Metal cyanometallates

Patent metadata

Field	Value
Publication number	US-9966602-B2
Application number	US-201615279588-A
Country	US
Kind code	B2
Filing date	Sep 29, 2016
Priority date	Mar 28, 2012
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

Methods are presented for synthesizing metal cyanometallate (MCM). A first method provides a first solution of A X M2 Y (CN) Z , to which a second solution including M1 is dropwise added. As a result, a precipitate is formed of A N M1 P M2 Q (CN) R . F H 2 O, where N is in the range of 1 to 4. A second method for synthesizing MCM provides a first solution of M2 C (CN) B , which is dropwise added to a second solution including M1. As a result, a precipitate is formed of M1[M2 S (CN) G ] 1/T . D H 2 O, where S/T is greater than or equal to 0.8. Low vacancy MCM materials are also presented.

First claim

We claim:

1. A metal cyanometallate (MCM) material, prior to fabrication in a battery electrode, comprising:
A N M1 P M2 Q (CN) R . F H 2 O;
where A is an alkaline earth metal;
where M1 and M2 are metals selected from the group consisting of transition metals, tin (Sn), indium (In), calcium (Ca), magnesium (Mg), strontium (Sr), and barium (Ba);
where N is in a range of greater than 0.5 to 1;
where P is less than or equal to 2;
where F is in a range of 0 to 20;
where Q is less than or equal to 2; and,
where R is less than or equal to 6.

2. The MCM material of claim 1 wherein the alkaline earth metal is selected from the group consisting of calcium (Ca), strontium (Sr), barium (Ba), magnesium (Mg), and combinations thereof.

3. The MCM material of claim 1 where M1 and M2 are metals selected from the group consisting of titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), niobium (Nb), and ruthenium (Ru).

4. The MCM material of claim 1 wherein M1 is Mn; and,
wherein M2 is Fe.

5. A metal cyanometallate (MCM) powder, prior to exposure to an electrochemical stimulus, comprising:
A N M1 P M2 Q (CN) R . F H 2 O;
where A is an alkaline earth metal;
where M1 and M2 are metals selected from the group consisting of transition metals, tin (Sn), indium (In), calcium (Ca), magnesium (Mg), strontium (Sr), and barium (Ba);
where N is in a range of greater than 0.5 to 1;
where P is less than or equal to 2;
where F is in a range of 0 to 20;
where Q is less than or equal to 2; and,
where R is less than or equal to 6.

6. The MCM powder of claim 5 wherein the alkaline earth metal is selected from the group consisting of calcium (Ca), strontium (Sr), barium (Ba), magnesium (Mg), and combinations thereof.

7. The MCM powder of claim 5 where M1 and M2 are metals selected from the group consisting of titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), zinc (Zn), niobium (Nb), and ruthenium (Ru).

8. The MCM powder of claim 5 wherein M1 is Mn; and,
wherein M2 is Fe.

Assignees

• Sharp Laboratories America Inc

Inventors

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

Classifications

• C01P2002/50

  Solid solutions · CPC title

• C01C3/11

  Complex cyanides · CPC title

• H01M4/58 Primary

  of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates · CPC title

• C01C3/12

  Simple or complex iron cyanides · CPC title

• C01P2006/40

  Electric properties · CPC title