Granted Patent B2

US 9,287,589 · App. 14/231,571 · Granted Mar 15, 2016

Abstract

Claims (33)

1. A rechargeable electrochemical cell, comprising:

a positive electrode;

a negative electrode; and

an electrolyte having a total electrolyte volume V including a first quantity of water comprising a first fraction V 1 of said total electrolyte volume V and including a second quantity of one or more organic cosolvents together comprising a second fraction V 2 of said total electrolyte volume V;

wherein V 1 /V>0.02;

wherein V 2 >V 1 ;

wherein a particular one electrode of said electrodes includes a transition metal cyanide coordination compound (TMCCC) material; and

wherein said electrolyte is a single phase.

2. The rechargeable electrochemical cell of claim 1 wherein said TMCCC material includes a composition having the general chemical formula A x M y [R(CN) 6-j L j ] z .nH 2 O, wherein:

A includes one or more cations;

M includes one or more metal cations;

R includes one or more transition metal cations; and

L is a ligand substituted in the place of a CN − ligand; where

0≦x≦2;

0<y≦4;

0<z≦1;

0≦j≦6; and

0≦n≦5.

3. The rechargeable electrochemical cell of claim 2 wherein:

said A cations include one or more cations selected from the group consisting of Na + , K + , Li + , NH 4+ , Mg 2+ Ca 2+ and combinations thereof;

said M metal cations include one or more metal cations selected from the group consisting of Ti 3+ , Ti 4+ , V 2+ , V 3+ , Cr 2+ , Cr 3+ , Mn 2+ , Mn 3+ , Fe 2+ , Fe 3+ , Co 2+ , Co 3+ , Ni 2+ , Cu + , Cu 2+ , Zn 2+ , Al 3+ , Sn 2+ , In 3+ , or Pb 2+ and combinations thereof;

said R transition metal cations include one or more transition metal cations selected from the group consisting of V 2+ , V 3+ , Cr 2+ , Cr 3+ , Mn + , Mn 2+ , Mn 3+ , Fe 2+ , Fe 3+ , Co 2+ , Co 3+ , Ru 2+ , Ru 3+ , Os 2+ , Os 3+ , Ir 2+ , Ir 3+ , Pt 2+ , Pt 3+ , and combinations thereof; and

said L ligands include one or more ligands selected from the group consisting of CO (carbonyl), NO (nitrosyl), Cl − , and combinations thereof.

4. The rechargeable electrochemical cell of claim 1 wherein said electrolyte produces a total concentration of said plurality of cations in electrolyte greater than 0.1 M.

5. The rechargeable electrochemical cell of claim 4 wherein said total concentration is greater than 1.4 M.

6. The rechargeable electrochemical cell of claim 1 wherein said electrolyte includes one or more polar aprotic solvents.

7. The rechargeable electrochemical cell of claim 6 wherein said one or more polar aprotic solvents include one or more organic polar aprotic cosolvents.

8. The rechargeable electrochemical cell of claim 1 wherein V 1 /V≦30% and V 2 /V≧70%.

9. The rechargeable electrochemical cell of claim 8 wherein V 1 /V≦10% and V 2 /V≧90%.

10. The rechargeable electrochemical cell of claim 1 having a full cell voltage at a 50% charge state is greater than 1 V.

11. The rechargeable electrochemical cell of claim 1 wherein one of said electrodes is configured as an anode having a reaction potential centered below −0.5 V vs. a standard hydrogen electrode.

12. The rechargeable electrochemical cell of claim 1 wherein one of said electrodes is configured as a cathode having a reaction potential centered above 0.7 V vs. a standard hydrogen electrode.

13. The rechargeable electrochemical cell of claim 7 wherein said one of more organic polar aprotic cosolvents include a particular cosolvent having one or more sulfone groups wherein said particular cosolvent includes sulfolane.

Assignments (10)