# US 10,873,087 B2 · Metal negative electrode secondary battery and method of manufacturing same

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- Number: US 10,873,087 B2
- Document ID: US10873087B2
- Status: Granted
- Kind: B2
- Application number: 16/058,463
- Filed: 2018-08-08
- Published: 2019-03-28
- Granted: 2020-12-22
- Earliest claimed: 2017-09-27
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Hideaki Oka
- Web page: https://patentgrep.com/patent/US10873087B2

## CPC

- H01M 4/625: {Carbon or graphite}
- H01M 4/0445: {Forming after manufacture of the electrode, e.g. first charge, cycling}
- H01M 4/0471: {involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis}
- H01M 4/049: {Manufacturing of an active layer by chemical means}
- H01M 4/134: Electrodes based on metals, Si or alloys
- H01M 4/1395: of electrodes based on metals, Si or alloys
- H01M 4/364: {as mixtures}
- H01M 4/366: {as layered products}
- H01M 4/405: {Alloys based on lithium}
- H01M 4/663: {containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres}
- H01M 10/052: Li-accumulators
- H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
- H01M 2004/027: {Negative electrodes}
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A metal negative electrode secondary battery at least includes a positive electrode, a negative electrode, and an electrolyte. The negative electrode at least includes a support and a first metal. The support at least includes a carbon particle. The carbon particle is provided with a plurality of open pores. The first metal is held in the open pores. The first metal is an alkali metal or an alkaline earth metal. The negative electrode is configured to exchange an electron through dissolution reaction and deposition reaction of the first metal.

## Claims

### Claim 1

A metal negative electrode secondary battery at least comprising a positive electrode, a negative electrode, and an electrolyte,
the negative electrode at least including a support and a first metal,
the support at least including a carbon particle, the carbon particle having a BET specific surface area of less than or equal to 50 m2/g,
the carbon particle being provided with a plurality of open pores,
the first metal being held in the open pores,
the first metal being an alkali metal or an alkaline earth metal,
the negative electrode being configured to exchange an electron through dissolution reaction and deposition reaction of the first metal.

### Claim 2 (depends on 1)

The metal negative electrode secondary battery according to claim 1, wherein
the support further includes a second metal,
the second metal is a metal to be alloyed with the first metal, and
the second metal is adhered to inner walls of the open pores.

### Claim 3 (depends on 2)

The metal negative electrode secondary battery according to claim 2, wherein
the first metal is lithium, and
the second metal is magnesium.

### Claim 4 (depends on 1)

The metal negative electrode secondary battery according to claim 1, wherein
the support further includes an ion-conductive polymer, and
the ion-conductive polymer coats an outer surface of the carbon particle.

### Claim 5 (depends on 4)

The metal negative electrode secondary battery according to claim 4, wherein the ion-conductive polymer comprises polyethylene oxide (PEO), polyvinyl alcohol (PVA), sulfonated tetrafluoroethylene-based fluoropolymer, vinylidene fluoride-hexafluoropropene copolymer (PVDF-HFP), polyacrylic acid (PAA), polymethyl methacrylate (PMMA), or a combination thereof.