Non-aqueous electrolyte and battery

Patent metadata

Field	Value
Publication number	US-9627714-B2
Application number	US-201214349538-A
Country	US
Kind code	B2
Filing date	Oct 3, 2012
Priority date	Oct 4, 2011
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

A non-aqueous electrolyte including (i) a compound represented by the general formula (1):

X—R—SO 2 F  (1)

where R is a C 1-12 linear or branched alkylene group optionally containing an ether bond and optionally hydrogen atoms of the alkylene group are partly substituted by a fluorine atom(s); and X is a carboxylic acid derivative group), (ii) a non-aqueous solvent and (iii) an electrolyte salt.

First claim

The invention claimed is:

1. A non-aqueous electrolyte comprising:
(i) a compound represented by the general formula (1):
X—R—SO 2 F  (1)

(where R is a C 1-12 linear or branched alkylene group optionally containing an ether bond and optionally hydrogen atoms of the alkylene group are partly substituted by a fluorine atom(s); and X is a carboxylic acid derivative group);
(ii) a non-aqueous solvent; and
(iii) an electrolyte salt;
wherein X is —CONH 2 , —CN, —CON(CH 3 ) 2 or —CON(C 2 H 5 ) 2 , and
wherein the non-aqueous electrolyte contains the compound (i) at 0.01 to 20% by volume.

2. The non-aqueous electrolyte according to claim 1 , wherein the non-aqueous solvent (ii) is at least one fluorine solvent selected from the group consisting of a fluorine-containing cyclic carbonate, a fluorine-containing linear carbonate and a fluorine-containing ether.

3. The non-aqueous electrolyte according to claim 1 , wherein R is a fluorine-containing alkylene group optionally containing an ether bond.

4. The non-aqueous electrolyte according to claim 1 , wherein R is a perfluoroalkylene group optionally containing an ether bond.

5. A battery comprising a positive electrode, a negative electrode and the non-aqueous electrolyte according to claim 1 .

6. The battery according to claim 5 , wherein
the positive electrode contains, as a positive electrode active material, a lithium transition metal oxide represented by the following formula (2-1):
Li a M 1 2−(a+b) M 2 b O 2   (2-1)

(where M 1 is Mn, Ni, V, Co, or Fe; M 2 is at least one selected from the group consisting of Fe, Co, Ni, Mn, Mg, Cu, Zn, Al, Sn, B, Ga, Cr, V, Sr, Ca, In, Si, Ge and Ti; provided that 0.4≦a≦1.2 and 0≦b≦0.6, and M 1 and M 2 are different).

7. The battery according to claim 6 , having a charging voltage of 4.30 V to 5.0 V.

Assignees

• Daikin Ind Ltd

Inventors

• Koh Meiten
• Nakazono Aoi
• Taeda Mayuko
• Yamauchi Akiyoshi

Classifications

• H01M4/485

  of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title

• H01M10/0569

  characterised by the solvents · CPC title

• H01M10/0567 Primary

  characterised by the additives · CPC title

• H01M4/5825

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

• H01M10/052

  Li-accumulators · CPC title