Probing the Effect of Titanium Substitution on the Sodium Storage in Na<sub>3</sub>Ni<sub>2</sub>BiO<sub>6</sub> Honeycomb-Type Structure
Na<sub>3</sub>Ni<sub>2</sub>BiO<sub>6</sub> with Honeycomb structure suffers from poor cycle stability when applied as cathode material for sodium-ion batteries. Herein, the strategy to improve the stability is to substitute Ni and Bi with inactive Ti. Monoclinic...
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MDPI AG
2020-12-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/13/24/6498 |
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| author | Eugen Zemlyanushin Kristina Pfeifer Angelina Sarapulova Martin Etter Helmut Ehrenberg Sonia Dsoke |
| author_facet | Eugen Zemlyanushin Kristina Pfeifer Angelina Sarapulova Martin Etter Helmut Ehrenberg Sonia Dsoke |
| author_sort | Eugen Zemlyanushin |
| collection | DOAJ |
| description | Na<sub>3</sub>Ni<sub>2</sub>BiO<sub>6</sub> with Honeycomb structure suffers from poor cycle stability when applied as cathode material for sodium-ion batteries. Herein, the strategy to improve the stability is to substitute Ni and Bi with inactive Ti. Monoclinic Na<sub>3</sub>Ni<sub>2-x</sub>Bi<sub>1-y</sub>Ti<sub>x+y</sub>O<sub>6</sub> powders with different Ti content were successfully synthesized via sol gel method, and 0.3 mol of Ti was determined as a maximum concentration to obtain a phase-pure compound. A solid-solution in the system of O3-NaNi<sub>0.5</sub>Ti<sub>0.5</sub>O<sub>2</sub> and O3-Na<sub>3</sub>Ni<sub>2</sub>BiO<sub>6</sub> is obtained when this critical concentration is not exceeded. The capacity of the first desodiation process at 0.1 C of Na<sub>3</sub>Ni<sub>2</sub>BiO<sub>6</sub> (~93 mAh g<sup>−1</sup>) decreases with the increasing Ti concentration to ~77 mAh g<sup>−1</sup> for Na<sub>3</sub>Ni<sub>2</sub>Bi<sub>0.9</sub>Ti<sub>0.1</sub>O<sub>6</sub> and to ~82 mAh g<sup>−1</sup> for Na<sub>3</sub>Ni<sub>0.9</sub>Bi<sub>0.8</sub>Ti<sub>0.3</sub>O<sub>6</sub>, respectively. After 100 cycles at 1 C, a better electrochemical kinetics is obtained for the Ti-containing structures, where a fast diffusion effect of Na<sup>+</sup>-ions is more pronounced. As a result of <i>in operando</i> synchrotron radiation diffraction, during the first sodiation (O1-P3-O’3-O3) the O’3 phase, which is formed in the Na<sub>3</sub>Ni<sub>2</sub>BiO<sub>6</sub> is fully or partly replaced by P’3 phase in the Ti substituted compounds. This leads to an improvement in the kinetics of the electrochemical process. The pathway through prismatic sites of Na<sup>+</sup>-ions in the P’3 phase seems to be more favourable than through octahedral sites of O’3 phase. Additionally, at high potential, a partial suppression of the reversible phase transition P3-O1-P3 is revealed. |
| first_indexed | 2024-03-10T14:13:24Z |
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| id | doaj.art-21e493748ac54ce69716a436926a92b2 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T14:13:24Z |
| publishDate | 2020-12-01 |
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| series | Energies |
| spelling | doaj.art-21e493748ac54ce69716a436926a92b22023-11-20T23:59:32ZengMDPI AGEnergies1996-10732020-12-011324649810.3390/en13246498Probing the Effect of Titanium Substitution on the Sodium Storage in Na<sub>3</sub>Ni<sub>2</sub>BiO<sub>6</sub> Honeycomb-Type StructureEugen Zemlyanushin0Kristina Pfeifer1Angelina Sarapulova2Martin Etter3Helmut Ehrenberg4Sonia Dsoke5Institute for Applied Materials (IAM) Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, GermanyInstitute for Applied Materials (IAM) Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, GermanyInstitute for Applied Materials (IAM) Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, GermanyDeutsches