99.7%.
Journal Title: Electrochemistry Communications
Year Published: 2018
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