TY - JOUR
T1 - DFT Electronic Properties and Synthesis Thermodynamics of LixLa1-xTiO3Electrolytes for Li-Ion Batteries
AU - Cervantes, J. M.
AU - Pilo, J.
AU - Rosas-Huerta, J. L.
AU - Antonio, J. E.
AU - Munoz, H.
AU - Oviedo-Roa, R.
AU - Carvajal, E.
N1 - Publisher Copyright:
© 2021 The Electrochemical Society ("ECS"). Published on behalf of ECS by IOP Publishing Limited.
PY - 2021/8
Y1 - 2021/8
N2 - Lithium lanthanum titanate perovskites Li x La1-x TiO3 (LLTO) are promising solid-electrolytes for Li-ion batteries. We studied, in the Density-Functional-Theory framework, the thermodynamic stability and the electronic and magnetic properties of LLTO, as bulk materials and as thin slabs with (001) exposed surfaces. Results show that LaTiO3 (LTO) exhibits semiconductor behavior and G-type antiferromagnetic order (AFMG), whereas the TiO2-terminated LTO slab is a semiconductor with ferromagnetic (FM) order. Contrasting, the LTO slab exposing a LaO-terminated surface is a conductor with AFMG ordered Ti cations' magnetic moments (MMs), but at the surface there are some FM ordered MMs (La atoms). LLTO bulk electrolyte is a semiconductor (x = 0.25) or insulator (x = 0.50). The LLTO slab is a FM (non-magnetic) conductor (TiO2 (LiO)-terminated surface) or a FM semiconductor (LaO-terminated). Besides, the stability of the LLTO bulk and slabs structures was analyzed, as well as the slabs' preferences for LiO, LaO or TiO2 ends.
AB - Lithium lanthanum titanate perovskites Li x La1-x TiO3 (LLTO) are promising solid-electrolytes for Li-ion batteries. We studied, in the Density-Functional-Theory framework, the thermodynamic stability and the electronic and magnetic properties of LLTO, as bulk materials and as thin slabs with (001) exposed surfaces. Results show that LaTiO3 (LTO) exhibits semiconductor behavior and G-type antiferromagnetic order (AFMG), whereas the TiO2-terminated LTO slab is a semiconductor with ferromagnetic (FM) order. Contrasting, the LTO slab exposing a LaO-terminated surface is a conductor with AFMG ordered Ti cations' magnetic moments (MMs), but at the surface there are some FM ordered MMs (La atoms). LLTO bulk electrolyte is a semiconductor (x = 0.25) or insulator (x = 0.50). The LLTO slab is a FM (non-magnetic) conductor (TiO2 (LiO)-terminated surface) or a FM semiconductor (LaO-terminated). Besides, the stability of the LLTO bulk and slabs structures was analyzed, as well as the slabs' preferences for LiO, LaO or TiO2 ends.
UR - http://www.scopus.com/inward/record.url?scp=85113344449&partnerID=8YFLogxK
U2 - 10.1149/1945-7111/ac1a52
DO - 10.1149/1945-7111/ac1a52
M3 - Artículo
AN - SCOPUS:85113344449
SN - 0013-4651
VL - 168
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
IS - 8
M1 - 080516
ER -