Anode for sodium-ion and potassium-ion batteries

Patent metadata

Field	Value
Publication number	US-9742027-B2
Application number	US-201514656808-A
Country	US
Kind code	B2
Filing date	Mar 13, 2015
Priority date	Mar 28, 2012
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

A first method for fabricating an anode for use in sodium-ion and potassium-ion batteries includes mixing a conductive carbon material having a low surface area, a hard carbon material, and a binder material. A carbon-composite material is thus formed and coated on a conductive substrate. A second method for fabricating an anode for use in sodium-ion and potassium-ion batteries mixes a metal-containing material, a hard carbon material, and binder material. A carbon-composite material is thus formed and coated on a conductive substrate. A third method for fabricating an anode for use in sodium-ion and potassium-ion batteries provides a hard carbon material having a pyrolyzed polymer coating that is mixed with a binder material to form a carbon-composite material, which is coated on a conductive substrate. Descriptions of the anodes and batteries formed by the above-described methods are also provided.

First claim

We claim:

1. A sodium-ion or potassium-ion battery, the battery comprising:
a transition metal hexacyanometallate (TMHCM) cathode;
a non-aqueous electrolyte;
an anode comprising:
a conductive substrate;
a carbon-composite material overlying the conductive substrate comprising:
a hard carbon material;
a conductive carbon material having a low surface area;
a binder material;

wherein a carbon-composite material is defined herein as a mixture of two or more different materials, in which at least one material is a carbon material; and,

an ion-permeable membrane separating the anode from the cathode.

2. A sodium-ion or potassium-ion battery, the battery comprising:
a transition metal hexacyanometallate (TMHCM) cathode;
a non-aqueous electrolyte;
an anode comprising:
a conductive substrate;
a carbon-composite material overlying the conductive substrate comprising:
a hard carbon material;
a metal-containing material;
a binder material;

wherein a carbon-composite material is defined herein as a mixture of two or more different materials, in which at least one material is a carbon material; and,

an ion-permeable membrane separating the anode from the cathode.

3. A sodium-ion or potassium-ion battery, the battery comprising:
a transition metal hexacyanometallate (TMHCM) cathode;
a non-aqueous electrolyte;
an anode comprising:
a conductive substrate;
a carbon-composite material overlying the conductive substrate comprising a hard carbon material with a pyrolyzed polymer coating;
a binder material;
wherein a carbon-composite material is defined herein as a mixture of two or more different materials, in which at least one material is a carbon material; and,

an ion-permeable membrane separating the anode from the cathode.

4. A sodium-ion or potassium-ion battery, the battery comprising:
a transition metal hexacyanometallate (TMHCM) cathode;
a non-aqueous electrolyte;
an anode comprising:
a conductive substrate;
a carbon-composite material overlying the conductive substrate comprising:
a hard carbon material;
a metal-containing material, excluding materials capable of forming an alloy with sodium and potassium, wherein an alloy is defined as a substance composed of two or more metals, or of a metal or metals with a nonmetal;
a binder material;

wherein a carbon-composite material is defined herein as a mixture of two or more different materials, in which at least one material is a carbon material; and,

an ion-permeable membrane separating the anode from the cathode.

Assignees

• Sharp Laboratories America Inc

Inventors

• Vail Sean
• Lu Yuhao
• Wang Long
• Nishijima Motoaki
• Lee Jong-Jan

Classifications

• H01M4/0471

  involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis · CPC title

• H01M4/587

  for inserting or intercalating light metals · CPC title

• C01C3/11

  Complex cyanides · CPC title

• H01M4/622

  being polymers · CPC title

• H01M10/054 Primary

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