Separator for electrochemical cell
An electrochemical cell having one or more electrodes with TMCCC materials introduces improved performance by including a special separator having ceramics and/or a discrete multilayer construction. TMCCC materials with no surface modifications, and existing electrolytes with no composition modifications are combined with a different grade of separator to improve cell performance.
1. An electrochemical cell, comprising:
a first electrode;
a second electrode;
a liquid electrolyte disposed in electrochemical communication with said electrodes; and
a separator disposed in said liquid electrolyte and between said electrodes, said separator including a ceramic composition;
wherein one of said electrodes includes a coordination compound;
wherein said coordination compound includes a transition metal cyanide coordination compound identified by Formula I, by A a P b [R(CN) 6 ] c (H 2 O) n wherein A identifies as one or more alkali cations and P and R each represent one or more divalent or trivalent transition metal cations; wherein a, b, and c are related based on electrical neutrality, 0<a≤2, b=1, 0.5<c<1; and wherein n=6*(1−z)+d, and wherein n>0; wherein 6*(1−z) identifies as a quantity of lattice bound water and d identified as a quantity of non-coordinated water; wherein d>0; and
wherein said separator includes two or more discrete layers, including a first layer consisting essentially of one or more polymers, and a second layer consisting essentially of a ceramic composition.
2. The electrochemical cell of claim 1 wherein said ceramic composition includes a material identifying as M x O y H z , with x, y, z identifying quantities of a metal (M), oxygen (O), and hydrogen (H); wherein x≥1; wherein y≥x+z/2 and y≤3x+z/2; and wherein z≥0 and z≤y.
3. The electrochemical cell of claim 2 wherein M includes at least one of aluminum or silicon.
4. The electrochemical cell of claim 1 wherein said ceramic composition includes particles having sizes <100 nm.
5. The electrochemical cell of claim 1 wherein said separator is configured to include a mass loading greater than 1 gram per square meter of the ceramic composition.
6. An electrochemical cell, comprising:
a first electrode;
a second electrode;
a liquid electrolyte disposed in electrochemical communication with said electrodes; and
a separator disposed in said liquid electrolyte and between said electrodes, said separator including a multilayer construction;
wherein one of said electrodes includes a coordination compound;
wherein said coordination compound includes a transition metal cyanide coordination compound identified by Formula I, by A a P b [R(CN) 6 ] c (H 2 O) n wherein A identifies as one or more alkali cations and P and R each represent one or more divalent or trivalent transition metal cations; wherein a, b, and c are related based on electrical neutrality, 0<a≤2, 0.5<c<1; and wherein n=6*(1−z)+d, and wherein n>0; wherein 6*(1−z) identifies as a quantity of lattice bound water and d identified as a quantity of non-coordinated water; wherein d>0; and
wherein said separator includes two or more discrete layers, including a first layer consisting essentially of one or more polymers, and a second layer consisting essentially of a ceramic composition.
7. The electrochemical cell of claim 6 wherein said multilayer construction includes particles having sizes <100 nm.
8. The electrochemical cell of claim 6 wherein said separator is configured to include a mass loading greater than 1 gram per square meter of a ceramic composition.
9. A method for manufacturing an electrochemical cell, comprising:
producing a first electrode including a coordination compound;
producing a second electrode;
producing a liquid electrolyte;
producing a separator, said separator including a ceramic composition; and
assembling the electrochemical cell including electrochemically communicating said electrodes to said liquid electrolyte and disposing said separator between said electrodes;
wherein said coordination compound includes a transition metal cyanide coordination compound identified by Formula I, by A a P b [R(CN) 6 ] c (H 2 O) n wherein A identifies as one or more alkali cations and P and R each represent one or more divalent or trivalent transition metal cations; wherein a, b, and c are related based on electrical neutrality, 0<a≤2, b=1, 0.5<c<1; and wherein n=6*(1−z)+d, and wherein n>0; wherein 6*(1−z) identifies as a quantity of lattice bound water and d identified as a quantity of non-coordinated water; wherein d>0; and
wherein said separator includes two or more discrete layers, including a first layer consisting essentially of one or more polymers, and a second layer consisting essentially of a ceramic composition.
10. The method of claim 9 wherein said ceramic composition includes a material identifying as M x O y H z , with x, y, z identifying quantities of a metal (M), oxygen (O), and hydrogen (H); wherein x≥1; wherein y≥x+z/2 and y≤3x+z/2; and wherein z≥0 and z≥y.
11. The method of claim 9 wherein said separator is configured to include a mass loading greater than 1 gram per square meter of a ceramic composition.
12. A method for manufacturing an electrochemical cell, comprising:
producing a first electrode including a coordination compound;
producing a second electrode;
producing a liquid electrolyte;
producing a separator, said separator including a discrete multilayer composition; and
assembling the electrochemical cell including electrochemically communicating said electrodes to said liquid electrolyte and disposing said separator between said electrodes;
wherein said coordination compound includes a transition metal cyanide coordination compound identified by Formula I, by A a P b [R(CN) 6 ] c (H 2 O) n wherein A identifies as one or more alkali cations and P and R each represent one or more divalent or trivalent transition metal cations; wherein a, b, and c are related based on electrical neutrality, 0<a≤2, b=1, 0.5<c<1; and wherein n=6*(1−z)+d, and wherein n>0; wherein 6*(1−z) identifies as a quantity of lattice bound water and d identified as a quantity of non-coordinated water; wherein d>0; and
wherein said separator includes two or more discrete layers, including a first layer consisting essentially of one or more polymers, and a second layer consisting essentially of a ceramic composition.
13. The method of claim 12 wherein said multilayer construction includes a material identifying as M x O y H z , with x, y, z identifying quantities of a metal (M), oxygen (O), and hydrogen (H)); wherein x≥1; wherein y≥x+z/2 and y≤3x+z/2; and wherein z≥0 and z≤y.
14. The method of claim 12 wherein said separator is configured to include a mass loading greater than 1 gram per square meter of the ceramic composition.