Battery

Patent metadata

Field	Value
Publication number	US-10916956-B2
Application number	US-201916710878-A
Country	US
Kind code	B2
Filing date	Dec 11, 2019
Priority date	Oct 2, 2008
Publication date	Feb 9, 2021
Grant date	Feb 9, 2021

Abstract

A battery includes an anode having an alkali metal as the active material, a cathode having, for example, iron disulfide as the active material, and an increased electrolyte volume.

First claim

What is claimed is:

1. A battery, comprising a housing, and within the housing:
(a) an anode comprising an alkali metal;
(b) a cathode comprising a mass (m) of a cathode active material selected from the group consisting of transition metal polysulfides having the formula M1 a M2 b S n , wherein M1 and M2 are transition metals, a+b is at least 1, and n is at least 2(a+b); and
(c) a volume (v) of an electrolyte,
wherein the ratio v/m is at least 0.33 to at most 0.55 ml/g.

2. The battery of claim 1 , wherein the mass (m) is at least 4.5 g.

3. The battery of claim 1 , wherein the cathode has a porosity of at most 35%.

4. The battery of claim 1 , wherein the volume (v) of electrolyte is at least 1.4 ml and at most 2.2 ml.

5. The battery of claim 1 , wherein the alkali metal is lithium.

6. The battery of claim 5 , wherein the lithium is alloyed with aluminum.

7. The battery of claim 5 , wherein the lithium metal is not alloyed with another metal.

8. The battery of claim 1 , wherein the cathode further comprises a material selected from CuS, Cu 2 S, FeS, CuO, Bi 2 O 3 and combinations thereof.

9. The battery of claim 1 , wherein the cathode active material comprises one or more materials selected from FeS 2 , CoS 2 , NiS 2 , MoS 2 , Co 2 S 9 , Co 2 S 7 , Ni 2 S 7 , Fe 2 S 7 , Mo 2 S 3 , NiCoS 7 , and combinations thereof.

10. The battery of claim 1 , wherein the cathode active material is FeS 2 .

11. The battery of claim 1 , wherein the alkali metal is lithium, the cathode active material is iron disulfide.

12. The battery of claim 1 , wherein the electrolyte further comprises a lithium salt.

13. The battery of claim 1 , wherein the battery is a primary battery.

14. A method of using a battery, comprising:
discharging but not recharging a battery comprising a housing, and within the housing:
(a) an anode comprising an alkali metal;
(b) a cathode comprising a mass (m) of a cathode active material selected from the group consisting of transition metal polysulfides having the formula M1 a M2 b S n , wherein M1 and M2 are transition metals, a+b is at least 1, and n is at least 2(a+b); and
(c) a volume (v) of an electrolyte;
wherein the ratio v/m is at least 0.33 to at most 0.55 ml/g.

Assignees

• Duracell Us Operations Inc

Inventors

• Pozin Michael
• Berkowitz Fred J
• Specht Steven J
• Kouznetsova Yelena
• Patel Bhupendra K
• Zhao Yang
• Chang Haitao

Classifications

• H02J7/855

  with circuits adapted for supplying loads from the battery · CPC title

• H01M50/609

  Arrangements or processes for filling with liquid, e.g. electrolytes · CPC title

• H01M4/136 Primary

  Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy · CPC title

• H01M50/60

  Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings · CPC title

• H01M6/18

  with solid electrolyte · CPC title