Elektronen-Synchrotron (DESY), Notkestraße 85, D-22607 Hamburg, GermanyInstitute for Applied Materials (IAM) Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, GermanyInstitute for Applied Materials (IAM) Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz Platz 1, 76344 Eggenstein-Leopoldshafen, GermanyNa<sub>3</sub>Ni<sub>2</sub>BiO<sub>6</sub> with Honeycomb structure suffers from poor cycle stability when applied as cathode material for sodium-ion batteries. Herein, the strategy to improve the stability is to substitute Ni and Bi with inactive Ti. Monoclinic Na<sub>3</sub>Ni<sub>2-x</sub>Bi<sub>1-y</sub>Ti<sub>x+y</sub>O<sub>6</sub> powders with different Ti content were successfully synthesized via sol gel method, and 0.3 mol of Ti was determined as a maximum concentration to obtain a phase-pure compound. A solid-solution in the system of O3-NaNi<sub>0.5</sub>Ti<sub>0.5</sub>O<sub>2</sub> and O3-Na<sub>3</sub>Ni<sub>2</sub>BiO<sub>6</sub> is obtained when this critical concentration is not exceeded. The capacity of the first desodiation process at 0.1 C of Na<sub>3</sub>Ni<sub>2</sub>BiO<sub>6</sub> (~93 mAh g<sup>−1</sup>) decreases with the increasing Ti concentration to ~77 mAh g<sup>−1</sup> for Na<sub>3</sub>Ni<sub>2</sub>Bi<sub>0.9</sub>Ti<sub>0.1</sub>O<sub>6</sub> and to ~82 mAh g<sup>−1</sup> for Na<sub>3</sub>Ni<sub>0.9</sub>Bi<sub>0.8</sub>Ti<sub>0.3</sub>O<sub>6</sub>, respectively. After 100 cycles at 1 C, a better electrochemical kinetics is obtained for the Ti-containing structures, where a fast diffusion effect of Na<sup>+</sup>-ions is more pronounced. As a result of <i>in operando</i> synchrotron radiation diffraction, during the first sodiation (O1-P3-O’3-O3) the O’3 phase, which is formed in the Na<sub>3</sub>Ni<sub>2</sub>BiO<sub>6</sub> is fully or partly replaced by P’3 phase in the Ti substituted compounds. This leads to an improvement in the kinetics of the electrochemical process. The pathway through prismatic sites of Na<sup>+</sup>-ions in the P’3 phase seems to be more favourable than through octahedral sites of O’3 phase. Additionally, at high potential, a partial suppression of the reversible phase transition P3-O1-P3 is revealed.https://www.mdpi.com/1996-1073/13/24/6498sodium-ion batterieshoneycomb-layersolid-solutioncathode material |
| spellingShingle | Eugen Zemlyanushin Kristina Pfeifer Angelina Sarapulova Martin Etter Helmut Ehrenberg Sonia Dsoke Probing the Effect of Titanium Substitution on the Sodium Storage in Na<sub>3</sub>Ni<sub>2</sub>BiO<sub>6</sub> Honeycomb-Type Structure Energies sodium-ion batteries honeycomb-layer solid-solution cathode material |
| title | Probing the Effect of Titanium Substitution on the Sodium Storage in Na<sub>3</sub>Ni<sub>2</sub>BiO<sub>6</sub> Honeycomb-Type Structure |
| title_full | Probing the Effect of Titanium Substitution on the Sodium Storage in Na<sub>3</sub>Ni<sub>2</sub>BiO<sub>6</sub> Honeycomb-Type Structure |
| title_fullStr | Probing the Effect of Titanium Substitution on the Sodium Storage in Na<sub>3</sub>Ni<sub>2</sub>BiO<sub>6</sub> Honeycomb-Type Structure |
| title_full_unstemmed | Probing the Effect of Titanium Substitution on the Sodium Storage in Na<sub>3</sub>Ni<sub>2</sub>BiO<sub>6</sub> Honeycomb-Type Structure |
| title_short | Probing the Effect of Titanium Substitution on the Sodium Storage in Na<sub>3</sub>Ni<sub>2</sub>BiO<sub>6</sub> Honeycomb-Type Structure |
| title_sort | probing the effect of titanium substitution on the sodium storage in na sub 3 sub ni sub 2 sub bio sub 6 sub honeycomb type structure |
| topic | sodium-ion batteries honeycomb-layer solid-solution cathode material |
| url | https://www.mdpi.com/1996-1073/13/24/6498 |
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