| 摘要 |
To provide an all-solid-state lithium cell having a configuration in which capacitance and energy density are suitably improved, it being possible to significantly reduce the deterioration in cell characteristics (particularly the rise in the resistance value) that follows repeated charging and discharging. This all-solid-state lithium cell is provided with: a positive electrode plate comprising an oriented polycrystal that comprises a plurality of lithium transition metal oxide particles having a lamellar rocksalt structure with a basic composition represented by Lip(Nix,Coy,Mnz)O2 (where 0.9≤p≤1.3, 0<x<0.8, 0<y<1, 0≤z≤0.7, and x+y+z=1) or Lip(Nix,Coy,Alz)O2 (where 0.9≤p≤1.3, 0.6<x<0.9, 0.1<y≤0.3, 0≤z≤0.2, and x+y+z=1); a solid-state electrolyte layer configured using a Li-La-Zr-O-based ceramic material and/or a lithium phosphorus oxynitride (LiPON)-based ceramic material; and a negative electrode layer. The oriented polycrystal has a thickness of 10 µm or more and a degree of orientation of 15-85%. |
