# US 11,309,594 B1 · Optimization of electrochemical cell > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,309,594 B1 - Document ID: US11309594B1 - Status: Granted - Kind: B1 - Application number: 17/232,484 - Filed: 2021-04-16 - Granted: 2022-04-19 - Earliest claimed: 2021-04-16 - Assignees: Natron Energy, Inc. - Applicants: Natron Energy, Inc. - Inventors: Colin Deane Wessells; Daniel Friebel; Peter Benjamin Herman; Grace Marjorie Yee - Web page: https://patentgrep.com/patent/US11309594B1 ## CPC - H01M 10/484: {for measuring electrolyte level, electrolyte density or electrolyte conductivity} - H01M 4/58: 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 - H01M 10/052: Li-accumulators - H01M 10/058: Construction or manufacture - H01M 10/4285: {Testing apparatus} - H01M 4/40: Alloys based on alkali metals - H01M 10/38: Construction or manufacture - H01M 2300/0002: Aqueous electrolytes - H01M 2300/0017: Non-aqueous electrolytes - H01M 2300/0025: Organic electrolyte - H01M 2300/0028: characterised by the solvent - Y02E 60/10: Energy storage using batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A system and method for optimizing electrochemical cells including electrodes employing coordination compounds by mediating water content within a desired water content profile that includes sufficient coordinated water and reduces non-coordinated water below a desired target and with electrochemical cells including a coordination compound electrochemically active in one or more electrodes, with an improvement in electrochemical cell manufacture that relaxes standards for water content of electrochemical cells having one or more electrodes including one or more such transition metal cyanide coordination compounds. ## Claims ### Claim 1 An electrochemical cell, comprising: 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-communication set of properties before said electrodes are electrochemically communicated with said liquid electrolyte, and a post-communication set of properties after said electrodes are electrochemically communicated with said liquid electrolyte; wherein said anode electrode and said cathode electrode each contain 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 a multivalent transition metal cation; wherein 0.50, y>0, z>0; and wherein n=6*(1−z)+mk, with n>0, with k=0 identifying an as-synthesized material and k=1 to 4 identifying a set of post-synthesized states for each particular electrode of said electrodes, 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 for the composition of Formula I excluding all of its water content, with M0 identifying as an as-synthesized set of properties for said particular electrode, with M1 identifying as a pre-communication set of properties for said anode electrode, with M2 identifying as a pre-communication set of properties for said cathode electrode, with M3 identifying as a post-communication set of properties for said anode electrode, and with M4 identifying as a post-communication 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-communication 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 of Formula I; wherein said M1 includes a range between 1% and 12% for a set of anode electrode materials of said anode electrode with M1≤M3, said set of anode electrode materials including said composition of Formula I; wherein said M2 includes a range between 1% and 12% for a set of cathode electrode materials of said cathode electrode with M2≤M4, said set of cathode electrode materials including said composition of Formula I; and wherein M3+M4>M1+M2. ### Claim 2 (depends on 1) The electrochemical cell of claim 1 with c1<1,000 ppm and with c2<100 ppm. ### Claim 3 (depends on 1) The electrochemical cell of claim 1 with c1<1,000 ppm and with c2<20 ppm. ### Claim 4 (depends on 1) The electrochemical cell of claim 1 wherein said polar organic solvent includes a mononitrile. ### Claim 5 (depends on 4) The electrochemical cell of claim 4 wherein said liquid electrolyte includes a dinitrile as an additive. ### Claim 6 (depends on 1) The electrochemical cell of claim 1 wherein said anode electrode materials are different from said cathode electrode materials. ### Claim 7 (depends on 1) The electrochemical cell of claim 1 wherein M1=M3. ### Claim 8 (depends on 1) The electrochemical cell of claim 1 wherein M2=M4. ### Claim 9 (depends on 1) The electrochemical cell of claim 1 wherein M1