Solid Nanocomposite Electrolyte Materials

Patent metadata

Field	Value
Publication number	US-2021265654-A1
Application number	US-201816607126-A
Country	US
Kind code	A1
Filing date	Feb 20, 2018
Priority date	Apr 24, 2017
Publication date	Aug 26, 2021
Grant date	—

Abstract

A solid nanocomposite electrolyte material comprising a mesoporous dielectric material comprising a plurality of interconnected pores and an electrolyte layer covering inner surfaces of the mesoporous dielectric material. The electrolyte layer comprises: a first layer comprising a first dipolar compound or a first ionic compound, the first dipolar or ionic compound comprising a first pole of a first polarity and a second pole of a second polarity opposite to the first polarity, wherein the first layer is adsorbed on the inner surfaces with the first pole facing the inner surfaces; and a second layer covering the first layer, the second layer comprising a second ionic compound or a salt comprising first ions of the first polarity and second ions of the second polarity, wherein the first ions of the ionic compound or salt are bound to the first layer.

First claim

1 . A solid nanocomposite electrolyte material comprising:
a mesoporous dielectric material comprising a plurality of interconnected pores, the plurality of interconnected pores defining inner surfaces of the mesoporous dielectric material; and an electrolyte layer covering the inner surfaces, wherein the electrolyte layer comprises: a first layer comprising a first compound that is ionic or dipolar, the first compound comprising a first pole of a first polarity and a second pole of a second polarity opposite the first polarity, wherein the first layer is adsorbed on the inner surfaces with the first pole facing the inner surfaces, thereby introducing or modifying a charge delocalization in the first compound and introducing or modifying a molecular dipole moment over the first compound; and a second layer covering the first layer, the second layer comprising a second ionic compound comprising first ions of the first polarity and second ions of the second polarity, wherein the first ions of the second ionic compound are bound to the first layer, thereby weakening a bond between the first ions and the second ions and enhancing a mobility of the second ions.

2 . The solid nanocomposite electrolyte material according to claim 1 , wherein the electrolyte layer further comprises an additional layer covering the second layer, the additional layer being a solvent and a conductor for the second ions.

3 . The solid nanocomposite electrolyte material according to claim 1 , wherein the electrolyte layer further comprises an additional layer covering the second layer, the additional layer comprising the second ionic compound.

4 . The solid nanocomposite electrolyte material according to claim 1 , wherein the first compound comprises an organic salt, an organic complex, a eutectic salt or a metal salt.

5 . The solid nanocomposite electrolyte material according to claim 1 , wherein the first compound comprises an ionic liquid.

6 . The solid nanocomposite electrolyte material according to claim 1 , wherein the first polarity is a negative polarity and wherein the second polarity is a positive polarity.

7 . The solid nanocomposite electrolyte material according to claim 1 , wherein the second ions comprise one or more of Li + , Na + , K + , Ca 2+ , Mg 2+ , Cu 2+ , Al 3+ , Co 2+ , or Ni 2+ .

8 . The solid nanocomposite electrolyte material according to claim 1 , wherein the first ions comprise one or more of ClO 4 − , BF 4 − , PF 6 − , TFSI − , or BETI − .

9 . The solid nanocomposite electrolyte material according to claim 1 , wherein the first polarity is a positive polarity and wherein the second polarity is a negative polarity.

10 . The solid nanocomposite electrolyte material according to claim 1 , wherein the mesoporous dielectric material comprises silicon oxide, aluminum oxide, or a mixture thereof.

11 . The solid nanocomposite electrolyte material according to claim 1 , wherein the mesoporous dielectric material has a porosity between 25% and 90%.

12 . The solid nanocomposite electrolyte material according to claim 1 , wherein the plurality of interconnected pores have respective diameters between 2 nm and 50 nm.

13 . The solid nanocomposite electrolyte material according to claim 12 , wherein the mesoporous dielectric material comprises a plurality of micropores having a diameter smaller than 2 nm.

14 . (canceled)

15 . The solid nanocomposite electrolyte material according to claim 1 , wherein the solid nanocomposite electrolyte material has an ionic conductivity higher than 1 mS/cm.

16 . A solid nanocomposite electrolyte layer comprising the solid nanocomposite electrolyte material according to claim 1 .

17 . The solid nanocomposite electrolyte layer according to claim 16 , wherein the plurality of interconnected pores and the electrolyte layer form a continuous path for ion conduction between a first surface of the solid nanocomposite electrolyte layer and a second opposite surface of the solid nanocomposite electrolyte layer.

18 . A composite ion insertion electrode comprising a mixture of an active electrode material and the solid nanocomposite electrolyte material according to claim 1 .

19 . A solid-state battery cell comprising the solid nanocomposite electrolyte layer according to claim 16 .

20 . (canceled)

21 . A method for forming a solid nanocomposite electrolyte material, wherein the method comprises:
obtaining a solution comprising:
a dielectric material precursor;
a first compound that is dipolar or ionic;
a second ionic compound;
deionized water; and
an alcohol; and
converting the solution into a solid material by inducing gelification of the solution, thereby forming a gel and afterward drying the gel to form the solid nanocomposite electrolyte material.

22 - 23 . (canceled)

24 . The solid nanocomposite electrolyte material according to claim 1 , wherein the electrolyte layer is substantially continuous from a first external surface of the solid nanocomposite electrolyte material to a second external surface of the solid nanocomposite electrolyte material.

Assignees

• Imec Vzw
• Univ Leuven Kath

Inventors

• Vereecken Philippe
• Chen Xubin
• Mees Maarten

Classifications

• H01M10/0562 Primary

  Solid materials · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M2300/0094

  in the form of layered products, e.g. coatings · CPC title

• H01M10/054

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

• H01M2300/0091

  in the form of mixtures · CPC title