Electrochemical cells including selectively permeable membranes, systems and methods of manufacturing the same
Embodiments described herein relate generally to electrochemical cells including a selectively permeable membrane and systems and methods for manufacturing the same. In some embodiments, the selectively permeable membrane can include a solid-state electrolyte material. In some embodiments, electrochemical cells can include a cathode disposed on a cathode current collector, an anode disposed on an anode current collector, and the selectively permeable membrane disposed therebetween. In some embodiments, the cathode and/or anode can include a slurry of an active material and a conductive material in a liquid electrolyte. In some embodiments, a catholyte can be different from an anolyte. In some embodiments, the catholyte can be optimized to improve the redox electrochemistry of the cathode and the anolyte can be optimized to improve the redox electrochemistry of the anode. In some embodiments, the selectively permeable membrane can be configured to isolate the catholyte from the anolyte.
1. An electrochemical cell, comprising:
an anode including anode current collector, anode material, and an anolyte;
a cathode including cathode current collector, cathode material, and a catholyte,
the catholyte having a different composition than the anolyte; and
a selectively permeable membrane disposed between the anode and the cathode, the selectively permeable membrane including a binder and at least one of a first active material or a solid-state electrolyte, the selectively permeable membrane configured to chemically and/or fluidically isolate the anode from the cathode,
wherein at least one of the anode material or the cathode material is a semi-solid electrode, the semi-solid electrode comprising a second active material and conductive material in a liquid electrolyte, the semi-solid electrode capable of taking up or releasing ions and remaining substantially insoluble during operation of the electrochemical cell, the liquid electrolyte being at least one of the anolyte or catholyte.
2. The electrochemical cell of claim 1 ,
wherein the solid state electrolyte is selected from at least one of a garnet structure, a perovskite structure, a phosphate-based lithium super ionic conductor structure, La 0.51 Li 0.34 TiO 2.94 , Li 1.3 A 10.3 Ti 1.7 (PO 4 ) 3 , Li 7 La 3 Zr 2 O 12 , Li 6.66 La 3 Zr 1.6 Ta 0.4 O 12.9 (LLZO), 50Li 4 SiO 4 .50Li 3 BO 3 , Li 2.9 PO 3.3 N 0.46 (lithium phophorousoxynitride, LIPON), Li 3.6 Si 0.6 P 0.4 O 4 , Li 3 BN 2 , Li 3 BO 3 —Li 2 SO 4 , Li 3 BO 3 Li 2 S—O 4 Li 2 CO 3 (LIBSCO, pseudoternary system), sulfide contained solid electrolyte materials, a thio-LISICON structure, a glassy structure, a glass-ceramic structure, Li 1.07 Al 0.69 Ti 1.46 (PO 4 ) 3 , Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 , Li 10 GeP 2 S 12 (LGPS), 30Li 2 S.26B 2 S 3 .44LiI, 63Li 2 S.36SiS 2 .1Li 3 PO 4 , 57Li 2 S 38 SiS 2 .5Li 4 SiO 4 , 70Li 2 S.30P 2 S 5 , 50Li 2 S.50GeS 2 , L 17 P 3 S 11 , Li 3.25 P 0.95 S 4 , Li 9.54 Si 1.74 P 1.44 S 11.7 Cl 0.3 , a closo-type complex hydride solid electrolyte, LiBH 4 —LiI, LiBH 4 —LiNH 2 , LiBH 4 —P 2 S 5 , Li(CB 9 H 10 )—LiI, a lithium electrolyte salt, bis(trifluoromethane)sulfonamide (TFSI), bis(pentafluoroethanesulfonyl)imide (BETI), bis(fluorosulfonyl)imide, lithium borate oxalato phosphine oxide (LiBOP), lithium bis(fluorosulfonyl)imide, amide-borohydride, LiBF 4 , or LiPF 6 .
3. The electrochemical cell of claim 1 , wherein the electrochemical cell is formed without a conventional separator configured to provide electrical isolation between the anode and the cathode.
4. The electrochemical cell of claim 1 , wherein the selectively permeable membrane extends substantially beyond the anode and the cathode and is sealed between a first portion of a pouch material and a second portion of the pouch material.
5. The electrochemical cell of claim 1 , wherein the selectively permeable membrane has a thickness that is between about 1 μm and about 250 μm.
6. The electrochemical cell of claim 1 , wherein the selectively permeable membrane has a thickness that is less than about 185 μm.
7. The electrochemical cell of claim 1 , wherein the selectively permeable membrane has a thickness that is less than about 50 μm.
8. The electrochemical cell of claim 1 , wherein the anolyte includes at least one of 1,2-dimethoxyethane, N-methylpyrrolidone, LiBOP, LiDFOB, and/or VC.
9. The electrochemical cell of claim 1 , wherein the anolyte includes at least one of a LiFSI salt, a LiTFSI salt, a glyme, DOL, TEGDME, and FEC.
10. The electrochemical cell of claim 1 , wherein the catholyte includes at least one of water, fluorine, a LiPF 6 salt, a LiBF 4 salt, FEC, F-EMC, F-AEC, PC, sulfolane, dimethyl sulfoxide, LiTFSI, LiOTf, LiFSI, or TFEP.
11. The electrochemical cell of claim 1 ,
wherein the semi-solid electrode further comprises self-terminated oligomers with hyperbranched architecture (STOBA®).
12. The electrochemical cell of claim 1 , further comprising:
a lithium metal layer disposed between the anode current collector and the anode material.
13. The electrochemical cell of claim 1 , further comprising:
a first film layer disposed between the anode material and the selectively permeable membrane.
14. The electrochemical cell of claim 1 , wherein the cathode material is a solid-state cathode.
15. The electrochemical cell of claim 1 , further comprising:
a self-terminated oligomers with hyperbranched architecture (STOBA®) layer disposed between selectively permeable membrane and at least one of the anode material or the cathode material.
16. The electrochemical cell of claim 1 , wherein the selectively permeable membrane includes a diffusion preventing material applied to one or both sides of the selectively permeable membrane.
17. The electrochemical cell of claim 16 , wherein the diffusion preventing material the diffusion preventing material has a thickness of about 1 μm and about 25 μm.
18. The electrochemical cell of claim 1 , wherein the anode material is a solid-state anode.
19. The electrochemical cell of claim 18 , wherein the anode material is a lithium metal layer disposed between the anode current collector and the selectively permeable membrane.
20. The electrochemical cell of claim 1 , further comprising:
a Li 2 CoO 3 layer disposed between the selectively permeable membrane and the cathode material.
21. The electrochemical cell of claim 20 , further comprising:
a metal oxide disposed between the selectively permeable membrane and the anode material.
22. The electrochemical cell of claim 1 , further comprising:
a first film layer disposed between the cathode material and the selectively permeable membrane.
23. The electrochemical cell of claim 22 , wherein the first film layer wets the cathode material and the selectively permeable membrane.
24. The electrochemical cell of claim 22 , further comprising:
a second film layer disposed between the anode material and the selectively permeable membrane.
25. The electrochemical cell of claim 24 , wherein the second film layer wets the anode material and the selectively permeable membrane.