Method for manufacturing all-solid-state battery
To lower electrical resistance by increasing the interfacial surface area and the adhesion between a current collector and an active material or an electrolyte, or between the active material and the electrolyte in an all-solid-state battery. In addition, to improve battery performance by eliminating or minimizing residual carbon originating from a binder. A slurry, composed of an electrode active material and a solvent, and a slurry, composed of electrolyte particles and a solvent, can be impacted against a target and thereby attached thereto to form a high-density layer and improve adhesion. Moreover, residual carbon is eliminated or minimized by eliminating or minimizing the content of binders, thereby improving battery performance.
1. A method for manufacturing a storage battery, comprising:
pulsed-spraying different electrode slurries at a gas pressure of 0.15 to 0.3 MPa on an object by independent heads to laminate each electrode slurry in order to form a positive or negative electrode on the object, wherein a distance between the object and each head is 70 mm or less, an angle of each head to the object is 30 degrees or less, a number of pulses per second is 10 Hz or higher, a base material is heated to between 30 and 150° C. when the different electrode slurries are pulsed-sprayed, each of the different electrode slurries contains a binder, and an amount of the binder in each electrode slurry is 2% or less of a total solid content by weight.
2. The method of claim 1 , wherein at least one of the different electrode slurries is a slurry containing different particles.
3. The method of claim 1 , wherein at least two of the different electrode slurries are a slurry containing an active material, and a slurry containing a conductive agent.
4. The method of claim 1 , wherein at least one of the independent heads converts the slurries filled into
(i) holes of a perforated cylindrical body or a perforated seamless belt that rotates in a direction of movement of the object, or
(ii) a plurality of grooves formed in a rotatable wide roll.
5. The method of claim 1 , wherein at least one of the electrode slurries is pulsed sprayed and laminated by the independent heads arranged in a direction of movement of the object, and the number of independent heads is the same as the number of layers of the slurry.
6. The method of claim 1 , wherein the storage battery is an all-solid-state battery, and any of the different electrode slurries contains active material particles, electrolyte particles, and a conductive agent.
7. The method of claim 1 , wherein only an interface with the object is applied by spraying or applied by a particle generator.
8. The method of claim 7 , wherein applying a thin film is performed over and over by the spraying or applied by a particle generator.
9. The method of claim 1 , wherein the storage battery is an all-solid-state battery, the object is a current collector, and the pulsed-spraying different electrode slurries is pulsed-spraying a slurry containing active material particles and a solvent and a slurry containing electrolyte particles and the solvent alternately to laminate each slurry over and over on the current collector.