Micro-sized secondary particles with enhanced ionic conductivity for solid-state electrode

Patent metadata

Field	Value
Publication number	US-11575120-B2
Application number	US-201916598237-A
Country	US
Kind code	B2
Filing date	Oct 10, 2019
Priority date	Jul 29, 2019
Publication date	Feb 7, 2023
Grant date	Feb 7, 2023

Abstract

An electrode including micro-sized secondary particle (MSSP) with enhanced ionic conductivity for solid-state battery is provided. The MSSP comprises a cathode particle and a solid-state electrolyte. The cathode particle is at least partially coated by solid-state electrolyte. The lithium ion transport inside the micro-sized secondary particles is increased by the incorporation of solid-state electrolyte. The electrode can be prepared by casting the slurry comprising MSSP, another electrolyte, binders, and conductive additives on the current collector. The current collector is comprised of a conductive material. The current collector has a first side and a second side. The electrode active material layer is disposed on one of the first and second sides of the current collector.

First claim

What is claimed is:

1. An electrode with enhanced ionic conductivity for a lithium ion battery, the electrode comprising:
a current collector comprising a conductive material, the current collector comprising a positive current collector having a first side and a second side; and
an electrolytic layer comprising a micro-sized secondary particle including an active material primary particle and a solid-state electrolyte, the solid-state electrolyte and the active material primary particle being mixed together and heated to between about 300° C. and about 650° C. for about 12 hours, the electrolytic layer disposed on one of the first and second sides of the current collector, wherein a total mass ratio of the solid-state electrolyte in the electrode is up to about 50%;
wherein the micro-sized secondary particle having an average diameter of between about 1.0 micrometer and about 20 micrometers; and
wherein the micro-sized secondary particle has a tap density of greater than about 0.5 g/cm3.

2. The electrode of claim 1 further comprising a second ionic conductive electrolyte, an electronic conductive additive, and an electrode material.

3. The electrode of claim 1 wherein the primary particle in the micro-sized secondary particle is at least partially coated by the solid-state electrolyte.

4. The electrode of claim 1 wherein the electrolytic layer is a cathode layer and wherein the primary particle is a cathode material.

5. The electrode of claim 4 wherein the micro-sized secondary particle has a tap density of greater than about 1.0 g/cm3.

6. The electrode of claim 4 wherein the cathode material comprises one of a rock salt layered oxide, a spinel cathode, a phosphate, a silicate, and a sulfur cathode material.

7. The electrode of claim 1 further comprising a negative current collector wherein the electrolytic layer is an anode layer and wherein the primary particle is an anode material.

8. The electrode of claim 7 wherein the anode material comprises one of lithium titanium oxide, a metal oxide, a metal sulfide, silicon, a silicon-alloy, a lithium-alloy, and a carbonaceous anode.

9. The electrode of claim 1 wherein the solid-state electrolyte comprises one of a Garnet type, a LISICON type, a NASICON type, a Perovskite type, a Sulfide, a Hydride, a Halide, a Borate; a Nitride, a LiPON, a Polymer, an antiperovskite solid-state electrolyte and composite thereof.

10. A solid-state battery comprising:
an electrode with enhanced ionic conductivity for a lithium ion battery, the electrode comprising:
a current collector comprising a conductive material, the current collector comprising a positive current collector having a first side and a second side; and
an electrolytic layer comprising a micro-sized secondary particle including an active material primary particle and a solid-state electrolyte, the solid-state electrolyte and the active material primary particle being mixed together and heated to between about 300° C. and about 650° C. for about 12 hours, the electrolytic layer disposed on one of the first and second sides of the current collector, wherein a total mass ratio of the solid-state electrolyte in the electrode is up to 50%;
wherein the micro-sized secondary particle having an average diameter of between about 1.0 micrometer and about 20 micrometers; and
wherein the micro-sized secondary particle has a tap density of greater than about 0.5 g/cm3.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Hou Mengyan
• Li Zhe
• Su Qili
• Que Xiaochao
• Wu Meiyuan

Classifications

• H01M4/13 Primary

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M10/0562

  Solid materials · CPC title

• H01M2300/0068

  inorganic · CPC title

• H01M10/4235

  Safety or regulating additives or arrangements in electrodes, separators or electrolyte (H01M10/4242 takes precedence) · CPC title