# US 10,374,229 B2 · Positive electrode active material for alkali-ion secondary batteries

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- Number: US 10,374,229 B2
- Document ID: US10374229B2
- Status: Granted
- Kind: B2
- Application number: 15/553,359
- Filed: 2016-02-17
- Published: 2018-05-17
- Granted: 2019-08-06
- Earliest claimed: 2015-02-25
- Assignees: National University Corporation Nagaoka University of Technology; Nippon Electric Glass Co., Ltd.
- Applicants: National University Corporation Nagaoka University of Technology; Nippon Electric Glass Co., Ltd.
- Inventors: Tsuyoshi Honma; Takayuki Komatsu; Satoshi Nakata; Hideo Yamauchi; Fumio Sato
- Web page: https://patentgrep.com/patent/US10374229B2

## CPC

- H01M 4/381: {Alkaline or alkaline earth metals elements (H01M4/40 takes precedence)}
- H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
- H01M 4/364: {as mixtures}
- H01M 4/485: of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence)
- H01M 4/505: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
- H01M 4/525: of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/48: Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569)
- H01M 2004/028: {Positive electrodes}
- Y02E 60/10: Energy storage using batteries
- 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

## Abstract

A positive electrode active material for alkali-ion secondary batteries is provided which contains 20-55% of Na2O+Li2O, 10-60% of CrO+FeO+MnO+CoO+NiO, and 20-55% of P2O5+SiO2+B2O3 in terms of oxide-equivalent mol % and includes 50 mass % or more of an amorphous phase. According to the present invention, it is possible to provide a positive electrode active material for alkali-ion secondary batteries that enables high energy density and is excellent in the charge and discharge characteristics.

## Claims

### Claim 1

A positive electrode active material for alkali-ion secondary batteries, comprising: 20-55% of Na2O; 10-60% of MnO; and 20-55% of P2O5+SiO2+B2O3 in terms of oxide-equivalent mol %, wherein the positive electrode active material comprises 50 mass % or more of an amorphous phase.

### Claim 2 (depends on 1)

The positive electrode active material for alkali-ion secondary batteries according to claim 1, comprising: 20-55% of Na2O; 10-60% of MnO; and 20-55% of P2O5 in terms of oxide-equivalent mol %.