Surface-modified cyanide-based transition metal compounds

A material, comprising:

• at least one composition represented by Formula II:
• AxMn(y-k)Mjk[Mnm(CN)(6-p-q)(NC)p(Che_I)rq]z.CHE_GROUP (Vac)(i-z).nH2O, (Formula II):
• wherein CHE_GROUP includes one or more chelation materials selected from the group consisting of (Che_I)rw, (Che_II)sv, 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)rq 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)rq 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)rq 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)rq complexes;
• wherein (Vac) identifies a Mn(CN)(6-p-q)(NC)p(Che_I)rq vacancy;
• wherein CN identifies a cyano group;
• and
• wherein NC identifies an isocyano group.