Investigation into Lithium-Ion Conductivity and Redox Stability of Selenium-Doped Lithium Lanthanum Titanate
Selenium-doped lithium lanthanum titanate of composition Li₀.₃₃La₀.₅₆Ti₁₋ₓSeₓO3 (x = 0, 0.025, 0.050, 0.075) was attempted using a two-step conventional synthesis process to investigate the potential of the material as a solid-state electrolyte in lithium-ion batteries. Impedance spectroscopy data y...
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| Format: | Thesis |
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Massachusetts Institute of Technology
2023
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| Online Access: | https://hdl.handle.net/1721.1/151906 |
| _version_ | 1811077408098353152 |
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| author | Hu, Lambert |
| author2 | Shao-Horn, Yang |
| author_facet | Shao-Horn, Yang Hu, Lambert |
| author_sort | Hu, Lambert |
| collection | MIT |
| description | Selenium-doped lithium lanthanum titanate of composition Li₀.₃₃La₀.₅₆Ti₁₋ₓSeₓO3 (x = 0, 0.025, 0.050, 0.075) was attempted using a two-step conventional synthesis process to investigate the potential of the material as a solid-state electrolyte in lithium-ion batteries. Impedance spectroscopy data yielded a maximum room temperature bulk conductivity of (1.73 ± 0.10) x 10⁻³ S cm⁻¹ (EBulk = 0.35 ± 0.03 eV) and grain boundary conductivity of (1.20 ± 0.10) x 10⁻⁴ S cm⁻¹ (EGB = 0.37 ± 0.01 eV) for nominal composition x = 0.050. Preliminary stability measurements through three-electrode cyclic voltammetry suggests potential for LLTO stabilization against Li metal anode through further selenium substitution. However, further work is required to confirm the exact elemental composition of selenium-doped samples. |
| first_indexed | 2024-09-23T10:42:32Z |
| format | Thesis |
| id | mit-1721.1/151906 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T10:42:32Z |
| publishDate | 2023 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/1519062023-08-24T03:40:21Z Investigation into Lithium-Ion Conductivity and Redox Stability of Selenium-Doped Lithium Lanthanum Titanate Hu, Lambert Shao-Horn, Yang Massachusetts Institute of Technology. Department of Mechanical Engineering Selenium-doped lithium lanthanum titanate of composition Li₀.₃₃La₀.₅₆Ti₁₋ₓSeₓO3 (x = 0, 0.025, 0.050, 0.075) was attempted using a two-step conventional synthesis process to investigate the potential of the material as a solid-state electrolyte in lithium-ion batteries. Impedance spectroscopy data yielded a maximum room temperature bulk conductivity of (1.73 ± 0.10) x 10⁻³ S cm⁻¹ (EBulk = 0.35 ± 0.03 eV) and grain boundary conductivity of (1.20 ± 0.10) x 10⁻⁴ S cm⁻¹ (EGB = 0.37 ± 0.01 eV) for nominal composition x = 0.050. Preliminary stability measurements through three-electrode cyclic voltammetry suggests potential for LLTO stabilization against Li metal anode through further selenium substitution. However, further work is required to confirm the exact elemental composition of selenium-doped samples. S.B. 2023-08-23T16:18:02Z 2023-08-23T16:18:02Z 2023-06 2023-07-18T16:17:19.854Z Thesis https://hdl.handle.net/1721.1/151906 In Copyright - Educational Use Permitted Copyright retained by author(s) https://rightsstatements.org/page/InC-EDU/1.0/ application/pdf Massachusetts Institute of Technology |
| spellingShingle | Hu, Lambert Investigation into Lithium-Ion Conductivity and Redox Stability of Selenium-Doped Lithium Lanthanum Titanate |
| title | Investigation into Lithium-Ion Conductivity and Redox Stability of Selenium-Doped Lithium Lanthanum Titanate |
| title_full | Investigation into Lithium-Ion Conductivity and Redox Stability of Selenium-Doped Lithium Lanthanum Titanate |
| title_fullStr | Investigation into Lithium-Ion Conductivity and Redox Stability of Selenium-Doped Lithium Lanthanum Titanate |
| title_full_unstemmed | Investigation into Lithium-Ion Conductivity and Redox Stability of Selenium-Doped Lithium Lanthanum Titanate |
| title_short | Investigation into Lithium-Ion Conductivity and Redox Stability of Selenium-Doped Lithium Lanthanum Titanate |
| title_sort | investigation into lithium ion conductivity and redox stability of selenium doped lithium lanthanum titanate |
| url | https://hdl.handle.net/1721.1/151906 |
| work_keys_str_mv | AT hulambert investigationintolithiumionconductivityandredoxstabilityofseleniumdopedlithiumlanthanumtitanate |