Single-crystalline TiO2(B) nanobelts with unusual large exposed {100} facets and enhanced Li-storage capacity
The {100} facet of single-crystalline TiO2(B) is an ideal platform for inserting Li ions, but it is hard to be obtained due to its high surface energy. Here, the single-crystalline TiO2(B) nanobelts from H2Ti3O7 with nearly 70% {100} facets exposed are synthesized, which significantly enhances Li-st...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2021
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| Online Access: | https://hdl.handle.net/10356/154417 |
| _version_ | 1811691338700161024 |
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| author | Wang, Q. Shen, Lei Xue, Tong Cheng, Gao Huang, C. Z. Fan, Hong Jin Feng, Y. P. |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Wang, Q. Shen, Lei Xue, Tong Cheng, Gao Huang, C. Z. Fan, Hong Jin Feng, Y. P. |
| author_sort | Wang, Q. |
| collection | NTU |
| description | The {100} facet of single-crystalline TiO2(B) is an ideal platform for inserting Li ions, but it is hard to be obtained due to its high surface energy. Here, the single-crystalline TiO2(B) nanobelts from H2Ti3O7 with nearly 70% {100} facets exposed are synthesized, which significantly enhances Li-storage capacity. The first-principle calculations demonstrate an ab in-plane 2D diffusion through the exposed {100} facets. As a consequence, the nanobelts can significantly accommodate Li ions in LiTiO2 formula with specific capacity up to 335 mAh g−1, which is in good agreement with the electrochemical characterizations. Coating with conductive and protective poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate), the cut-off discharge voltage is as low as 0.5 V, leading to a capacity of 160.7 mAh g−1 after 1500 cycles with a retention rate of 66% at 1C. This work provides a practical strategy to increase the Li-ion capacity and cycle stability by tailoring the crystal orientation and nanostructures. |
| first_indexed | 2024-10-01T06:18:18Z |
| format | Journal Article |
| id | ntu-10356/154417 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:18:18Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1544172021-12-22T06:28:24Z Single-crystalline TiO2(B) nanobelts with unusual large exposed {100} facets and enhanced Li-storage capacity Wang, Q. Shen, Lei Xue, Tong Cheng, Gao Huang, C. Z. Fan, Hong Jin Feng, Y. P. School of Physical and Mathematical Sciences Department of Mechanical Engineering Science::Chemistry Crystal Facets First Principles The {100} facet of single-crystalline TiO2(B) is an ideal platform for inserting Li ions, but it is hard to be obtained due to its high surface energy. Here, the single-crystalline TiO2(B) nanobelts from H2Ti3O7 with nearly 70% {100} facets exposed are synthesized, which significantly enhances Li-storage capacity. The first-principle calculations demonstrate an ab in-plane 2D diffusion through the exposed {100} facets. As a consequence, the nanobelts can significantly accommodate Li ions in LiTiO2 formula with specific capacity up to 335 mAh g−1, which is in good agreement with the electrochemical characterizations. Coating with conductive and protective poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate), the cut-off discharge voltage is as low as 0.5 V, leading to a capacity of 160.7 mAh g−1 after 1500 cycles with a retention rate of 66% at 1C. This work provides a practical strategy to increase the Li-ion capacity and cycle stability by tailoring the crystal orientation and nanostructures. This work was financially supported by the National Natural Science Foundation of China (Grant No.: 21535006), the China Postdoctoral Science Foundation (2017M612886), the Fundamental Research Funds for the Central Universities (XDJK2019AA002 and XDJK2017B043), and Sino (Chongqing)-Singapore Joint Postdoctoral Promotion Program. Support from the Sino-Singapore International Joint Research Institute (JRI, Project Number: 204-A018002) is also appreciated. 2021-12-22T06:28:23Z 2021-12-22T06:28:23Z 2021 Journal Article Wang, Q., Shen, L., Xue, T., Cheng, G., Huang, C. Z., Fan, H. J. & Feng, Y. P. (2021). Single-crystalline TiO2(B) nanobelts with unusual large exposed {100} facets and enhanced Li-storage capacity. Advanced Functional Materials, 31(2), 2002187-. https://dx.doi.org/10.1002/adfm.202002187 1616-301X https://hdl.handle.net/10356/154417 10.1002/adfm.202002187 2-s2.0-85087208803 2 31 2002187 en Advanced Functional Materials © 2020 The Authors. All rights reserved. |
| spellingShingle | Science::Chemistry Crystal Facets First Principles Wang, Q. Shen, Lei Xue, Tong Cheng, Gao Huang, C. Z. Fan, Hong Jin Feng, Y. P. Single-crystalline TiO2(B) nanobelts with unusual large exposed {100} facets and enhanced Li-storage capacity |
| title | Single-crystalline TiO2(B) nanobelts with unusual large exposed {100} facets and enhanced Li-storage capacity |
| title_full | Single-crystalline TiO2(B) nanobelts with unusual large exposed {100} facets and enhanced Li-storage capacity |
| title_fullStr | Single-crystalline TiO2(B) nanobelts with unusual large exposed {100} facets and enhanced Li-storage capacity |
| title_full_unstemmed | Single-crystalline TiO2(B) nanobelts with unusual large exposed {100} facets and enhanced Li-storage capacity |
| title_short | Single-crystalline TiO2(B) nanobelts with unusual large exposed {100} facets and enhanced Li-storage capacity |
| title_sort | single crystalline tio2 b nanobelts with unusual large exposed 100 facets and enhanced li storage capacity |
| topic | Science::Chemistry Crystal Facets First Principles |
| url | https://hdl.handle.net/10356/154417 |
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