Solid-state battery

Patent metadata

Field	Value
Publication number	US-2024405265-A1
Application number	US-202418736238-A
Country	US
Kind code	A1
Filing date	Jun 6, 2024
Priority date	Jun 6, 2018
Publication date	Dec 5, 2024
Grant date	—

Abstract

Provided herein solid-state battery architectures that include an oxide electrolyte in contact with the anode of an electrochemical cell and a sulfide electrolyte in contact with the cathode of an electrochemical cell.

First claim

1 .- 24 . (canceled)

25 . A solid-state electrochemical cell (SSEC), comprising:
(a) a positive electrode layer comprising an active material and a sulfide catholyte, wherein the active material is selected from LiNi x Mn y Co z O 2 , and LiNi x Al y Co z O 2 , wherein x+y+z is equal to 1; (b) a single ion conducting, solid-state buffer layer, wherein the single ion conducting, solid-state buffer layer comprises a sulfide; (c) a borohydride bonding layer comprising:
A·(LiBH 4 )·B·(LiX)·C·(LiNH 2 ),
wherein X is fluorine, bromine, chlorine, iodine, or a combination thereof, and
wherein 3≤A≤6, 2≤B≤5, and 0≤C≤9; and
(d) a lithium-stuffed garnet layer, wherein the lithium-stuffed garnet layer comprises a lithium-stuffed garnet selected from Li A La B M′ C M″ D Zr E O F , Li A La B M′ C M″ D Ta E O F , or Li A La B M′ C M″ D Nb E O F , wherein 4<A<8.5, 1.5<B<4, 0≤C≤2, 0≤D≤2; 0≤E≤3, 10≤F≤13, and M′ and M″ are each, independently in each instance selected from Ga, Al, Mo, W, Nb, Sb, Ca, Ba, Sr, Ce, Hf, Rb, and Ta, or Li a La b Zr c Al d Me″ e O f , wherein 5<a<8.5; 2<b<4; 0<c≤2.5; 0≤d<2; 0≤e<2, and 10<f<13 and Me″ is a metal selected from Ga, Nb, Ta, V, W, Mo, and Sb; wherein the buffer layer is a layer in contact with the positive electrode layer; and wherein the borohydride bonding layer is between and in contact with the lithium-stuffed garnet layer and the buffer layer in contact with the positive electrode.

26 . The SSEC of claim 25 , wherein the single ion conducting, solid-state buffer layer is characterized by one of the following formula: Li a Si b Sn c P d S e O f , wherein 2≤a≤8, 0≤b≤1, 0≤c≤1, b+c=1, 0.5≤d≤2.5, 4≤e≤12, and 0≤f≤10; Li a Si b Sn c P d S e , wherein 8<a<12, 1<b<3, 1<c<3, 8<d<14, and 0<e<1, wherein X is F, Cl, Br, or I; Li g As h Sn j S k O l , wherein 2≤g≤6, 0≤h≤1, 0≤j≤1, 2≤k≤6, and 0≤l≤10; Li m P n S p I q , wherein 2≤m≤6, 0≤n≤1, 0≤p≤1, 2≤q≤6; a mixture of (Li 2 S):(P 2 S 5 ) having a molar ratio of Li 2 S:P 2 S 5 from about 10:1 to about 6:4 and LiI, wherein the ratio of [(Li 2 S):(P 2 S 5 )]:LiI is from 95:5 to 50:50; LPS+X, wherein X is selected from Cl, I, or Br; vLi 2 S+wP 2 S 5 +yLiX; or vLi 2 S+wSiS 2 +yLiX.

27 . The SSEC of claim 26 , wherein the single ion conducting, solid-state buffer layer is characterized by Li a Si b Sn c P d S e O f , wherein 2≤a≤8, 0≤b≤1, 0≤c≤1, b+c=1, 0.5≤d≤2.5, 4≤e≤12, and 0≤f≤10.

28 . The SSEC of claim 25 , wherein the single ion conducting, solid-state buffer layer is characterized by LSTPS, wherein LSTPS is an electrolyte material including Li, Si, P, Sn, and S chemical constituents.

29 . The SSEC of claim 25 , wherein the buffer layer has a thickness of 1 μm to 15 μm.

30 . The SSEC of claim 25 , wherein the buffer layer comprises particles with D 50 of about 10 nm to 1000 nm.

31 . The SSEC of claim 25 , wherein the buffer layer has a porosity less than about 20% v/v.

32 . The SSEC of claim 25 , wherein the buffer layer comprises an organic polymer at 10% by volume or less.

