Synthesis of well-crystallized Li4Ti5O12 nanoplates for lithium-ion batteries with outstanding rate capability and cycling stability
As a lithium-intercalation material, high crystallinity is important for Li4Ti5O12 to achieve good capacity and cycling stability, while a large surface area and a short lithium diffusion distance are critical to increase rate capacity. In this study, well-crystallized Li 4Ti5O12 nanoplates with out...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/30873 |
| _version_ | 1848753214577442816 |
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| author | Sha, Y. Zhao, B. Ran, R. Cai, R. Shao, Zongping |
| author_facet | Sha, Y. Zhao, B. Ran, R. Cai, R. Shao, Zongping |
| author_sort | Sha, Y. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | As a lithium-intercalation material, high crystallinity is important for Li4Ti5O12 to achieve good capacity and cycling stability, while a large surface area and a short lithium diffusion distance are critical to increase rate capacity. In this study, well-crystallized Li 4Ti5O12 nanoplates with outstanding electrochemical performance were facially prepared through a two-step hydrothermal preparation with benzyl alcohol-NH3·H 2O (BN) as the solvent and a subsequent intermediate-temperature calcination at 500 °C for 2 h in air. To support the superiority of benzyl alcohol-NH3·H2O (BN) for hydrothermal synthesis, ethanol-NH3·H2O (EN) was also comparatively studied as solvent. In addition, different hydrothermal reaction times were tried to locate the optimal reaction time. The nature of as-prepared Li 4Ti5O12-BN (LTO-BN) and Li4Ti 5O12-EN (LTO-EN) was characterized by XRD, N2 adsorption/desorption tests, SEM, TEM and TGA-DSC. Compared with EN, the BN hydrothermal solvent facilitated the formation of nanosheet-Li 4Ti5O12 with wall thicknesses of 8-15 nm and better crystallization. After a 6 h hydrothermal reaction at 180 °C and subsequent calcination, well-crystallized Li4Ti5O 12-BN nanoplates were produced, which demonstrate a superior discharge capacity of 160 mA h g-1, even at 40 C, maintaining a capacity of 88.8% compared with that at 1 C. The nanoplates also exhibited excellent cycling stability, retaining a discharge capacity of 153 mA h g -1 after 1000 charge-discharge cycles at 10 C. © 2013 The Royal Society of Chemistry. |
| first_indexed | 2025-11-14T08:20:57Z |
| format | Journal Article |
| id | curtin-20.500.11937-30873 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:20:57Z |
| publishDate | 2013 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-308732017-09-13T15:11:17Z Synthesis of well-crystallized Li4Ti5O12 nanoplates for lithium-ion batteries with outstanding rate capability and cycling stability Sha, Y. Zhao, B. Ran, R. Cai, R. Shao, Zongping As a lithium-intercalation material, high crystallinity is important for Li4Ti5O12 to achieve good capacity and cycling stability, while a large surface area and a short lithium diffusion distance are critical to increase rate capacity. In this study, well-crystallized Li 4Ti5O12 nanoplates with outstanding electrochemical performance were facially prepared through a two-step hydrothermal preparation with benzyl alcohol-NH3·H 2O (BN) as the solvent and a subsequent intermediate-temperature calcination at 500 °C for 2 h in air. To support the superiority of benzyl alcohol-NH3·H2O (BN) for hydrothermal synthesis, ethanol-NH3·H2O (EN) was also comparatively studied as solvent. In addition, different hydrothermal reaction times were tried to locate the optimal reaction time. The nature of as-prepared Li 4Ti5O12-BN (LTO-BN) and Li4Ti 5O12-EN (LTO-EN) was characterized by XRD, N2 adsorption/desorption tests, SEM, TEM and TGA-DSC. Compared with EN, the BN hydrothermal solvent facilitated the formation of nanosheet-Li 4Ti5O12 with wall thicknesses of 8-15 nm and better crystallization. After a 6 h hydrothermal reaction at 180 °C and subsequent calcination, well-crystallized Li4Ti5O 12-BN nanoplates were produced, which demonstrate a superior discharge capacity of 160 mA h g-1, even at 40 C, maintaining a capacity of 88.8% compared with that at 1 C. The nanoplates also exhibited excellent cycling stability, retaining a discharge capacity of 153 mA h g -1 after 1000 charge-discharge cycles at 10 C. © 2013 The Royal Society of Chemistry. 2013 Journal Article http://hdl.handle.net/20.500.11937/30873 10.1039/c3ta12620j restricted |
| spellingShingle | Sha, Y. Zhao, B. Ran, R. Cai, R. Shao, Zongping Synthesis of well-crystallized Li4Ti5O12 nanoplates for lithium-ion batteries with outstanding rate capability and cycling stability |
| title | Synthesis of well-crystallized Li4Ti5O12 nanoplates for lithium-ion batteries with outstanding rate capability and cycling stability |
| title_full | Synthesis of well-crystallized Li4Ti5O12 nanoplates for lithium-ion batteries with outstanding rate capability and cycling stability |
| title_fullStr | Synthesis of well-crystallized Li4Ti5O12 nanoplates for lithium-ion batteries with outstanding rate capability and cycling stability |
| title_full_unstemmed | Synthesis of well-crystallized Li4Ti5O12 nanoplates for lithium-ion batteries with outstanding rate capability and cycling stability |
| title_short | Synthesis of well-crystallized Li4Ti5O12 nanoplates for lithium-ion batteries with outstanding rate capability and cycling stability |
| title_sort | synthesis of well-crystallized li4ti5o12 nanoplates for lithium-ion batteries with outstanding rate capability and cycling stability |
| url | http://hdl.handle.net/20.500.11937/30873 |