Electrical storage system comprising a sheet-type discrete element, discrete sheet-type element, method for the production thereof, and use thereof

Patent metadata

Field	Value
Publication number	US-10673025-B2
Application number	US-201715611187-A
Country	US
Kind code	B2
Filing date	Jun 1, 2017
Priority date	Dec 1, 2014
Publication date	Jun 2, 2020
Grant date	Jun 2, 2020

Abstract

An electrical storage system is provided that has a thickness of less than 2 mm, where the system includes at least one sheet-type discrete element, the sheet-type discrete element exhibiting high resistance to an attack of alkali metals or alkali metal ions, in particular lithium, wherein the sheet-type discrete element has a low content of TiO 2 , the TiO 2 content preferably being less than 2 wt %, preferably less than 0.5 wt %, and preferably free of TiO 2 .

First claim

What is claimed is:

1. An electrical storage system, comprising:
at least one sheet-type discrete element having a thickness of less than 2 mm and being made of toughened glass,
wherein the at least one sheet-type discrete element resists an attack of alkali metals or alkali metal ions,
wherein the at least one sheet-type discrete element comprises a thickness variation of not more than 25 μm based on wafer or substrate size in a range of >100 mm in diameter,
wherein the at least one sheet-type discrete element comprises a composition comprising a TiO 2 in a content of at most 2 wt % and a compositional range selected from the group consisting of, in wt %:

Component
No. 1
No. 2
No. 3
No. 4

SiO 2
58-65
55-75 
75-85
50-65

B 2 O 3
  6-10.5

 8-18
0-6

Al 2 O 3
14-25
0-15
0.5-4.5
15-20

Li 2 O
0-7

0-6

Na 2 O

0-15
1.5-5.5
 8-15

K 2 O

0-14
0-2
0-5

MgO
0-5
0-4 

0-5

CaO
0-9
3-12

0-7

BaO
0-8
0-15

SrO
0-8

ZnO
0-2
0-5 

0-4

TiO 2

0-2 

0-1

ZrO 2

0-4

Total of MgO,
 8-18

CaO, SrO, and

BaO.

2. The electrical storage system as claimed in claim 1 , further comprising additional constituents in the form of impurities or of necessary processing-related additives and/or refining agents, with a total of the additional constituents amounting to not more than 2 wt %.

3. The electrical storage system as claimed in claim 1 , wherein the compositional range comprises range No. 1 and wherein the BaO content is between 3 wt % and 8 wt %.

4. The electrical storage system as claimed in claim 1 , wherein the sheet-type discrete element has an Li 2 O content of at least 0.1 wt %.

5. The electrical storage system as claimed in claim 1 , wherein the at least one sheet-type discrete element has at least one surface that is inert and/or impermeable to materials coming into contact with the at least one surface.

6. The electrical storage system as claimed in claim 5 , wherein the at least one surface is a barrier layer.

7. The electrical storage system as claimed in claim 6 , wherein the barrier layer is a barrier against a diffusion of metals.

8. The electrical storage system as claimed in claim 6 , wherein the barrier layer is a barrier against a diffusion of alkali metals.

9. The electrical storage system as claimed in claim 8 , wherein the barrier layer is formed by doping or overdoping with at least one alkali metal.

10. The electrical storage system as claimed in claim 5 , wherein the barrier layer is a barrier to lithium.

11. The electrical storage system as claimed in claim 1 , wherein the at least one sheet-type discrete element comprises a water vapor transmission rate (WVTR) of <10 −3 g/(m 2 ·d).

12. The electrical storage system as claimed in claim 1 , wherein the at least one sheet-type discrete element has a thickness of not more than 100 μm.

13. The electrical storage system as claimed in claim 1 , wherein the at least one sheet-type discrete element has a specific electrical resistance at a temperature of 350° C. and at alternating current with a frequency of 50 Hz of greater than 1.0*10 6 Ohm·cm.

14. The electrical storage system as claimed in claim 1 , wherein the at least one sheet-type discrete element comprises a maximum load temperature θ Max of at least 300° C.

15. The electrical storage system as claimed in claim 1 , wherein the at least one sheet-type discrete element has a coefficient of linear thermal expansion α in a range from 2.0*10 −6 /K to 10*10 −6 /K.

16. The electrical storage system as claimed in claim 1 , wherein the at least one sheet-type discrete element further comprises a relationship of a product of a maximum load temperature (θ Max ) and a coefficient of linear thermal expansion (α) of 600·10 −6 ≤θ Max ·α≤8000·10 −6 .

17. The electrical storage system as claimed in claim 1 , wherein the at least one sheet-type discrete element further comprises a relationship of a product of a maximum load temperature (θ Max ) and a coefficient of linear thermal expansion (α) of 800·10 −6 ≤θ Max ·α≤5000·10 −6 .

18. A sheet-type discrete element made of toughened glass, comprising:
a composition that resists an attack of alkali metals or alkali metal ions comprising a TiO 2 content of at most 2 wt % and a compositional range selected from the group consisting of, in wt %:

Component
No. 1
No. 2

Assignees

• Schott Ag

Inventors

• Kunze Miriam
• Peuchert Ulrich
• Schultz Nikolaus
• Damm Thorsten
• Ottermann Clemens

Classifications

• H01M10/0585

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• C03C3/093

  containing zinc or zirconium · CPC title

• C03C3/095

  containing rare earths · CPC title

• H01M10/0436

  Small-sized flat cells or batteries for portable equipment · CPC title

• H01M2/0292

  Electricity · mapped topic