The effect of synthesis temperature on the properties of TiO2 (B) nanorods and its precursors as anode materials for lithium-ion batteries
In this work, we carried out a detailed research on the effect of synthesis temperature on the properties of TiO _2 (B) nanorods and its hydrogen titanate precursors. At the initial stage, hydrogen titanates (HTOs) were synthesised at different temperatures (140 °C–180 °C). The HTO materials were th...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/ab61bc |
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| author | Ntombizodwa M Ncube Haitao Zheng |
| author_facet | Ntombizodwa M Ncube Haitao Zheng |
| author_sort | Ntombizodwa M Ncube |
| collection | DOAJ |
| description | In this work, we carried out a detailed research on the effect of synthesis temperature on the properties of TiO _2 (B) nanorods and its hydrogen titanate precursors. At the initial stage, hydrogen titanates (HTOs) were synthesised at different temperatures (140 °C–180 °C). The HTO materials were then annealed at 400 °C for 2 h in the second-stage to produce TiO _2 (B) nanorods. It is interesting to note that the pure anatase phase of TiO _2 nanorods (TO140) was achieved from the HTO material (HTO140) prepared at 140 °C, while the TiO _2 (B) nanorods were only formed from those synthesised at 160 °C (HTO160) and 180 °C (HTO180). In the evaluation of these materials as anodes for lithium ion batteries (LIBs), HTO140 showed better rate performance at higher current rates (500–1000 mAg ^−1 ). However, HTO160 and HTO180 displayed lower initial discharge capacities than that of their precursor (the commercial TO) at 200 mAg ^−1 . Addtionally, HTO160 exhibited the best stability with 71.5% retention after 100 cycles at 200 mAg ^−1 . Moreover, the annealed product of TO140 from HTO140 demonstrated the highest initial discharge capacity with a value of 164.3 mAhg ^−1 at a current of 200 mAg ^−1 , which is corresponding to its low charge transfer resistance. However, TO160 showed a superior stability with 92.3% retained capacity after 100 cycles at 200 mAg ^−1 . Overall, 160 °C is the optimum temperature to synthesize TiO _2 (B) nanorods, regarding to its good cycling stability and mild capacity as anode materials. The investigation showed that the synthesis temperature is a determining factor to producing either TiO _2 (B) or anatase TiO _2 nanorods, has an influence on the properties of the precursor as well as the TiO _2 (B) as anode materials for LIBs. |
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| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:47:12Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-9b65e77fcfc442e7b43765bc1b3c4be22023-08-09T15:24:23ZengIOP PublishingMaterials Research Express2053-15912020-01-017101550410.1088/2053-1591/ab61bcThe effect of synthesis temperature on the properties of TiO2 (B) nanorods and its precursors as anode materials for lithium-ion batteriesNtombizodwa M Ncube0Haitao Zheng1https://orcid.org/0000-0003-4180-0197Energy Centre, Council for Scientific and Industrial Research (CSIR), PO Box 395, Pretoria, 0001, South AfricaEnergy Centre, Council for Scientific and Industrial Research (CSIR), PO Box 395, Pretoria, 0001, South AfricaIn this work, we carried out a detailed research on the effect of synthesis temperature on the properties of TiO _2 (B) nanorods and its hydrogen titanate precursors. At the initial stage, hydrogen titanates (HTOs) were synthesised at different temperatures (140 °C–180 °C). The HTO materials were then annealed at 400 °C for 2 h in the second-stage to produce TiO _2 (B) nanorods. It is interesting to note that the pure anatase phase of TiO _2 nanorods (TO140) was achieved from the HTO material (HTO140) prepared at 140 °C, while the TiO _2 (B) nanorods were only formed from those synthesised at 160 °C (HTO160) and 180 °C (HTO180). In the evaluation of these materials as anodes for lithium ion batteries (LIBs), HTO140 showed better rate performance at higher current rates (500–1000 mAg ^−1 ). However, HTO160 and HTO180 displayed lower initial discharge capacities than that of their precursor (the commercial TO) at 200 mAg ^−1 . Addtionally, HTO160 exhibited the best stability with 71.5% retention after 100 cycles at 200 mAg ^−1 . Moreover, the annealed product of TO140 from HTO140 demonstrated the highest initial discharge capacity with a value of 164.3 mAhg ^−1 at a current of 200 mAg ^−1 , which is corresponding to its low charge transfer resistance. However, TO160 showed a superior stability with 92.3% retained capacity after 100 cycles at 200 mAg ^−1 . Overall, 160 °C is the optimum temperature to synthesize TiO _2 (B) nanorods, regarding to its good cycling stability and mild capacity as anode materials. The investigation showed that the synthesis temperature is a determining factor to producing either TiO _2 (B) or anatase TiO _2 nanorods, has an influence on the properties of the precursor as well as the TiO _2 (B) as anode materials for LIBs.https://doi.org/10.1088/2053-1591/ab61bchydrogen titanateTiO2(B)nanorodsanodelithium ion battery |
| spellingShingle | Ntombizodwa M Ncube Haitao Zheng The effect of synthesis temperature on the properties of TiO2 (B) nanorods and its precursors as anode materials for lithium-ion batteries Materials Research Express hydrogen titanate TiO2(B) nanorods anode lithium ion battery |
| title | The effect of synthesis temperature on the properties of TiO2 (B) nanorods and its precursors as anode materials for lithium-ion batteries |
| title_full | The effect of synthesis temperature on the properties of TiO2 (B) nanorods and its precursors as anode materials for lithium-ion batteries |
| title_fullStr | The effect of synthesis temperature on the properties of TiO2 (B) nanorods and its precursors as anode materials for lithium-ion batteries |
| title_full_unstemmed | The effect of synthesis temperature on the properties of TiO2 (B) nanorods and its precursors as anode materials for lithium-ion batteries |
| title_short | The effect of synthesis temperature on the properties of TiO2 (B) nanorods and its precursors as anode materials for lithium-ion batteries |
| title_sort | effect of synthesis temperature on the properties of tio2 b nanorods and its precursors as anode materials for lithium ion batteries |
| topic | hydrogen titanate TiO2(B) nanorods anode lithium ion battery |
| url | https://doi.org/10.1088/2053-1591/ab61bc |
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