Solid state electrolytes for safe metal and metal-ion batteries

Patent metadata

Field	Value
Publication number	US-2017170515-A1
Application number	US-201615380890-A
Country	US
Kind code	A1
Filing date	Dec 15, 2016
Priority date	Dec 15, 2015
Publication date	Jun 15, 2017
Grant date	—

Abstract

A Li or Li-ion or Na or Na-ion battery cell is provided that comprises anode and cathode electrodes, a separator, and a solid electrolyte. The separator electrically separates the anode and the cathode. The solid electrolyte ionically couples the anode and the cathode. The solid electrolyte also comprises a melt-infiltration solid electrolyte composition that is disposed at least partially in at least one of the electrodes or in the separator.

First claim

1 . A Li or Li-ion or Na or Na-ion battery cell, comprising:
anode and cathode electrodes; a separator electrically separating the anode and the cathode; and a solid electrolyte ionically coupling the anode and the cathode, wherein the solid electrolyte comprises a melt-infiltration solid electrolyte composition disposed at least partially in at least one of the electrodes or in the separator.

2 . The battery cell of claim 1 , wherein the melt-infiltration solid electrolyte composition has a melting point between 200° C. to 450° C.

3 . The battery cell of claim 1 , wherein the melt-infiltration solid electrolyte composition comprises the following elements:
Li or Na; a mixture of O with S, Se, or both; and a mixture of two of the following: I, F, Br, and Cl, wherein the atomic ratio of O to S or Se in the melt-infiltration solid electrolyte composition is within the range of 20:1 to 1:2.

4 . The battery cell of claim 3 , wherein the melt-infiltration solid electrolyte composition further comprises N, and wherein the atomic ratio of O to N in the melt-infiltration solid electrolyte composition is within the range of 2500:1 to 1:2.5.

5 . The battery cell of claim 3 , wherein the melt-infiltration solid electrolyte composition further comprises P, wherein the atomic ratio of O to P in the melt-infiltration solid electrolyte composition is within the range of 2500:1 to 1:2.5.

6 . The battery cell of claim 3 , wherein:
the melt-infiltration solid electrolyte composition further comprises at least one of the following metals: La, Ce, Pr, Eu, Yb, Nd, Sm, Gd, Si, Sn, As, Sb, In, Mo, Nb, Zr, Y, Hf, Ta, W, B, Cs, Ba, Sr, Fe, V, Mn, Tl, or Al; and the atomic ratio of Li or Na to the combination of all other metals in the melt-infiltration solid electrolyte composition of the electrolyte is within the range of 5000:1 to 1:3.

7 . The battery cell of claim 6 , wherein the melt-infiltration solid electrolyte composition comprises at least two metals, one of the metals being selected from the group consisting of La, Ce, Eu, and Yb.

8 . The battery cell of claim 3 , wherein the melt-infiltration solid electrolyte composition exhibits an ionic conductivity in the range of 0.00005 S/cm to 0.05 S/cm at 30° C.

9 . The battery cell of claim 3 , wherein the anode comprises an active material that comprises Si, Ge, Sb, Sn, Al, or P.

10 . The battery cell of claim 3 , wherein the anode comprises Li metal.

11 . The battery cell of claim 10 , further comprising an interlayer disposed at the interface between the Li metal and the solid electrolyte.

12 . The battery cell of claim 10 , wherein the Li metal anode further comprises metal or carbon in the form of particles, fibers, foam, fabric, or paper.

13 . The battery cell of claim 3 , wherein the cathode comprises an active material that comprises CuF 2 , FeF 3 , LiF, Fe, or Cu.

14 . The battery cell of claim 3 , wherein at least one of the electrodes comprises a conversion material in the form of composite particles.

15 . The battery cell of claim 3 , wherein at least one of the electrodes comprises active electrode particles, the active electrode particles being enclosed in one or more shells that separate the electrode particles from direct contact with the solid electrolyte.

16 . The battery cell of claim 15 , wherein the shells comprise pores.

17 . The battery cell of claim 3 , wherein the separator comprises one or more metal oxides.

18 . The battery cell of claim 17 , wherein the separator comprises aluminum oxide, magnesium oxide, or zirconium oxide, in the form of fibers or nanofibers.

19 . The batter cell of claim 1 , wherein at least one of the electrodes comprises a current collector that comprises two or more metal foils and a conductive lubricant between the metal foils.

20 . The battery cell of claim 1 , wherein the melt-infiltration solid electrolyte composition is melt-infiltrated into the cell at temperatures below 400° C.

21 . The battery cell of claim 1 , wherein the melt-infiltration solid electrolyte composition is formed without any H-containing constituents as an electrolyte precursor.

Assignees

• Sila Nanotechnologies Inc

Inventors

• Yushin Gleb
• Kajdos Adam
• Berdichevsky Eugene
• Zdyrko Bogdan

Classifications

• H01M10/052

  Li-accumulators · CPC title

• H01M4/38

  of elements or alloys · CPC title

• H01M50/431

  Inorganic material · CPC title

• H01M10/054

  Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium · CPC title

• H01M10/0562 Primary

  Solid materials · CPC title