Electrode, electrochemical energy accumulator with an electrode, and method for producing an electrode

Patent metadata

Field	Value
Publication number	US-10897041-B2
Application number	US-201716319150-A
Country	US
Kind code	B2
Filing date	Jul 6, 2017
Priority date	Jul 21, 2016
Publication date	Jan 19, 2021
Grant date	Jan 19, 2021

Abstract

An electrode for an electrochemical energy accumulator includes a catalyst layer, where the catalyst layer includes an electrically conductive matrix and a chemically active material which is intercalated into the electrically conductive matrix. A protective coating is disposed on the catalyst layer, where the protective coating includes at least one metal oxide and methionine.

First claim

The invention claimed is:

1. An electrode for an electrochemical energy accumulator, comprising:
an active material layer, wherein the active material layer comprises:
an electrically conductive matrix; and
a chemically active material which is intercalated into the electrically conductive matrix; and
a protective coating disposed on the active material layer, wherein the protective coating comprises at least one metal oxide and methionine;
wherein the protective coating is formed in two layers including a methionine layer containing the methionine and a metal oxide layer containing the at least one metal oxide.

2. The electrode according to claim 1 , wherein the protective coating completely encloses the catalyst active material layer.

3. The electrode according to claim 1 , wherein the methionine layer is deposited on the catalyst active material layer.

4. The electrode according to claim 1 , wherein the metal oxide layer is deposited on the methionine layer.

5. The electrode according to claim 1 , wherein the metal oxide layer is an aluminum oxide layer.

6. An electrochemical energy accumulator, comprising:
an electrode according to claim 1 ;
a counter electrode; and
an electrolyte disposed between the electrode and the counter electrode.

7. The electrochemical energy accumulator according to claim 6 , wherein the electrode is a cathode and wherein the counter electrode is an anode.

8. A method for producing the electrode according to claim 1 , comprising the steps of:
intercalating the chemically active material into the electrically conductive matrix to form the active material layer;
disposing the protective coating on the active material layer;
applying the active material layer to a substrate;
providing of the methionine in powder form;
providing a metal-containing precursor compound and a counter compound;
forming a methionine layer by depositing the powder methionine on the active material layer; and
forming a metal oxide layer by depositing at least one layer of the metal-containing precursor compound on the methionine layer and thereafter applying the counter compound to the deposited metal-containing precursor compound.

Assignees

• Daimler Ag

Inventors

• Hintennach Andreas

Classifications

• H01M4/136 Primary

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

• H01M4/1397

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

• H01M4/045

  Electrochemical coating; Electrochemical impregnation · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M4/5815

  Sulfides · CPC title