Method for plasma modification of sodium super ionic conductor type solid electrolyte

Patent metadata

Field	Value
Publication number	US-11817552-B2
Application number	US-202217993893-A
Country	US
Kind code	B2
Filing date	Nov 24, 2022
Priority date	Aug 24, 2021
Publication date	Nov 14, 2023
Grant date	Nov 14, 2023

Abstract

The present disclosure discloses a method for plasma modification of sodium super ionic conductor type solid electrolyte, which comprises: dielectric barrier discharge plasma modification of sodium super ionic conductor solid electrolyte particles to obtain activated sodium super ionic conductor solid electrolyte particles; weigh the polymer and the activated sodium super ionic conductor solid electrolyte particles in a predetermined proportion, dissolve the polymer and the activated sodium super ionic conductor solid electrolyte particles in an organic solvent to obtain a mixed solution, then pour the mixed solution into a preset mold, and then dry it to remove the organic solvent and form a composite solid electrolyte film. The composite solid electrolyte film is taken out of the mold and rolled to obtain the composite solid electrolyte film after rolling treatment.

First claim

What is claimed is:

1 . A method for plasma modification of sodium super ionic conductor type solid electrolyte, wherein the method comprises following steps:
plasma modification, the plasma modification comprising a solid electrolyte particles of sodium super ionic conductor being modified by dielectric barrier discharge plasma to obtain an activated sodium super ionic conductor type solid electrolyte particles; and preparation of composite solid electrolyte, the preparation of composite solid electrolyte comprising: a step of weighing polymer and the activated sodium super ionic conductor type solid electrolyte particles in a predetermined ratio, a step of dissolving the polymer and the activated sodium super ionic conductor type solid electrolyte particles in an organic solvent to obtain a mixed solution, a step of pouring the mixed solution into a predetermined mold, a step of drying to remove the organic solvent and forming into a composite solid electrolyte film; and a step of taking the composite solid electrolyte film out of the predetermined mold and rolled to obtain a roll-treated composite solid electrolyte film.

2 . The method according to claim 1 , wherein, the plasma modification adopts a preset plasma atmosphere, a preset gas flow rate, a preset voltage, a preset current, and a first preset time, the preset plasma atmosphere is one or more of nitrogen, oxygen, argon, nitrogen oxygen mixture, nitrogen argon mixture, and air, a pressure of the preset plasma atmosphere is atmospheric pressure, the preset voltage is applied to the sodium super ionic conductor solid electrolyte particles, the preset voltage ranges from 10 V to 150 V, the preset current is applied to the sodium super ionic conductor solid electrolyte particles, the preset current ranges from 0.2 A to 2 A, and the first preset time ranges from 1 min to 60 mins.

3 . The method according to claim 1 , wherein the polymer comprises at least one of polyethylene oxide, polyvinylidene fluoride, polyvinylidene difluoride-co-hexafluoropropylene, and polyethylene glycol.

4 . The method according to claim 1 , wherein the organic solvent comprises one or both of acetone, N,N-dimethylformamide, acetonitrile, and N-methylpyrrolidone.

5 . The method according to claim 1 , wherein the step of dissolving the polymer with the activated sodium super ionic conductor type solid electrolyte particles in the organic solvent to obtain a mixed solution comprises dissolving the polymer with the activated sodium super ionic conductor type solid electrolyte particles in an organic solvent and performing mechanical ball milling to obtain the mixed solution.

6 . The method according to claim 5 , wherein the mechanical ball milling is carried out at a predetermined mechanical ball milling speed, and the predetermined mechanical ball milling speed ranges from 150 r/min to 400 r/min; a time of the mechanical ball milling is a second preset time, and the range of the second preset time is 5 h~48 h.

7 . The method according to claim 1 , wherein the steps of pouring the mixed solution into a mold, drying to remove the organic solvent and forming a composite solid electrolyte film comprises: pouring the mixed solution into the mold, putting it into a vacuum drying oven, and then adjusting the temperature in the vacuum drying oven to a preset temperature and maintaining it for a third preset time to obtain the composite solid electrolyte film; the range of the third preset time is 15 h to 48 h; the preset temperature ranges from 40° C. to 100° C.

8 . The method according to claim 1 , wherein the thickness of the roll-treated composite solid electrolyte film ranges from 30 µm to 100 µm.

Assignees

• Univ Kunming Science & Technology
• Jiangsu Fengchi Carbon Based New Materials Res Institute Co Ltd

Inventors

• Liang Feng
• Hou Minjie
• Zhang Da
• Zhang Tao
• Xiang Sunzu
• Jiang Wenlong
• Xu Baoqiang
• Yang Bin

Classifications

• H01M10/0565 Primary

  Polymeric materials, e.g. gel-type or solid-type · CPC title

• H01M2300/0082

  Organic polymers · CPC title

• H01M10/0562 Primary

  Solid materials · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M10/054

  Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium · CPC title