Xu, Y;
Zhang, C;
Zhou, M;
Fu, Q;
Zhao, C;
Wu, M;
Lei, Y;
(2018)
Highly nitrogen doped carbon nanofibers with superior rate capability and cyclability for potassium ion batteries.
Nature Communications
, 9
, Article 1720. 10.1038/s41467-018-04190-z.
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Abstract
Potassium-ion batteries are a promising alternative to lithium-ion batteries. However, it is challenging to achieve fast charging/discharging and long cycle life with the current electrode materials because of the sluggish potassiation kinetics. Here we report a soft carbon anode, namely highly nitrogen-doped carbon nanofibers, with superior rate capability and cyclability. The anode delivers reversible capacities of 248 mAh g–1 at 25 mA g–1 and 101 mAh g–1 at 20 A g–1 , and retains 146 mAh g–1 at 2 A g–1 after 4000 cycles. Surface-dominated K-storage is verified by quantitative kinetics analysis and theoretical investigation. A full cell coupling the anode and Prussian blue cathode delivers a reversible capacity of 195 mAh g–1 at 0.2 A g–1 . Considering the cost-effectiveness and material sustainability, our work may shed some light on searching for K-storage materials with high performance.
| Type: | Article |
|---|---|
| Title: | Highly nitrogen doped carbon nanofibers with superior rate capability and cyclability for potassium ion batteries |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1038/s41467-018-04190-z |
| Publisher version: | http://doi.org/10.1038/s41467-018-04190-z |
| Language: | English |
| Additional information: | Copyright © The Author(s) 2018. Open Access, This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/ licenses/by/4.0/. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10071621 |
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