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Sodium ion sulfide solid electrolyte and preparation method thereof
The invention discloses a sodium ion sulfide solid electrolyte and a preparation method thereof, the chemical composition formula of the sodium ion sulfide solid electrolyte is Na < 3-x > Sb < 1-x > W < x > S < 4-y > O < y >, and x and y are respectively the molar ratio 0 < lt > of an element W and an element O in the sodium ion sulfide solid electrolyte; x is greater than or equal to 0 and less than or equal to 0.4, y is greater than or equal to 0 and less than or equal to 0.3, a crystal phase of the sodium ion sulfide solid electrolyte is c-Na3SbS4, and a unit cell center is composed of SbS43 and WS42. W and O are introduced at a high concentration, Na vacancies can be effectively generated in a crystal lattice in the Na3SbS4 crystal through charge compensation, distortion in the C-axis direction is reduced, formation of a cubic phase is facilitated, isotropic 3D fast ion conduction is promoted, and high ion conductivity of 10 <-2 > orders of magnitude can be achieved; and meanwhile, a self-passivation layer can be generated at the interface of the electrolyte and the Na metal anode, so that the cycling stability of the electrolyte is fundamentally improved.
本发明公开了一种钠离子硫化物固态电解质及其制备方法，该钠离子硫化物固态电解质的化学组成式为Na3‑xSb1‑xWxS4‑yOy，其中x、y分别为钠离子硫化物固态电解质中元素W、元素O的摩尔比，0
Sodium ion sulfide solid electrolyte and preparation method thereof
The invention discloses a sodium ion sulfide solid electrolyte and a preparation method thereof, the chemical composition formula of the sodium ion sulfide solid electrolyte is Na < 3-x > Sb < 1-x > W < x > S < 4-y > O < y >, and x and y are respectively the molar ratio 0 < lt > of an element W and an element O in the sodium ion sulfide solid electrolyte; x is greater than or equal to 0 and less than or equal to 0.4, y is greater than or equal to 0 and less than or equal to 0.3, a crystal phase of the sodium ion sulfide solid electrolyte is c-Na3SbS4, and a unit cell center is composed of SbS43 and WS42. W and O are introduced at a high concentration, Na vacancies can be effectively generated in a crystal lattice in the Na3SbS4 crystal through charge compensation, distortion in the C-axis direction is reduced, formation of a cubic phase is facilitated, isotropic 3D fast ion conduction is promoted, and high ion conductivity of 10 <-2 > orders of magnitude can be achieved; and meanwhile, a self-passivation layer can be generated at the interface of the electrolyte and the Na metal anode, so that the cycling stability of the electrolyte is fundamentally improved.
本发明公开了一种钠离子硫化物固态电解质及其制备方法，该钠离子硫化物固态电解质的化学组成式为Na3‑xSb1‑xWxS4‑yOy，其中x、y分别为钠离子硫化物固态电解质中元素W、元素O的摩尔比，0
Sodium ion sulfide solid electrolyte and preparation method thereof
一种钠离子硫化物固态电解质及其制备方法
JIAO QING (author) / SHEN YU (author) / LIN CHANGGUI (author) / GAO CHENGWEI (author) / KANG SHILIANG (author) / LIU YONGXING (author)
2024-11-22
Patent
Electronic Resource
Chinese
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