All-solid battery and method of manufacturing the same
View Patent ↗An all-solid battery is formed by laminating a first current collector, a positive-electrode layer, a solid electrolyte layer, a negative-electrode layer, and a second current collector in this order. The positive-electrode fine particle layer contains positive-electrode active material fine particles having a particle diameter smaller than that of the positive-electrode active material and is formed on a side surface of the positive-electrode layer. The negative-electrode fine particle layer contains negative-electrode active material fine particles having a particle diameter smaller than that of the negative-electrode active material and is formed on a side surface of the negative-electrode layer.
1. An all-solid battery comprising:
a first current collector;
a positive-electrode layer that contains a positive-electrode active material;
a solid electrolyte layer that contains a solid electrolyte;
a negative-electrode layer that contains a negative-electrode active material;
a second current collector;
a positive-electrode fine particle layer; and
a negative-electrode fine particle layer,
wherein the first current collector, the positive-electrode layer, the solid electrolyte layer, the negative-electrode layer, and the second current collector are laminated in this order along a laminating direction,
the positive-electrode fine particle layer contains positive-electrode active material fine particles having a particle diameter smaller than a particle diameter of particles of the positive-electrode active material and is formed in contact with an end portion of the positive-electrode layer, the end portion being at an end of the positive-electrode layer in a direction perpendicular to the laminating direction, and
the negative-electrode fine particle layer contains negative-electrode active material fine particles having a particle diameter smaller than a particle diameter of particles of the negative-electrode active material and is formed in contact with an end portion of the negative-electrode layer, the end portion being at an end of the negative-electrode layer in a direction perpendicular to the laminating direction.
2. The all-solid battery of claim 1 ,
wherein a solid electrolyte fine particle layer including solid electrolyte fine particles having a particle diameter smaller than a particle diameter of particles of the solid electrolyte is formed on an outside of at least one of the positive-electrode fine particle layer and the negative-electrode fine particle layer.
3. The all-solid battery of claim 2 ,
wherein the solid electrolyte fine particle layer is formed so as to cover the outside of the positive-electrode fine particle layer.
4. The all-solid battery of claim 2 ,
wherein the solid electrolyte fine particle layer is formed so as to cover the outside of the positive-electrode fine particle layer and the negative-electrode fine particle layer.
5. The all-solid battery of claim 1 ,
wherein a length of a plane where the positive-electrode fine particle layer and the positive-electrode layer are in contact with each other in a laminating direction is twice or more the particle diameter of the positive-electrode active material, and
a length of a plane where the negative-electrode fine particle layer and the negative-electrode layer are in contact with each other in the laminating direction is twice or more the particle diameter of the negative-electrode active material.