Issue 16, 2022

Key to intimately coupling metal chalcogenides with a carbon nanonetwork for potassium-ion storage

Abstract

Intimately coupling metal chalcogenides (MCs) with carbon materials is critical for boosting their application performances. However, since MCs and carbon materials are usually two types of incompatible materials, a non-uniform carbon/MC interface is easily formed, especially for multidimensional nanostructures. Herein, we propose an interfacial engineering strategy to enhance the interaction between a three-dimensional nanonetwork-structured carbon aerogel (CA) and MCs. The key to this strategy is the introduction of substantial oxygen-containing functional groups into the CA, which greatly improves its compatibility with MC precursors, and thus enables MCs to grow on the CA framework homogeneously. The optimized CA/MC interface enables extremely compact bonding interaction between the CA and MC nanosheets. Benefitting from a well-organized structure, the synthesized CA@MC composites show remarkable potassium-ion storage performances and electrochemical kinetic properties. As a demonstration, the CA@MoS2 composites show high reversible capacity (389 mA h g−1 at 100 mA g−1), excellent rate performance (capacity retention exceeds 40% with a 5-fold increase of the current density) and an enhanced ion diffusion rate when used as an anode material for potassium-ion batteries.

Graphical abstract: Key to intimately coupling metal chalcogenides with a carbon nanonetwork for potassium-ion storage

Supplementary files

Article information

Article type
Paper
Submitted
12 Jan 2022
Accepted
09 Mar 2022
First published
09 Mar 2022

J. Mater. Chem. A, 2022,10, 8958-8965

Key to intimately coupling metal chalcogenides with a carbon nanonetwork for potassium-ion storage

W. Zhang, Z. Xie, C. Lan, Y. Yang, M. Zheng, H. Hu, Y. Xiao, Y. Liu and Y. Liang, J. Mater. Chem. A, 2022, 10, 8958 DOI: 10.1039/D2TA00269H

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