Zubair Maria, Ahad Syed Abdul, Amiinu Ibrahim Saana, Lebedev Vasily A, Mishra Mohini, Geaney Hugh, Singh Shalini, Ryan Kevin M
Department of Chemical Sciences and Bernal Institute, University of Limerick, Limerick, Ireland.
Nanoscale Horiz. 2023 Aug 21;8(9):1262-1272. doi: 10.1039/d3nh00097d.
Solution-based synthesis of mixed ionic and electronic conductors (MIECs) has enabled the development of novel inorganic materials with implications for a wide range of energy storage applications. However, many technologically relevant MIECs contain toxic elements (Pb) or are prepared by using traditional high-temperature solid-state synthesis. Here, we provide a simple, low-temperature and size-tunable (50-90 nm) colloidal hot injection approach for the synthesis of NaSbS based MIECs using widely available and non-toxic precursors. Key synthetic parameters (cationic precursor, reaction temperature, and ligand) are examined to regulate the shape and size of the NaSbS nanocrystals (NCs). FTIR studies revealed that ligands with carboxylate functionality are coordinated to the surface of the synthesized NaSbS NCs. The synthesized NaSbS nanocrystals have electronic and ionic conductivities of 3.31 × 10 (e) and 1.9 × 10 (Na) S cm respectively, which are competitive with the ionic and electrical conductivities of perovskite materials generated by solid-state reactions. This research gives a mechanistic understanding and post-synthetic evaluation of parameters influencing the formation of sodium antimony chalcogenides materials.
基于溶液的混合离子电子导体（MIECs）合成方法推动了新型无机材料的开发，这些材料在广泛的能量存储应用中具有重要意义。然而，许多与技术相关的MIECs含有有毒元素（Pb），或者是通过传统的高温固态合成方法制备的。在此，我们提供了一种简单、低温且尺寸可调（50 - 90纳米）的胶体热注入方法，用于使用广泛可得且无毒的前驱体合成基于NaSbS的MIECs。我们研究了关键合成参数（阳离子前驱体、反应温度和配体）以调控NaSbS纳米晶体（NCs）的形状和尺寸。傅里叶变换红外光谱（FTIR）研究表明，具有羧酸盐官能团的配体与合成的NaSbS NCs表面配位。合成的NaSbS纳米晶体的电子电导率和离子电导率分别为3.31×10（e）和1.9×10（Na）S cm，与通过固态反应生成的钙钛矿材料的离子电导率和电导率具有竞争力。这项研究对影响硫属钠锑化物材料形成的参数提供了机理理解和合成后评估。
