Transport properties of mechanochemically synthesized copper (I) selenide for potential applications in energy conversion and storage

IF 4.703 3区材料科学

Nanoscale Research Letters Pub Date : 2024-04-30 DOI:10.1186/s11671-024-04025-5

Marcela Achimovičová, Katarína Gáborová, Jiří Navrátil, Petr Levinský, Olha Skurikhina, Juraj Kurimský, Jaroslav Briančin, Tomáš Plecháček, Dáša Drenčaková

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Abstract

This work studied the thermal stability, electrical, and thermoelectrical properties of copper(I) selenide, Cu₂Se synthesized by high-energy milling in a planetary ball mill. The phase composition was investigated by X-ray powder diffraction analysis and scanning electron microscopy. The conversion of the precursors during mechanochemical synthesis and the stability of the product was monitored by thermal analysis. The dependence of electrical properties on the product porosity was observed. For the densification of Cu₂Se, the method of spark plasma sintering was applied to prepare suitable samples for thermoelectric characterization. High-temperature thermoelectric properties of synthetic Cu₂Se were compared to its natural analogue-mineral berzelianite in terms of its potential application in energy conversion. Based on the results a relatively high figure-of-merit, ZT parameter (~ 1.15, T = 770 K) was obtained for undoped Cu₂Se, prepared by rapid mechanochemical reaction (5 min). Cyclic voltammetry measurements of Na/NaClO₄/Cu₂Se cell implied that mechanochemically synthesized Cu₂Se could be used as a promising intercalation electrode for sodium-ion batteries.

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机械化学合成硒化铜 (I) 的传输特性在能量转换和储存中的潜在应用

这项工作研究了在行星球磨机中通过高能研磨合成的硒化铜（Cu2Se）的热稳定性、电学和热电学特性。相组成通过 X 射线粉末衍射分析和扫描电子显微镜进行了研究。通过热分析监测了机械化学合成过程中前驱体的转化和产物的稳定性。此外，还观察了电性能与产品孔隙率的关系。在 Cu2Se 的致密化过程中，采用了火花等离子烧结法制备适合热电特性分析的样品。将合成 Cu2Se 的高温热电性能与其天然类似物--矿物贝氏锰矿进行了比较，以确定其在能源转换中的潜在应用。根据研究结果，通过快速机械化学反应（5 分钟）制备的未掺杂 Cu2Se 获得了相对较高的优点系数 ZT 参数（~ 1.15，T = 770 K）。Na/NaClO4/Cu2Se 电池的循环伏安测量结果表明，机械化学合成的 Cu2Se 可用作钠离子电池的插层电极。

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来源期刊

Nanoscale Research Letters NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

15.00

自引率

0.00%

发文量

110

审稿时长

2.5 months

期刊介绍： Nanoscale Research Letters (NRL) provides an interdisciplinary forum for communication of scientific and technological advances in the creation and use of objects at the nanometer scale. NRL is the first nanotechnology journal from a major publisher to be published with Open Access.