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Zhou Z, Cazorla C, Gao B, Luong HD, Momma T, Tateyama Y. First-Principles Study on the Interplay of Strain and State-of-Charge with Li-Ion Diffusion in the Battery Cathode Material LiCoO 2. ACS APPLIED MATERIALS & INTERFACES 2023; 15:53614-53622. [PMID: 37944111 PMCID: PMC10685353 DOI: 10.1021/acsami.3c14444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 10/20/2023] [Accepted: 10/24/2023] [Indexed: 11/12/2023]
Abstract
Cathode degradation of Li-ion batteries (Li+) continues to be a crucial issue for higher energy density. A main cause of this degradation is strain due to stress induced by structural changes according to the state-of-charge (SOC). Moreover, in solid-state batteries, a mismatch between incompatible cathode/electrolyte interfaces also generates a strain effect. In this respect, understanding the effects of the mechanical/elastic phenomena associated with SOC on the cathode performance, such as voltage and Li+ diffusion, is essential. In this work, we focused on LiCoO2 (LCO), a representative LIB cathode material, and investigated the effects of biaxial strain and hydrostatic pressure on its layered structure and Li+ transport properties through first-principles calculations. With the nudged elastic band technique and molecular dynamics, we demonstrated that in Li-deficient LCO, compressive biaxial strain increases the Li+ diffusivity, whereas tensile biaxial strain and hydrostatic pressure tend to suppress it. Structural parameter analysis revealed the key correlation of "Co layer distances" with Li+ diffusion instead of "Li layer distances", as ordinarily expected. Structural analysis further revealed the interplay between the Li-Li Coulomb interaction, SOC, and Li+ diffusion in LCO. The activation volume of LCO under hydrostatic pressure was reported for the first time. Moreover, vacancy formation energy calculations showed that the Li intercalation potential could be decreased under compressive biaxial strain due to the weakening of the Li-O bond interaction. The present findings may serve to improve the control of the energy density performance of layered cathode materials.
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Affiliation(s)
- Zizhen Zhou
- Graduate
School of Advanced Science and Engineering, Waseda University, 3-4-1,
Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
- Research
Center for Energy and Environmental Materials (GREEN), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Claudio Cazorla
- Departament
de Física, Universitat Politècnica
de Catalunya, Campus Nord B4−B5, E-08034 Barcelona, Spain
| | - Bo Gao
- Research
Center for Energy and Environmental Materials (GREEN), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
- College
of Materials Science and Engineering, Jilin
University, Changchun, Jilin 130012, People’s Republic of China
| | - Huu Duc Luong
- Research
Center for Energy and Environmental Materials (GREEN), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Toshiyuki Momma
- Graduate
School of Advanced Science and Engineering, Waseda University, 3-4-1,
Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Yoshitaka Tateyama
- Graduate
School of Advanced Science and Engineering, Waseda University, 3-4-1,
Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
- Research
Center for Energy and Environmental Materials (GREEN), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
- Laboratory
for Chemistry and Life Science, Tokyo Institute
of Technology, 4259 Nagatsuta-cho,
Midori-ku, Yokohama 226-8503, Japan
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The Conundrum of Relaxation Volumes in First-Principles Calculations of Charged Defects in UO2. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9245276] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The defect relaxation volumes obtained from density-functional theory (DFT) calculations of charged vacancies and interstitials are much larger than their neutral counterparts, seemingly unphysically large. We focus on UO2 as our primary material of interest, but also consider Si and GaAs to reveal the generality of our results. In this work, we investigate the possible reasons for this and revisit the methods that address the calculation of charged defects in periodic DFT. We probe the dependence of the proposed energy corrections to charged defect formation energies on relaxation volumes and find that corrections such as potential alignment remain ambiguous with regards to its contribution to the charged defect relaxation volume. We also investigate the volume for the net neutral defect reactions comprising individual charged defects, and find that the aggregate formation volumes have reasonable magnitudes. This work highlights the issue that, as is well-known for defect formation energies, the defect formation volumes depend on the choice of reservoir. We show that considering the change in volume of the electron reservoir in the formation reaction of the charged defects, analogous to how volumes of atoms are accounted for in defect formation volumes, can renormalize the formation volumes of charged defects such that they are comparable to neutral defects. This approach enables the description of the elastic properties of isolated charged defects within an overall neutral material.
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Das T, Nicholas JD, Sheldon BW, Qi Y. Anisotropic chemical strain in cubic ceria due to oxygen-vacancy-induced elastic dipoles. Phys Chem Chem Phys 2018; 20:15293-15299. [DOI: 10.1039/c8cp01219a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Accurate characterization of chemical strain is required to study a broad range of chemical–mechanical coupling phenomena.
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Affiliation(s)
- Tridip Das
- Chemical Engineering & Materials Science Department
- Michigan State University
- East Lansing
- USA
| | - Jason D. Nicholas
- Chemical Engineering & Materials Science Department
- Michigan State University
- East Lansing
- USA
| | | | - Yue Qi
- Chemical Engineering & Materials Science Department
- Michigan State University
- East Lansing
- USA
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James C, Wu Y, Sheldon B, Qi Y. Computational Analysis of Coupled Anisotropic Chemical Expansion in Li2-XMnO3-δ. ACTA ACUST UNITED AC 2016. [DOI: 10.1557/adv.2016.48] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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6
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Kassem ME, Gomaa NG, El-Khatib AM, Kandil SH. Fast Neutron Irradiation and Thermal Properties of Doped Nonstoichiometric Lithium Potassium Sulphate Crystals. ACTA ACUST UNITED AC 1990. [DOI: 10.1002/pssa.2211170112] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Cade PE, Stoneham AM, Tasker PW. Effects of pressure on the VK center in KCl. PHYSICAL REVIEW. B, CONDENSED MATTER 1986; 33:4166-4171. [PMID: 9938841 DOI: 10.1103/physrevb.33.4166] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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