TY - JOUR
T1 - Li/Na atoms' substitution effects on the structural, electronic, and mechanical properties of the CaSnO3 perovskite for battery applications
AU - Antonio, J. E.
AU - Rosas-Huerta, J. L.
AU - Cervantes, J. M.
AU - León-Flores, J.
AU - Romero, M.
AU - Carvajal, E.
AU - Escamilla, R.
N1 - Publisher Copyright:
© 2022
PY - 2023/2/25
Y1 - 2023/2/25
N2 - Calcium stannate perovskite CaSnO3 (CSO) is an interesting material for lithium- and sodium-ion batteries (LIBs and SIBs), due to their high hardness and mechanical resistance. In this work, we systematically investigate the effects of substituting lithium/sodium (Li/Na) atoms on the structural, electronic, and mechanical properties of LixCa1-xSnO3 and NaxCa1-xSnO3 perovskite compounds with concentrations × = 0.00, 0.25 and 0.50 using DFT-based in the generalized gradient approximation (GGA) and norm-conserving pseudopotential. This allows describing which substitution generates optimal conditions for structural, mechanical stability, and electronic properties for the CSO perovskite. Lattice parameters behavior as a function of the concentration shows a gradual decrease (increase) in a and c as Li (Na) amount increases. The Na configurations show a small volumetric expansion, on the other hand, the Li configurations have contractions. According to the cohesive energy analysis, it is demonstrated that Li concentrations are more stable than Na ones. The electronic band structure shows that all the Li and Na configurations have a metallic behavior. Finally, the mechanical properties indicate that Na degrades in a less proportion than the Li-substituted compounds; these results demonstrate that SIBs are more favorable than LIBs.
AB - Calcium stannate perovskite CaSnO3 (CSO) is an interesting material for lithium- and sodium-ion batteries (LIBs and SIBs), due to their high hardness and mechanical resistance. In this work, we systematically investigate the effects of substituting lithium/sodium (Li/Na) atoms on the structural, electronic, and mechanical properties of LixCa1-xSnO3 and NaxCa1-xSnO3 perovskite compounds with concentrations × = 0.00, 0.25 and 0.50 using DFT-based in the generalized gradient approximation (GGA) and norm-conserving pseudopotential. This allows describing which substitution generates optimal conditions for structural, mechanical stability, and electronic properties for the CSO perovskite. Lattice parameters behavior as a function of the concentration shows a gradual decrease (increase) in a and c as Li (Na) amount increases. The Na configurations show a small volumetric expansion, on the other hand, the Li configurations have contractions. According to the cohesive energy analysis, it is demonstrated that Li concentrations are more stable than Na ones. The electronic band structure shows that all the Li and Na configurations have a metallic behavior. Finally, the mechanical properties indicate that Na degrades in a less proportion than the Li-substituted compounds; these results demonstrate that SIBs are more favorable than LIBs.
KW - Batteries
KW - CaSnO
KW - DFT
KW - Elastic properties
KW - Electronic properties
UR - http://www.scopus.com/inward/record.url?scp=85145251646&partnerID=8YFLogxK
U2 - 10.1016/j.commatsci.2022.112006
DO - 10.1016/j.commatsci.2022.112006
M3 - Artículo
AN - SCOPUS:85145251646
SN - 0927-0256
VL - 219
JO - Computational Materials Science
JF - Computational Materials Science
M1 - 112006
ER -