Proceedings of MATSUS Spring 2024 Conference (MATSUS24)
DOI: https://doi.org/10.29363/nanoge.matsus.2024.114
Publication date: 18th December 2023
Two-dimensional (2D) superlattices are rising stars on the horizon of energy storage and conversion[1]. While preserving the distinctive characteristics of their 2D counterparts, they not only significantly enrich the family of 2D materials but also introduce novel functionalities such as adjustable interlayer spacing, entirely new physicochemical properties, and maximized heterojunction effects[2]. However, the intricate and low-yield synthesis procedures impede their large-scale production and application. In this context, we present a simple and high-yield solution-based approach for generating a series of 2D organic–inorganic hybrid superlattices. We demonstrate the substantial potential of these hybrid superlattices and their derivatives in the field of electrochemical energy storage, including applications in metal-sulfur batteries and metal-ion batteries.
Our synthesis primarily revolves around 2D selenide-based hybrid superlattices, exploring dozens of superlattice materials, including WSe2, MoSe2, VSe2-based superlattices. The synthesis route for these materials consistently exhibit remarkably high yields (exceeding 85%), enabling facile laboratory-scale production at the kilogram level. These superlattice materials exhibit physicochemical properties starkly distinct from those of the original selenide-based primitive units. For instance, the PVP-WSe2 superlattice allows for a continuously adjustable interlayer space ranging from 10.4 to 21 Å during annealing (compared to 6.5 Å for the original WSe2 crystal)[3]. This bears crucial significance for ion transport and volume changes during alkali metal ion charge-discharge processes. Simultaneously, the introduction of interlayer components is bound to alter the electronic structure in the bulk phase, causing not only changes in electron transport behavior but also exerting a significant tuning effect on catalytic active centers.
Overall, this work not only establishes a cost-effective strategy for producing new artificial superlattices but also pioneers their application in the field of electrochemical energy storage.
1. China Scholarship Council (201706650011).
2. Spanish Ministerio de Economíay Competitividad (ENE2016-77798-C4-3-R, and ENE2017-85087-C3).
3. National Natural Science Foundation of China (No. 52073061, 51872048).
4. Natural Science Foundation of Fujian Province (No. 2021J02020).
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