Solid electrolyte-electrode assembly, methods for making, and an all-solid-state battery thereof

A method for manufacturing a solid electrolyte-cathode assembly, comprising:

• providing a plurality of cathode particles, wherein the cathode particles have an average particle size of 0.1 μm to 20 μm;
• providing a solid electrolyte, wherein the solid electrolyte is provided in the form of particles having an average particle size less than 5 μm;
• providing a binder;
• and
• co-rolling the plurality of cathode particles, the solid electrolyte, and the binder, under conditions to form the solid electrolyte-cathode assembly,
• wherein the co-rolling process is conducted at a speed of about 1 m/min to 10 m/min,
• wherein the co-rolling produces a network-reinforced interface between the solid electrolyte and the cathode in the solid electrolyte-cathode assembly,
• wherein the solid electrolyte-cathode assembly comprises a cathode layer having a thickness of more than 10 μm and less than 200 μm;
• wherein an amount of the binder is less than 1%, such that contact between the cathode layer and the solid electrolyte layer is increased;
• and
• wherein a ratio of a thickness of the cathode layer to a thickness of the solid electrolyte layer is from 1:1 to 20:1.

A solid electrolyte-cathode assembly, prepared by:

• providing a plurality of cathode particles;
• providing a solid electrolyte, wherein the solid electrolyte is provided in the form of particles having an average particle size less than 5 μm;
• providing a binder;
• and
• co-rolling the plurality of cathode particles, the solid electrolyte, and the binder, under conditions to form the solid electrolyte-cathode assembly,
• wherein the solid electrolyte-cathode assembly comprises a cathode layer having a thickness of more than 10 μm and less than 200 μm;
• wherein the solid electrolyte-cathode assembly does not have a current collector;
• wherein an amount of the binder is less than 1%, such that contact between the cathode layer and the solid electrolyte layer is increased;
• and
• wherein a ratio of a thickness of the cathode layer to a thickness of the solid electrolyte layer is from 1:1 to 20:1.