Surface modification of Na₂Ti₃O₇ nanofibre arrays using N-doped graphene quantum dots as advanced anodes for sodium-ion batteries with ultra-stable and high-rate capability
Both nanoscale surface modification and structural control play significant roles in enhancing the electrochemical properties of battery electrodes. Herein, we design a novel binder-free anode via N-doped graphene quantum dot (N-GQD) decorated Na₂Ti₃O₇ nanofibre arrays (Na₂Ti₃O₇ NFAs) directly grown...
| 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/10356/151628 |
| _version_ | 1826113449949659136 |
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| author | Kong, Dezhi Wang, Ye Huang, Shaozhuan Lim, Yew Von Zhang, Jun Sun, Linfeng Liu, Bo Chen, Tupei Valdivia y Alvarado, Pablo Yang, Hui Ying |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Kong, Dezhi Wang, Ye Huang, Shaozhuan Lim, Yew Von Zhang, Jun Sun, Linfeng Liu, Bo Chen, Tupei Valdivia y Alvarado, Pablo Yang, Hui Ying |
| author_sort | Kong, Dezhi |
| collection | NTU |
| description | Both nanoscale surface modification and structural control play significant roles in enhancing the electrochemical properties of battery electrodes. Herein, we design a novel binder-free anode via N-doped graphene quantum dot (N-GQD) decorated Na₂Ti₃O₇ nanofibre arrays (Na₂Ti₃O₇ NFAs) directly grown on flexible carbon textiles (CTs) for high-performance sodium-ion batteries (SIBs). Three dimensional (3D) hierarchical Na₂Ti₃O₇ NFAs constructed from ultrathin Na₂Ti₃O₇ nanosheets provide a large specific surface area and shorter diffusion paths for both ions and electrons. More importantly, the unique N-GQD soft protection produces greatly increased surface conductivity and imparts stability to the nanofibre array structure, leading to fast Na-ion diffusion kinetics. As a result, the flexible 3D hierarchical Na₂Ti₃O₇@N-GQDs/CT electrode as a binder-free anode for a sodium half-battery delivers a high specific capacity of 158 mA h g⁻¹ after 30 cycles and retains ∼92.5% of this capacity after 1000 cycles at a high rate of 4C (1C = 177 mA g⁻¹). Furthermore, it can be assembled into a flexible full cell with Na₃V₂(PO₄)₃@NC/CTs as the cathode, which exhibits high levels of flexibility, excellent long-term cycling stability, and outstanding energy/power density. Our results open up a new approach for the surface modification strategy to enhance the performance of battery electrodes. |
| first_indexed | 2024-10-01T03:23:25Z |
| format | Journal Article |
| id | ntu-10356/151628 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:23:25Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1516282021-07-22T11:08:27Z Surface modification of Na₂Ti₃O₇ nanofibre arrays using N-doped graphene quantum dots as advanced anodes for sodium-ion batteries with ultra-stable and high-rate capability Kong, Dezhi Wang, Ye Huang, Shaozhuan Lim, Yew Von Zhang, Jun Sun, Linfeng Liu, Bo Chen, Tupei Valdivia y Alvarado, Pablo Yang, Hui Ying School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering High-performance Anode Titanate Nanotube Both nanoscale surface modification and structural control play significant roles in enhancing the electrochemical properties of battery electrodes. Herein, we design a novel binder-free anode via N-doped graphene quantum dot (N-GQD) decorated Na₂Ti₃O₇ nanofibre arrays (Na₂Ti₃O₇ NFAs) directly grown on flexible carbon textiles (CTs) for high-performance sodium-ion batteries (SIBs). Three dimensional (3D) hierarchical Na₂Ti₃O₇ NFAs constructed from ultrathin Na₂Ti₃O₇ nanosheets provide a large specific surface area and shorter diffusion paths for both ions and electrons. More importantly, the unique N-GQD soft protection produces greatly increased surface conductivity and imparts stability to the nanofibre array structure, leading to fast Na-ion diffusion kinetics. As a result, the flexible 3D hierarchical Na₂Ti₃O₇@N-GQDs/CT electrode as a binder-free anode for a sodium half-battery delivers a high specific capacity of 158 mA h g⁻¹ after 30 cycles and retains ∼92.5% of this capacity after 1000 cycles at a high rate of 4C (1C = 177 mA g⁻¹). Furthermore, it can be assembled into a flexible full cell with Na₃V₂(PO₄)₃@NC/CTs as the cathode, which exhibits high levels of flexibility, excellent long-term cycling stability, and outstanding energy/power density. Our results open up a new approach for the surface modification strategy to enhance the performance of battery electrodes. This work is supported by the SUTD Digital Manufacturing and Design (DManD) Centre and International Design Centre (IDC). 2021-07-22T11:08:27Z 2021-07-22T11:08:27Z 2019 Journal Article Kong, D., Wang, Y., Huang, S., Lim, Y. V., Zhang, J., Sun, L., Liu, B., Chen, T., Valdivia y Alvarado, P. & Yang, H. Y. (2019). Surface modification of Na₂Ti₃O₇ nanofibre arrays using N-doped graphene quantum dots as advanced anodes for sodium-ion batteries with ultra-stable and high-rate capability. Journal of Materials Chemistry A, 7(20), 12751-12762. https://dx.doi.org/10.1039/C9TA01641D 2050-7488 https://hdl.handle.net/10356/151628 10.1039/C9TA01641D 20 7 12751 12762 en Journal of Materials Chemistry A © 2019 The Royal Society of Chemistry. All rights reserved. |
| spellingShingle | Engineering::Electrical and electronic engineering High-performance Anode Titanate Nanotube Kong, Dezhi Wang, Ye Huang, Shaozhuan Lim, Yew Von Zhang, Jun Sun, Linfeng Liu, Bo Chen, Tupei Valdivia y Alvarado, Pablo Yang, Hui Ying Surface modification of Na₂Ti₃O₇ nanofibre arrays using N-doped graphene quantum dots as advanced anodes for sodium-ion batteries with ultra-stable and high-rate capability |
| title | Surface modification of Na₂Ti₃O₇ nanofibre arrays using N-doped graphene quantum dots as advanced anodes for sodium-ion batteries with ultra-stable and high-rate capability |
| title_full | Surface modification of Na₂Ti₃O₇ nanofibre arrays using N-doped graphene quantum dots as advanced anodes for sodium-ion batteries with ultra-stable and high-rate capability |
| title_fullStr | Surface modification of Na₂Ti₃O₇ nanofibre arrays using N-doped graphene quantum dots as advanced anodes for sodium-ion batteries with ultra-stable and high-rate capability |
| title_full_unstemmed | Surface modification of Na₂Ti₃O₇ nanofibre arrays using N-doped graphene quantum dots as advanced anodes for sodium-ion batteries with ultra-stable and high-rate capability |
| title_short | Surface modification of Na₂Ti₃O₇ nanofibre arrays using N-doped graphene quantum dots as advanced anodes for sodium-ion batteries with ultra-stable and high-rate capability |
| title_sort | surface modification of na₂ti₃o₇ nanofibre arrays using n doped graphene quantum dots as advanced anodes for sodium ion batteries with ultra stable and high rate capability |
| topic | Engineering::Electrical and electronic engineering High-performance Anode Titanate Nanotube |
| url | https://hdl.handle.net/10356/151628 |
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