Delithiated states of layered cathode materials: doping and dispersion interaction effects on the structure
Here we present results of density functional theory (DFT) study of delithiated structures of layered LiNiO2 (LNO, Li12Ni12O24 model) cathode material and its doped analogue LiNi 0.833 Co 0.083 Al 0.083O2 (N 10 C 1 A 1 , Li 12 Ni 10 CoAlO 24 model). The paper is aimed at independent elucidation of d...
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Published in: | EPJ Web of Conferences Vol. 177; p. 2001 |
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Abstract | Here we present results of density functional theory (DFT) study of delithiated structures of layered LiNiO2 (LNO, Li12Ni12O24 model) cathode material and its doped analogue LiNi
0.833
Co
0.083
Al
0.083O2
(N
10
C
1
A
1
, Li
12
Ni
10
CoAlO
24
model). The paper is aimed at independent elucidation of doping and dispersion interaction effects on the structural stability of cathode materials studied. For this purpose, the LNO and N
10
C
1
A
1
configurational spaces consisting of 87 and 4512 crystallographically independent configurations (obtained starting from 2×2×1 supercell of R-3m structure of LNO) are optimized within a number of DFT models. Based on a comparison of the calculated dependencies for the lattice parameters with the results of in situ neutron diffraction experiments, the most pronounced effect of cathode material stabilization is due to the dispersion interaction. In turn, the doping effect is found to affect cathode structure behavior at the latest stages of delithiation only. |
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AbstractList | Here we present results of density functional theory (DFT) study of delithiated structures of layered LiNiO2 (LNO, Li12Ni12O24 model) cathode material and its doped analogue LiNi
0.833
Co
0.083
Al
0.083O2
(N
10
C
1
A
1
, Li
12
Ni
10
CoAlO
24
model). The paper is aimed at independent elucidation of doping and dispersion interaction effects on the structural stability of cathode materials studied. For this purpose, the LNO and N
10
C
1
A
1
configurational spaces consisting of 87 and 4512 crystallographically independent configurations (obtained starting from 2×2×1 supercell of R-3m structure of LNO) are optimized within a number of DFT models. Based on a comparison of the calculated dependencies for the lattice parameters with the results of in situ neutron diffraction experiments, the most pronounced effect of cathode material stabilization is due to the dispersion interaction. In turn, the doping effect is found to affect cathode structure behavior at the latest stages of delithiation only. Here we present results of density functional theory (DFT) study of delithiated structures of layered LiNiO2 (LNO, Li12Ni12O24 model) cathode material and its doped analogue LiNi0.833Co0.083Al0.083O2 (N10C1A1, Li12Ni10CoAlO24 model). The paper is aimed at independent elucidation of doping and dispersion interaction effects on the structural stability of cathode materials studied. For this purpose, the LNO and N10C1A1 configurational spaces consisting of 87 and 4512 crystallographically independent configurations (obtained starting from 2×2×1 supercell of R-3m structure of LNO) are optimized within a number of DFT models. Based on a comparison of the calculated dependencies for the lattice parameters with the results of in situ neutron diffraction experiments, the most pronounced effect of cathode material stabilization is due to the dispersion interaction. In turn, the doping effect is found to affect cathode structure behavior at the latest stages of delithiation only. |
Author | Eremin, Roman Zolotarev, Pavel Bobrikov, Ivan |
Author_xml | – sequence: 1 givenname: Roman surname: Eremin fullname: Eremin, Roman – sequence: 2 givenname: Pavel surname: Zolotarev fullname: Zolotarev, Pavel – sequence: 3 givenname: Ivan surname: Bobrikov fullname: Bobrikov, Ivan |
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SubjectTerms | Cathodes Crystallography Density functional theory Dispersion Doping Electrode materials Lattice parameters Neutron diffraction Structural stability |
Title | Delithiated states of layered cathode materials: doping and dispersion interaction effects on the structure |
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