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

Patent metadata

Field	Value
Publication number	US-2023089884-A1
Application number	US-202217993893-A
Country	US
Kind code	A1
Filing date	Nov 24, 2022
Priority date	Aug 24, 2021
Publication date	Mar 23, 2023
Grant date	—

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: a solid electrolyte particles of sodium super ionic conductor is modified by dielectric barrier discharge plasma to obtain activated solid electrolyte particles of sodium super ionic conductor; preparation of composite solid electrolyte: weighing polymer and the activated sodium super ionic conductor type solid electrolyte particles in a predetermined ratio, dissolving the polymer and the activated sodium super ionic conductor type solid electrolyte particles in an organic solvent to obtain a mixed solution, then pouring the mixed solution into a predetermined mold, then drying to remove the organic solvent and forming into 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.

2 . The method according to claim 1 , wherein in the step of dielectric barrier discharge plasma modification treatment of sodium super ionic conductor type solid electrolyte particles, the plasma modification process adopts preset plasma atmosphere, preset gas flow rate, preset voltage, preset current, and the first preset time, the preset plasma atmosphere is one or more of nitrogen, oxygen, argon, nitrogen oxygen mixture, nitrogen argon mixture, and air, the pressure of the preset plasma atmosphere is atmospheric pressure, the preset voltage is the voltage applied to the sodium super ionic conductor solid electrolyte particles, and the voltage range is 10 V-150 V, the preset current is the current applied to the sodium super ionic conductor solid electrolyte particles, and the current range is 0.2 A~2 A, and the first preset time is 1 min~60 min.

3 . The method according to claim 1 , wherein the predetermined ratio is the mass ratio of the polymer to the activated sodium super ionic conductor type solid electrolyte particles, with the mass ratio ranging from 10 wt.% to 80 wt.%.

4 . 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.

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

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

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

8 . 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 include: pour the mixed solution into the mold, put it into a vacuum drying oven, and then adjust the temperature in the vacuum drying oven to a preset temperature and maintain 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 range is 40° C.~100° C.

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

10 . A method for plasma modification of sodium super ionic conductor type solid state electrolytes, wherein the method comprises the following steps:
plasma activation of sodium super ionic conductor type solid electrolyte particles to obtain activated sodium super ionic conductor type solid electrolyte particles; obtaining a composite solid electrolyte film using the activated sodium super ionic conductor type solid electrolyte particles, the composite solid electrolyte film having a thickness of 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

• H01M10/0562 Primary

  Solid materials · CPC title

• H01M10/0565 Primary

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

• H01M2300/0082

  Organic polymers · 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