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Topochemistry-Driven Synthesis of Transition-Metal Selenides with Weakened Van Der Waals Force to Enable 3D-Printed Na-Ion Hybrid Capacitors

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. Green open access

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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 ReO into ReC 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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