| 摘要 |
PROBLEM TO BE SOLVED: To provide an all-solid lithium secondary battery with excellent interlayer adhesion.SOLUTION: The all-solid lithium secondary battery is characterized in that at least one of a positive electrode active material, a negative electrode active material, and a lithium ion conductive solid electrolyte is a crystalline material having an anisotropic thermal expansion coefficient, in that the crystalline material is oriented with its crystal axis tilted at a predetermined angle θ against a surface direction so that differences among respective thermal expansion coefficients of the positive electrode active material, the negative electrode active material, and the lithium ion conductive solid electrolyte in the surface direction are within 1.5% of an average of the respective thermal expansion coefficients, and in that the positive electrode active material, the negative electrode active material, and the lithium ion conductive solid electrolyte are unified by heating. |
