Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/90026
| Title: | Revealing the sodium-storage performance enhancement of adsorption-type carbon materials after ammonia treatment : active nitrogen dopants or specific surface area? | Authors: | Li, G Yu, Y Huang, B Chen, P Shao, Z An, L |
Issue Date: | Apr-2021 | Source: | International journal of energy research, Apr. 2021, v. 45, no. 5, p. 7447-7456 | Abstract: | Adsorption-type carbon materials are promising candidates for fast sodium-ion storage via surface physisorption or chemisorption of sodium ions. Post-treatment of carbon such as ammonia can simultaneously strengthen both adsorption effects by increasing the specific surface area for physisorption, and by introducing active nitrogen dopants for chemisorption. Which factor, however, the increment of specific surface area or the introduction of active nitrogen dopants, predominantly contributes to sodium-storage capacity increment, remains a question. Answering this question is of great importance for understanding the sodium storage mechanism of adsorption-type carbon materials and thereby optimizing their sodium storage capabilities. In this work, pristine carbon is thermally treated in ammonia at temperatures from 600 to 1200°C, resulting in a simultaneous increase of specific surface area (8.6-1155 m2 g−1) and active nitrogen dopants (0.75-6.47 wt%). Correlations between sodium storage capacity and specific surface area/active nitrogen dopants are established. It is found that as the post-treatment temperature increases, the capacity increment is contributed first by sodium physisorption on active surface, and then by sodium chemisorption on nitrogen dopants. Our findings enrich the mechanistic understanding of sodium storage in adsorption-type carbon materials, which may guide the rational designs of carbon materials for high-rate sodium-based energy storage systems. | Keywords: | Active nitrogen dopants Adsorption-type carbon materials Chemisorption Physisorption Sodium storage Specific surface area |
Publisher: | John Wiley & Sons | Journal: | International journal of energy research | ISSN: | 0363-907X | DOI: | 10.1002/er.6327 | Rights: | © 2020 John Wiley & Sons Ltd This is the peer reviewed version of the following article: Li, G, Yu, Y, Huang, B, Chen, P, Shao, Z, An, L. Revealing the sodium-storage performance enhancement of adsorption-type carbon materials after ammonia treatment: Active nitrogen dopants or specific surface area? Int J Energy Res. 2021; 45: 7447– 7456, which has been published in final form at https://doi.org/10.1002/er.6327. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. |
| Appears in Collections: | Journal/Magazine Article |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Li_Sodium-Storage_Adsorption-Type_Carbon.pdf | Pre-Published version | 3.3 MB | Adobe PDF | View/Open |
Access
View full-text via PolyU eLinks 
Page views
46
Last Week
0
0
Last month
Citations as of Oct 1, 2023
Downloads
2
Citations as of Oct 1, 2023
SCOPUSTM
Citations
3
Citations as of Sep 28, 2023
WEB OF SCIENCETM
Citations
2
Citations as of Sep 28, 2023
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.