Magnesium sulfide material, magnesium sulfide composite material, positive electrode member for secondary batteries, wide band gap semiconductor material, magnesium secondary battery, and method for producing zinc blende magnesium sulfide

Patent metadata

Field	Value
Publication number	US-11394027-B2
Application number	US-201916720963-A
Country	US
Kind code	B2
Filing date	Dec 19, 2019
Priority date	Jun 21, 2017
Publication date	Jul 19, 2022
Grant date	Jul 19, 2022

Abstract

Provided is a magnesium secondary battery including a positive electrode member 23 including at least a positive electrode active material layer 23B, a separator 24 disposed facing the positive electrode member 23, a negative electrode member 25 containing magnesium or a magnesium compound disposed facing the separator 24, and an electrolytic solution containing a magnesium salt. The positive electrode active material layer 23B includes magnesium sulfide having a zinc blende type crystal structure.

First claim

The invention claimed is:

1. A magnesium secondary battery comprising:
a positive electrode member including at least a positive electrode active material layer, wherein the positive electrode active material layer comprises a magnesium sulfide having a zinc blende type structure, the magnesium sulfide comprising an amorphous magnesium sulfide or a mixture containing a plurality of crystallites comprising the magnesium sulfide having a zinc blende type crystal structure in the amorphous magnesium sulfide;
a separator disposed facing the positive electrode member;
a negative electrode member containing magnesium or a magnesium compound disposed facing the separator; and
an electrolytic solution comprising a solvent comprising a sulfone comprising ethyl-n-propylsulfone and a magnesium salt dissolved in the solvent, wherein the magnesium salt includes a magnesium chloride.

2. The magnesium secondary battery according to claim 1 , wherein the crystallites have a particle size of 20 nm.

3. The magnesium secondary battery according to claim 1 , wherein the positive electrode member includes a positive electrode current collector and the positive electrode active material layer formed on the positive electrode current collector.

Assignees

• Murata Manufacturing Co

Inventors

• Kamiguchi Kazuhiro
• Matsumoto Ryuhei
• Kumagae Kiyoshi
• Hosoi Shizuka
• Nakayama Yuri

Classifications

• H01M10/0568

  characterised by the solutes · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · 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

• H01M10/054

  Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium · CPC title

• H01M10/24

  Alkaline accumulators · CPC title