Surface-modified cyanide-based transition metal compounds
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 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 , 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.
1. A material, comprising:
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;
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 material of claim 1 wherein at least one of said chelation species comprises an organic acid.
3. The material of claim 2 wherein said organic acid comprises a compound containing a carboxylate group.
4. The material 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 material of claim 1 wherein said organic acid comprises a compound containing an acid of an amine.
6. The material of claim 5 wherein said compound comprises EDTA.
7. The material of claim 1 wherein said organic acid comprises a compound containing a phosphonic acid group.
8. The material of claim 7 wherein said compound comprises HEDP.