Additive for electrolytes

Patent metadata

Field	Value
Publication number	US-11239496-B2
Application number	US-201716091811-A
Country	US
Kind code	B2
Filing date	Apr 5, 2017
Priority date	Apr 6, 2016
Publication date	Feb 1, 2022
Grant date	Feb 1, 2022

Abstract

There is provided a use, in an electrolyte for a battery, of an additive which comprises at least one organocatalyst. Also, there is provided a method of preventing the contact between the anode and residual water in a battery and/or reducing the level of gas in a battery. Moreover, there is provided electrolyte for a battery, comprising an additive which comprises at least one organocatalyst. Moreover, there is provided a battery comprising an electrolyte which comprises an additive which comprises at least one organocatalyst.

First claim

The invention claimed is:

1. An electrolyte for a battery, comprising an additive which comprises
at least one organocatalyst, and
a solvent, the solvent consisting essentially of one or more carbonates having a general formula I below:

wherein R is a C 1 -C 12 linear, branched or cyclic alkyl group, and n is an integer from 1 to 6;
wherein the organocatalyst comprises 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU); and
wherein DBU is present in an amount of about 0.5% or less.

2. An electrolyte according to claim 1 , wherein the electrolyte further comprises a salt selected from the group consisting of LiPF 6 , LiFSI, LiTFSI, LiBOB, LiBF 4 and a combination thereof.

3. An electrolyte according to claim 1 , wherein the amount of organocatalyst in the electrolyte is about 0.5% or less.

4. An electrolyte according to claim 1 , wherein the solvent is propylene carbonate.

5. An electrolyte according to claim 1 , wherein the organocatalyst consists of DBU.

6. A battery comprising an electrolyte as defined in claim 1 , an anode, and a cathode.

7. A battery according to claim 6 , wherein the cathode of the battery is based on LiMPO 4 where M is Fe, Co, Ni or Mn, or the cathode is a high energy cathode.

Assignees

• Hydro Quebec
• Murata Manufacturing Co

Inventors

• Daigle Jean-Christophe
• Uesaka Shinichi
• Asakawa Yuichiro
• Zaghib Karim

Classifications

• H01M10/052

  Li-accumulators · CPC title

• H01M4/5825

  Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines · CPC title

• H01M10/0567 Primary

  characterised by the additives · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M2004/027

  Negative electrodes · CPC title