US 11,855,253 B2
Solid electrolyte and all-solid secondary battery
Takashi Sasaki, Tokyo (JP); Tetsuya Ueno, Tokyo (JP); and Gakuho Isomichi, Tokyo (JP)
Assigned to TDK CORPORATION, Tokyo (JP)
Appl. No. 16/490,861
Filed by TDK CORPORATION, Tokyo (JP)
PCT Filed Mar. 29, 2018, PCT No. PCT/JP2018/013477
§ 371(c)(1), (2) Date Sep. 3, 2019,
PCT Pub. No. WO2018/181823, PCT Pub. Date Oct. 4, 2018.
Claims priority of application No. 2017-068912 (JP), filed on Mar. 30, 2017.
Prior Publication US 2020/0075994 A1, Mar. 5, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 10/00 (2006.01); H01M 10/0562 (2010.01); C01B 25/45 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 10/0562 (2013.01) [C01B 25/45 (2013.01); H01M 10/0525 (2013.01); C01P 2006/40 (2013.01); H01M 2300/0068 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A solid electrolyte made of a mobile ion-containing material having a composition represented by a formula LixTayZr2-yMzP3-zO12, wherein
M is at least one element selected from a group consisting of Cr, W, Mn, Fe, Se, and Te and substitutes P in the formula,
0≤y<1, 0<z<1.5, and y+zCr+zW+zMn×2+zFe×2+zSe+zTe≥1 are satisfied (except for y=0) in the formula, zCr, zW, zMn, zFe, zSe, and zTe being amounts of Cr, W, Mn, Fe, Se and Te, respectively,
0≤1−y−zCr−zW−zMn×2zFe×2−zSe−zTe≤x≤1+y+zCr+zW×5+zMn×3+zFe×3+zSe×2+zTe×3 is satisfied in the formula,
y+zCr+zW+zMn×2+zFe×2+zSe+zTe≥1 is satisfied (except for y=0) in the formula,
an occupied impurity level is within a band gap of the mobile ion-containing material, the occupied impurity level being formed by the substitution of a part of elements of the mobile ion-containing material,
per the formula, a number of sites of the occupied impurity level is equal to or greater than a number of Li.