Issue 18, 2023

Metallic tin nanodots inducing an interfacial adsorption–insertion mechanism for carbon nano-honeycombs with enhanced sodium storage

Abstract

Herein, a new Na+ migration pathway of an interfacial adsorption–insertion mechanism is proposed for Sn nanodots modulating N-doped carbon nano-honeycombs (denoted as Sn/N-CNs) to enhance electrochemical kinetics. Benefitting from the unusual coordination ability of melamine with metallic Sn nanodots and the two-dimensional network formed by hydrogen bonding between melamine and cyanuric acid, the Sn/N-CNs were successfully prepared by a facial supramolecular assembly one-pot method and following carbonization treatment. Significantly, the introduction of metallic Sn nanodots and nitrogen-doping facilitate the nucleation and uniform growth of carbon nano-honeycombs and generate abundant N–Sn interface bonds, which can modulate the electronic structures of carbon atoms, promote the rapid adsorption/diffusion of Na+, accelerate the ionic/electronic kinetics and guarantee the improved specific capacity and cycling capability. As a result, the as-prepared Sn/N-CNs deliver a high specific capacity of 770.1 mA h g−1 at 0.1 A g−1, and an advanced ultra-long cycle lifespan of over 10 000 times with a specific capacity of 253.1 mA h g−1 at a large current density of 5 A g−1 (0.0086% loss per cycle).

Graphical abstract: Metallic tin nanodots inducing an interfacial adsorption–insertion mechanism for carbon nano-honeycombs with enhanced sodium storage

Supplementary files

Article information

Article type
Research Article
Submitted
09 Jul 2023
Accepted
17 Aug 2023
First published
17 Aug 2023

Inorg. Chem. Front., 2023,10, 5328-5336

Metallic tin nanodots inducing an interfacial adsorption–insertion mechanism for carbon nano-honeycombs with enhanced sodium storage

X. Ni, K. Li, X. Wang, X. Zhao, D. Li, H. Chen, Q. Wu, A. Ju and M. Zhu, Inorg. Chem. Front., 2023, 10, 5328 DOI: 10.1039/D3QI01288C

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