Crystalline, completely soluble lithium bis(oxalato)borate (LiBOB)

Patent metadata

Field	Value
Publication number	US-8946452-B2
Application number	US-201313737617-A
Country	US
Kind code	B2
Filing date	Jan 9, 2013
Priority date	Jul 4, 2007
Publication date	Feb 3, 2015
Grant date	Feb 3, 2015

Abstract

A crystalline, completely soluble lithium bis(oxalato)horate (LiBOB), to a method for producing the same and to the use of the lithium bis(oxalato)borate.

First claim

The invention claimed is:

1. LiBOB that it is coarsely crystalline and completely soluble present as a LiBOB•(n 5-membered ring ester) complex, wherein n is between 0.01 and 3, wherein the turbidity of a 15% solution of the LiBOB in acetonitrile is at most 100 NTU.

2. LiBOB according to claim 1 , wherein the 5-membered ring ester is at least one member selected from the group consisting of a 1,3-dioxolan-2-one compound and a γ-lactone.

3. LiBOB according to claim 2 , wherein the 1,3-dioxolan-2-one compound is selected from the group consisting of 1,3-dioxolan-2-one, 4-methyl-1,3-dioxolan-2-one and 4-ethyl-1,3-dioxolan-2-one.

4. LiBOB according to claim 2 , wherein γ-lactone is selected from the group consisting of γ-butyrolactone and γ-valerolactone.

5. LiBOB according to claim 1 , wherein a median of the largest diameter of primary crystallites of the LiBOB is 50 μm to 5 mm.

6. LiBOB according to claim 1 , wherein less than 20 wt. % of the LiBOB is below half a length of the median of the largest diameter of primary crystallites of the LiBOB.

7. LiBOB according to claim 1 , wherein the LiBOB has a volume of primary crystallites, wherein the volume of primary crystallites of the LiBOB is between 0.01 and 100 mm 3 .

8. LiBOB according to claim 1 , wherein the LiBOB has a dust content below 10 wt. %.

9. LiBOB according to claim 7 , wherein the LiBOB has a dust content below 10 wt. %.

10. LiBOB according to claim 1 , wherein the LiBOB is free from organic substances other than a 1,3-dioxolan-2-one compound or a γ-lactone.

11. An electrolyte for a galvanic element comprising the LiBOB•(n 5-membered ring ester) complex of claim 1 .

12. A LiBOB that is present as a LiBOB•(n 5-membered ring ester) complex, wherein n is between 0.01 and 3.44, wherein the LiBOB is coarsely crystalline and completely soluble present as a wherein turbidity of a 15% solution of the LiBOB in acetonitrile is at most 100 NTU and wherein the LiBOB is free from organic substances other than a 1,3-dioxolan-2-one compound or a γ-lactone.

Assignees

• Chemetall Gmbh

Inventors

• Dietz Rainer
• Wietelmann Ulrich
• Lischka Uwe
• Buhrmester Thorsten
• Schade Klaus

Classifications

• H01M10/0568

  characterised by the solutes · CPC title

• C07F5/022 Primary

  without C-boron linkages · CPC title

• H01M10/0564 Primary

  the electrolyte being constituted of organic materials only · CPC title

• H01M10/0569

  characterised by the solvents · CPC title

• H01M2300/0017

  Non-aqueous electrolytes · CPC title