Xu, Y;
Bahmani, F;
Zhou, M;
Li, Y;
Zhang, C;
Liang, F;
Kazemi, SH;
... Lei, Y; + view all
(2019)
Enhancing potassium-ion battery performance by defect and interlayer engineering.
Nanoscale Horizons
, 4
(1)
pp. 202-207.
10.1039/c8nh00305j.
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Abstract
Defect and interlayer engineering is applied to exploit the large van der Waals gaps of transition metal dichalcogenides for potassium-ion batteries (KIBs). As a demonstrator, MoS2 nanoflowers with expanded interlayer spacing and defects in the basal planes are used as KIB anodes in the voltage range of 0.5–2.5 V, where an intercalation reaction rather than a conversion reaction takes place to store K-ions in the van der Waals gaps. The nanoflowers show enhanced K-storage performance compared to the defect-free counterpart that has a pristine interlayer spacing. Kinetic analysis verifies that the K-ion diffusion coefficient and surface charge storage are both enhanced in the applied voltage range of the intercalation reaction. The collective effects of expanded interlayer spacing and additionally exposed edges induced by the in-plane defects enable facile K-ion intercalation, rapid K-ion transport and promoted surface K-ion adsorption simultaneously.
| Type: | Article |
|---|---|
| Title: | Enhancing potassium-ion battery performance by defect and interlayer engineering |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1039/c8nh00305j |
| Publisher version: | https://doi.org/10.1039/c8nh00305j |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| 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.ucl.ac.uk/id/eprint/10076118 |
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