Patent ID: 11967686
Assignee: NATRON ENERGY, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 5:
6. A method for assembling an electrochemical cell, comprising:
a) assembling a cell stack having a liquid electrolyte, an anode electrode, a separator, and a cathode electrode, said electrodes electrochemically communicated with said liquid electrolyte, with components of said cell stack having an as-synthesized set of properties, a pre-assembly set of properties before said electrodes are electrochemically communicated with said liquid electrolyte, and a post-assembly set of properties after said electrodes are electrochemically communicated with said liquid electrolyte;
b) transferring water from said liquid electrolyte to at least one of said electrodes; and thereafter
c) decreasing a concentration of water in said liquid electrolyte;
wherein said anode electrode and said cathode electrode each contain an active material including a transition metal cyanide coordination compound material having a composition conforming to Formula I, Formula I including AxPy[R(CN)6]z(H2O)n;
wherein A represents an alkali cation and P and R each represent one or more transition metal cations;
wherein 0.5<z<1; and
wherein x, y, and z are related based on electrical neutrality, x>0, y>0, z>0; and
wherein n=6*(1−z)+mk, with n>0, with k=0 identifying an as-synthesized material manode for said anode electrode and mcathode for said cathode electrode with m0 an average of manode and mcathode and k=1 to 4 identifying a set of post-synthesized states for each particular electrode of said electrodes wherein said particular electrode includes said anode electrode for k=1 and for k=3 and wherein said particular electrode includes said cathode electrode for k=2 and for k=4, and with 6*(1−z) identifying as a quantity of coordinated water of said compound material, and with each mk>0, each mk identifying as a quantity of interstitial water of said compound material for one of said states of said particular electrode, with each said quantity mk of interstitial water being equivalent to a weight percentage Mk=mk*WH2O/Wdry*100%, with WH2O being the molecular weight of water and Wdry being the molecular weight of said composition conforming to Formula I excluding all of its water content, with M0 identifying as an average as-synthesized set of properties for said particular anode electrode and said cathode electrode, with M1 identifying as said pre-assembly set of properties for said anode electrode, with M2 identifying as said pre-assembly set of properties for said cathode electrode, with M3 identifying as said post-assembly set of properties for said anode electrode, and with M4 identifying as said post-assembly set of properties for said cathode electrode; and
wherein said liquid electrolyte includes a polar organic solvent combined with an alkali metal salt and water having a water concentration, said water concentration including a pre-assembly water concentration c1 and including a post-communication water concentration c2 and wherein c1>c2;
wherein said as-synthesized set of properties includes M0 up to 45% for a set of as-synthesized materials, said set of as-synthesized materials including said composition conforming to Formula I;
wherein said M1<12% for a set of anode electrode materials of said anode electrode with M1≤M3, said set of anode electrode materials including said composition conforming to Formula I;
wherein said M2<12% for a set of cathode electrode materials of said cathode electrode with M2≤M4, said set of cathode electrode materials including said composition conforming to Formula I; and
wherein M3+M4>M1+M2.