Non-aqueous electrolyte magnesium secondary battery

Patent metadata

Field	Value
Publication number	US-10998574-B2
Application number	US-201515517349-A
Country	US
Kind code	B2
Filing date	Oct 8, 2015
Priority date	Oct 8, 2014
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

This invention provides a non-aqueous electrolyte magnesium secondary battery comprising a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte, the non-aqueous electrolyte comprising [N(SO2CF3)2]− as an anion, and Mg2+ and/or an organic onium cation as a cation.

First claim

The invention claimed is:

1. A non-aqueous electrolyte magnesium secondary battery comprising a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte,
wherein the non-aqueous electrolyte consists of Mg[N(SO 2 CF 3 ) 2 ] 2 as an electrolyte salt and an ionic liquid as a solvent,
wherein the ionic liquid consists of [N(SO 2 CF 3 ) 2 ] − as an anion and an organic onium cation as a cation,
wherein the organic onium cation is at least one cation selected from the group consisting of tetramethylammonium (N 1111 ), tetraethylammonium (N 2222 ), tetra n-propylammonium (N 3333 ), tetra n-butylammonium (N 4444 ), tetra n-pentylammonium (N 5555 ), and 5-azoniaspiro[4.4]nonane (AS 44 ).

2. The non-aqueous electrolyte magnesium secondary battery according to claim 1 , wherein the negative electrode comprises a negative electrode active material selected from the group consisting of a metal magnesium, a magnesium alloy material, a carbon material, a composite material of metal magnesium, and a composite material of a magnesium alloy with a carbon material.

3. The non-aqueous electrolyte magnesium secondary battery according to claim 1 , wherein the positive electrode comprises a positive active material, and the positive active material is a material in which magnesium ions undergo an insertion/extraction reaction.

4. The non-aqueous electrolyte magnesium secondary battery according to claim 3 , wherein the material in which magnesium ions undergo an insertion/extraction reaction is at least one material selected from the group consisting of a metal sulfide free from magnesium, a metal oxide free from magnesium, an oxide obtained by removing Li from a Li-containing composite oxide and replacing the Li with an Mg ion, a Chevrel material, a polyanion material, a silicate material, a magnesium nitride, an organic positive-electrode material, a compound containing a transition metal and fluorine, and a halogenated compound.

5. The non-aqueous electrolyte magnesium secondary battery according to claim 3 , wherein the material in which magnesium ions undergo an insertion/extraction reaction is at least one material selected from the group consisting of TiS 2 , MoS 2 , NbSe 2 , CoS, V 2 O 5 , V 8 O 13 , MnO 2 , CoO 2 , MgMn 2 O 4 , MgAlO 3 , MgMnO 3 , MgFeO 3 MgFe 0.5 Mn 0.5 O 3 , MgFe 0.9 Al 0.1 O 3 , MgMn 0.9 Al 0.1 O 3 , Mg 0.5 Mn 0.9 Al 0.1 O 2 , Mo 6 S 8 , MxMo 6 S 8 (M=Cu, Ni, Ag, a transition metal, 0≤x≤2), Cu 0.13 Mg 1.09-1.12 Mo 6 S 8 , MgHf(MoO 4 ) 3 , Mg 0.5 Hf 0.5 Sc 1.0 (MoO 4 ) 3 , Mg 0.2 Zr 0.2 Sc 1.6 (WO 4 ) 3 , Mg 0.4 Zr 0.4 Sc 1.2 (WO 4 ) 3 , Mg 0.6 Zr 0.6 Sc 1.2 (WO 4 3 , Mg 0.8 Zr 0.8 Sc 0.4 (WO 4 ) 3 , MgZr(WO 4 ) 3 , MgCoSiO 4 , MgFeSiO 4 , MgNiSiO 4 , Mg(Ni 0.9 Mn 0.1 ) SiO 4 , MgFe 0.9 Si 0.1 O 3 , MgFe 0.5 Si 0.5 O 3 , MgFe 0.1 Si 0.9 O 3 , Mg 1.023 (Mn 0.956 V 0.014 )SiO 4 , FeF 2.8 Cl 0.2 MgCOSiO 4 , MgMn 0.9 Si 0.1 O 3 , Mg 0.9925 (Co 0.985 V 0.015 )SiO 4 , Mg 0.959 (Fe 0.918 V 0.082 ) SiO 4 , Mg 0.95 (Ni 0.9 V 0.100 ) SiO 4 , magnesium nitride, magnesium porphyrin, a polythiophene, FeF 3 , and MnF 3 .

6. The non-aqueous electrolyte magnesium secondary battery according to claim 1 , wherein the organic onium cation is tetraethylammonium (N 2222 ) or 5-azoniaspiro[4.4]nonane (AS 44 ).

Assignees

• Aist

Inventors

• Kubota Keigo
• Teramoto Kenichi
• Ooyabu Rie
• Matsumoto Hajime

Classifications

• H01M10/0568 Primary

  characterised by the solutes · CPC title

• H01M10/054 Primary

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

• H01M4/587

  for inserting or intercalating light metals · CPC title

• H01M4/466

  Magnesium based · CPC title

• H01M4/381

  Alkaline or alkaline earth metals elements (H01M4/40 takes precedence) · CPC title