33 . The SSEC of claim 25 , wherein the lithium-stuffed garnet is Li a La b Zr c Al d Me″ e O f , wherein 5<a<8.5; 2<b<4; 0<c≤2.5; 0≤d<2; 0≤e<2, and 10<f<13 and Me″ is a metal selected from Ga, Nb, Ta, V, W, Mo, and Sb.

34 . The SSEC of claim 25 , wherein the borohydride bonding layer comprises LiBH 4 :LiI (3:1), LiNH 2 :LiBH 4 :LiI (3:3:2), LiNH 2 :LiBH 4 :LiI (9:3:4), or LiNH 2 :LiBH 4 :LiI (9:3:2).

35 . The SSEC of claim 25 , wherein the active material is coated or partially coated with a coating selected from the group consisting of lithium niobium oxide, lithium zirconium oxide, lithium aluminum oxide, lithium phosphate, lithium tantalum oxide, lithium hafnium oxide, niobium oxide, zirconium oxide, aluminum oxide, tantalum oxide, and hafnium oxide.

36 . The SSEC of claim 25 , wherein the active material is coated or partially coated with a coating of lithium zirconium oxide.

37 . The SSEC of claim 25 , wherein the sulfide catholyte is selected from the group consisting of LSS, SLOPS, LSTPS, LSTPSCl, SLOBS, LATS, and LPS+X, wherein X is selected from the group consisting of Cl, I, Br, and combinations thereof.

38 . The SSEC of claim 25 , wherein the sulfide catholyte is characterized by one of the following formula:
Li a Si b Sn c P d S e , wherein 2≤a≤8, 0≤b≤1, 0≤c≤1, 0.5≤d≤2.5, and 2≤e≤12; Li a Si b P c S d X e , wherein 8<a<12, 1<b<3, 1<c<3, 8<d<14, and 0<e<1, wherein X is F, Cl, Br, or I; Li g As h Sn j S k O l , wherein 2≤g≤6, 0≤h≤1, 0≤j≤1, 2≤k≤6, and 0≤l≤10; or Li m P n S p I q , wherein 2≤m≤6, 0≤n≤1, 0≤p≤1, 2≤q≤6; a mixture of (Li 2 S):(P 2 S 5 ) having a molar ratio of Li 2 S:P 2 S 5 from about 10:1 to about 6:4 and LiI, wherein the ratio of [(Li 2 S):(P 2 S 5 )]:LiI is from 95:5 to 50:50; LPS+X, wherein X is selected from Cl, I, or Br; vLi 2 S±wP 2 S 5 +yLiX; vLi 2 S+wSiS 2 +yLiX; or vLi 2 S+wB 2 S 3 +yLiX, wherein X is selected from Cl, I, or Br, wherein 0≤v≤1; 0≤w≤1; and 0≤y≤1.

39 . The SSEC of claim 38 , wherein the sulfide catholyte is characterized by the following formula: Li a Si b Sn c P d S e , wherein 2≤a≤8, 0≤b≤1, 0≤c≤1, 0.5≤d≤2.5, and 2≤e≤12.

40 . The SSEC of claim 38 , wherein the sulfide catholyte comprises LPS+X, wherein X is selected from Cl, I, or Br.

41 . The SSEC of claim 25 , wherein the SSEC retained greater than 80% of its energy after cycling for 200 cycles.

42 . The SSEC of claim 25 , wherein the SSEC has a low area-specific resistance (ASR) of approximately 54 W-cm 2 at 45° C.

43 . A dual layer stack comprising:
(a) a positive electrode layer comprising an active material and a sulfide catholyte, wherein the active material is selected from LiNi x Mn y Co z O 2 , and LiNi x Al y Co z O 2 , wherein x+y+z is equal to 1; and (b) a single ion conducting, solid-state buffer layer, wherein the single ion conducting, solid-state buffer layer comprises a sulfide; wherein the buffer layer has a thickness of 1 μm to 15 μm; and wherein the buffer layer is a layer in contact with the positive electrode layer.

44 . The dual layer stack of claim 43 , wherein the buffer layer comprises particles with D 50 of about 10 nm to 1000 nm.

Assignees

• Quantumscape Battery Inc

Inventors

• Chao Cheng-Chieh W
• Dekmezian Christopher T
• Li Shuang

Classifications

• H01M10/0562 Primary

  Solid materials · CPC title

• H01M4/5815

  Sulfides · CPC title

• H01M4/62 Primary

  Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title

• H01M10/0585 Primary

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• H01M10/052 Primary

  Li-accumulators · CPC title