Surface-modified cyanide-based transition metal compounds

Patent metadata

Field	Value
Publication number	US-2020002181-A1
Application number	US-201916569216-A
Country	US
Kind code	A1
Filing date	Sep 12, 2019
Priority date	Jun 30, 2015
Publication date	Jan 2, 2020
Grant date	—

Abstract

A system, method, and articles of manufacture for a surface-modified transition metal cyanide coordination compound (TMCCC) composition, an improved electrode including the composition, and a manufacturing method for the composition which may include multiple chelation species (Che x). The composition, compound, device, and uses thereof according to AxMn(y-k)Mjk[Mnm(CN)(6-p-q)(NC)p(Che_I)rq]z. CHE_GROUP (Vac)(1-z).nH2O, wherein CHE_GROUP includes one or more chelation materials selected from the group consisting of (Che_I)rw, (Che_II)sv, and combinations thereof, and wherein 0<j≤4, 0≤k≤0.1, 0≤(p+q)≤6, 0<x≤4, 0<y≤1, 0<z≤1, 0<w≤0.2; −3≤r≤3; 0<v≤0.2; −3≤s≤3; and 0≤n≤6; wherein x+2(y−k)+jk+(m+(r+1)q−6)z+wr+vs=0.

First claim

What is claimed as new and desired to be protected by Letters Patent of the United States is:

1 . An electrochemical cell, comprising:
an anode; a cathode; and an electrolyte; wherein said anode includes a current collector having a surface; and a composite coupled to said surface, said composite including an electrochemically active material having a composition, a binder, and an electrically conductive material, wherein said composition comprises at least one composition represented by Formula II: A x Mn (y-k) M j k [Mn m (CN) (6-p-q) (NC) p (Che_I) r q ] z . CHE_GROUP (Vac) (1-z) .nH 2 O, wherein CHE_GROUP includes one or more chelation materials selected from the group consisting of (Che_I) r w , (Che_II) s v , wherein Che_I includes a first chelation species and Che_II includes a second chelation species, said second chelation species including one or more chemical species selected from the group including a first material including said first chelation species, a second material excluding said first chelation species, and combinations thereof, and combinations thereof: wherein, in Formula II, each A is an independently selected alkali metal Li, Na, or K; and each dopant M may optionally be at least one independently selected alkaline earth metal Mg or Ca, post-transition metal Al, Ga, In, Sn, or Pb, or transition metal Sc, Ti, V, Cr, Fe, Co, Ni, Cu, Zn, Pd, Ag, or Cd having an average valence j; and Che represents an acid chelating agent which includes ligand binding atoms that form one or more covalent linkages with Mn or with Mn and M; and wherein 0<j≤4, 0≤k≤0.1, 0≤(p+q)≤6, 0<x≤4, 0<y≤1, 0<z≤1, 0<w≤0.2; −3≤r≤3; 0<v≤0.2; −3≤s≤3; and 0≤n≤6; wherein x+2(y−k)+jk+(m+(r+1)q−6)z+wr+vs=0; and wherein Formula II includes one or more Mn(CN) (6-p-q) (NC) p (Che_I) r q complexes each including an Mn atom, and wherein p is an average number of NC groups found in said one or more Mn(CN) (6-p-q) (NC) p (Che_I) r q complexes; and wherein q is an average number of Che_I groups found in said one or more Mn(CN) (6-p-q) (NC) p (Che_I) r q complexes; and wherein m is an average valence of said Mn atoms found in said one or more Mn(CN) (6-p-q) (NC) p (Che_I) r q complexes; wherein (Vac) identifies a Mn(CN) (6-p-q) (NC) p (Che_I) r q vacancy; wherein CN identifies a cyano group; and wherein NC identifies an isocyano group.

2 . The electrochemical cell of claim 1 wherein at least one of said chelation species comprises an organic acid.

3 . The electrochemical cell of claim 2 wherein said organic acid comprises a compound containing a carboxylate group.

4 . The electrochemical cell of claim 3 wherein said compound comprises one or more of acetic acid, formic acid, oxalic acid, gluconic acid, succinic acid, lactic acid, citric acid, sodium glycinate, or sodium oxalate.

5 . The electrochemical cell of claim 1 wherein said organic acid comprises a compound containing an acid of an amine.

6 . The electrochemical cell of claim 5 wherein said compound comprises EDTA.

7 . The electrochemical cell of claim 1 wherein said organic acid comprises a compound containing a phosphonic acid group.

8 . The electrochemical cell of claim 7 wherein said compound comprises HEDP.

9 . The electrochemical cell of claim 1 wherein said anode includes a specific capacity greater than 60 mAh/g of active material.

10 . The electrochemical cell of claim 9 wherein said specific capacity is greater than 67 mAh/g of active material.

11 . The electrochemical cell of claim 1 wherein said anode includes an open circuit potential more negative than −0.2 V versus an Ag/AgCl reference electrode.

12 . The electrochemical cell of claim 11 wherein said anode includes an open circuit potential more negative than −0.3 V versus an Ag/AgCl reference electrode.

13 . The electrochemical cell of claim 1 wherein said composite further includes an additive.

14 . The electrochemical cell of claim 1 wherein said binder includes one or more components selected from the group consisting of vinylfluoride/hexafluoropropylene copolymer, polyvinylidenefluoride (PVDF), polyacrylonitrile, polymethylmethacrylate, polytetrafluoroethylene, a mixture thereof, and styrene butadiene rubber-based polymer, and combinations thereof.

15 . The electrochemical cell of claim 1 wherein said electrical conductive material includes one or more components selected from the group consisting of a graphitic carbon, an amorphous carbon, or a mixture thereof, and combinations thereof.

Assignees

• Natron Energy Inc

Inventors

• Motallebi Shahrokh
• Wessells Colin Deane

Classifications

• H01M4/60

  of organic compounds · CPC title

• H01M10/36

  Accumulators not provided for in groups H01M10/05-H01M10/34 · CPC title

• C01C3/12

  Simple or complex iron cyanides · CPC title

• H01M4/58

  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

• C07F13/00 Primary

  Compounds containing elements of Groups 7 or 17 of the Periodic Table · CPC title