Zong, W;
Guo, H;
Ouyang, Y;
Mo, L;
Zhou, C;
Chao, G;
Hofkens, J;
... Liu, T; + view all
(2022)
Topochemistry-Driven Synthesis of Transition-Metal Selenides with Weakened Van Der Waals Force to Enable 3D-Printed Na-Ion Hybrid Capacitors.
Advanced Functional Materials
, 32
(13)
, Article 2110016. 10.1002/adfm.202110016.
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Abstract
Hybrid capacitors exhibit promise to bridge the gap between rechargeable high-energy density batteries and high-power density supercapacitors. This separation is due to sluggish ion/electron diffusion and inferior structural stability of battery-type materials. Here, a topochemistry-driven method for constructing expanded 2D rhenium selenide intercalated by nitrogen-doped carbon hybrid (E-ReSe2@INC) with a strong-coupled interface and weak van der Waals forces, is proposed. X-ray absorption spectroscopy analysis dynamically tracks the transformation from ReO into ReC bonds. The bridging bonds act as electron transport channels to enable improved conductivity and accelerated reaction kinetics. The expanded interlayer-spacing of ReSe2 layer by INC facilitates ion diffusion and ensures structural stability. As expected, the E-ReSe2@INC achieves an improved rate capability (252.5 mAh g−1 at 20 A g−1) and long-term cyclability (89.6% over 3500 cycles). Moreover, theoretical simulations reveal the favorable Na+ storage kinetics can be ascribed to its low bonding energy of −0.06 eV and diffusion barrier of 0.08 eV for sodium ions. Additionally, it is demonstrated that 3D printed sodium-ion hybrid capacitors deliver high energies/power densities of 81.4 Wh kg−1/0.32 mWh cm−2 and 9992.1 W kg−1/38.76 mW cm−2, as well as applicability in a wide temperature range.
| Type: | Article |
|---|---|
| Title: | Topochemistry-Driven Synthesis of Transition-Metal Selenides with Weakened Van Der Waals Force to Enable 3D-Printed Na-Ion Hybrid Capacitors |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/adfm.202110016 |
| Publisher version: | https://doi.org/10.1002/adfm.202110016 |
| 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. |
| Keywords: | 2D transition-metal selenides, 3D printing, hybrid capacitors, metal-polymer coordination, topochemistry |
| 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/10140543 |
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