Solid electrolyte layer and all-solid-state battery using same
A solid electrolyte layer having a solid electrolyte and carbon, in which a dispersion degree (CV value) of the carbon measured by a quadrat method in a cross section of the solid electrolyte layer is more than zero and less than one.
1. A solid electrolyte layer comprising:
a solid electrolyte; and
carbon,
wherein, in a cross section of the solid electrolyte layer, a dispersion degree (CV value) of the carbon measured by a quadrat method is more than zero and less than one, and
wherein an amount of the carbon in the solid electrolyte layer is 0.01 to 1.8 vol %.
2. The solid electrolyte layer according to claim 1 ,
wherein, in an argon laser Raman spectrum, when an intensity of a G band peak derived from a graphite structure present near 1580 cm −1 is represented by IG, an intensity of a D band peak derived from distortion of the graphite structure present near 1350 cm −1 is represented by ID, and a ratio therebetween is defined as a graphitization degree (IG/ID), an IG/ID value of the carbon is 0.0 or more and 4.0 or less.
3. The solid electrolyte layer according to claim 1 ,
wherein an average particle diameter of the carbon particles is 0.01 μm or more and 1 μm or less.
4. The solid electrolyte layer according to claim 1 ,
wherein the carbon particles are diamond or amorphous carbon particles.
5. The solid electrolyte layer according to claim 1 ,
wherein the amount of the carbon in the solid electrolyte layer is 0.02 to 0.80 vol %.
6. The solid electrolyte layer according to claim 1 ,
wherein the amount of the carbon in the solid electrolyte layer is equal to 0.05 to 1.8 vol %.
7. An all-solid-state battery comprising:
the solid electrolyte layer according to claim 1 .
8. The all-solid-state battery according to claim 7 , comprising:
a positive electrode layer;
a negative electrode layer;
the solid electrolyte layer positioned between the positive electrode layer and the negative electrode layer; and
a margin layer disposed at an outer circumference of each of the positive electrode layer and the negative electrode layer side by side,
wherein the margin layer has a solid electrolyte and carbon, and
a dispersion degree (CV value) of the carbon measured by a quadrat method in a cross section of the margin layer is more than zero and less than one.