Cathode, Cathode-Containing Lithium Ion Battery in the State Prior to the First Charging Process, Method for Forming a Lithium Ion Battery, and Lithium Ion Battery After Formation

Patent metadata

Field	Value
Publication number	US-2017194625-A1
Application number	US-201715467080-A
Country	US
Kind code	A1
Filing date	Mar 23, 2017
Priority date	Sep 25, 2014
Publication date	Jul 6, 2017
Grant date	—

Abstract

A cathode in a state prior to a first charging process is provided having an active cathode material and lithium peroxide. A lithium ion battery or an electrochemical cell includes the same cathode. A method is also provided for forming a lithium ion battery, and a lithium ion battery is provided which includes a cathode having an active cathode material, a separator, an anode having an active anode material, and an electrolyte, wherein after a formed cell is fully discharged, the active cathode material holds the same lithium content as before the formation process.

First claim

What is claimed is:

1 . A cathode in a state prior to a first charging process or formation, comprising:
an active cathode material and lithium peroxide.

2 . The cathode according to claim 1 , wherein the active cathode material and the lithium peroxide have been mixed.

3 . The cathode according to claim 1 , wherein the active cathode material is selected from the group consisting of: lithium-metal oxide, layered oxides, spinels, olivine compounds, silicate compounds, high energy lithium nickel cobalt manganese, and mixtures thereof.

4 . The cathode according to claim 1 , wherein the proportion of lithium peroxide based on the lithium content of the active cathode material is from 1 to 60 mol %.

5 . The cathode according to claim 2 , wherein the mixture further comprises a binder and electrical conductivity additive.

6 . A lithium ion battery in a state prior to a first charging process or formation, comprising:
a cathode in a state prior to a first charging process or formation, having an active cathode material and lithium peroxide; a separator; an anode; and an electrolyte.

7 . The lithium ion battery according to claim 6 , wherein the anode comprises an active anode material selected from the group consisting of: carbon, graphite, mixtures of silicon and carbon/graphite, silicon, lithium-metal oxide, materials which are able to be alloyed with lithium, and mixtures thereof.

8 . The lithium ion battery according to claim 6 , wherein the amount of lithium peroxide present is such that the expected formation loss is compensated at least partly on a cell level.

9 . The lithium ion battery according to claim 6 , wherein the amount of lithium peroxide present is such that the expected formation loss is compensated substantially completely on a cell level.

10 . The lithium ion battery according to claim 6 , wherein the electrolyte contains at least one constituent which is decomposed during formation and contributes to buildup of an insoluble solid boundary protection layer on the anode.

11 . A process for forming a lithium ion battery, the process comprising the steps of:
providing a lithium ion battery comprising: a cathode in a state prior to a first charging process or formation having an active cathode material and lithium peroxide, a separator, an anode, and an electrolyte; and carrying out at least one first charging operation to the maximum operating voltage of the lithium ion battery with a decomposition of the lithium peroxide.

12 . A lithium ion battery comprising:
a cathode comprising an active cathode material; a separator; an anode comprising an active anode material; and an electrolyte, wherein after discharging, the active cathode material holds the same lithium content as before formation.

13 . The lithium ion battery according to claim 12 , wherein the active cathode material is selected from the group consisting of: lithium-metal oxide, layered oxides, spinels, olivine compounds, silicate compounds, high energy lithium nickel cobalt manganese, and mixtures thereof.

14 . The lithium ion battery according claim 12 , wherein the active anode material is selected from the group consisting of: carbon, graphite, mixtures of silicon and carbon, silicon, lithium-metal oxide, materials which are able to be alloyed with lithium, and mixtures thereof.

15 . A lithium ion battery produced by the process according to claim 11 , wherein the lithium ion battery comprises a cathode comprising an active cathode material; a separator; an anode comprising an active anode material; and an electrolyte, and wherein after discharging, the active cathode material holds the same lithium content as before formation.

16 . The lithium ion battery according to claim 6 , wherein the active cathode material and the lithium peroxide have been mixed.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Woehrle Thomas
• Hain Holger
• Ogihara Hideki
• Langer Thorsten

Classifications

• H01M2004/028

  Positive electrodes · CPC title

• H01M4/1391

  of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M4/0447 Primary

  of complete cells or cells stacks · CPC title

• H01M4/525

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title