Extreme mixing in nanoporous high-entropy oxides for highly durable energy storage

IF 6.7 2区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Materials Today Chemistry Pub Date : 2024-07-30 DOI:10.1016/j.mtchem.2024.102229

Naixuan Ci, Kai Liu, Yixuan Hu, Kolan Madhav Reddy, Hua-Jun Qiu

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Abstract

The ability to mix many different metal cations in a single-phase nanoscale oxide is critical for property adjusting and new material discovery. However, synthesizing multicomponent high-entropy oxides (HEOs) consisting of over ten metal cations remains a challenge due to dissimilarity and immiscibility among these elements. Herein, we explore the accommodation ability of AlNi-type and AlTi-type intermetallic phases and find that the AlNi-type phase is powerful to accommodate many different kinds metal elements. By chemically dealloying the Al from the multicomponent AlNi-type intermetallic phase, multicomponent spinel oxides such as 7-component (AlNiCoRuMoCrFe)O, 8-component (AlNiCoRuMoCrFeTi)O, 13-component (AlNiCoCrFeCuMoVTaNbHfZrTi)O, 16-component (AlNiCoCrFeCuMoTaNbHfZrTiRuVPdY)O et al., with nanoporous structure and poor crystallity are obtained. As a case study, we find that when applied in Li-ion battery anode, our 16-component nanoporous HEO exhibits a high capacity of ∼1141.2 mAh g after 290 cycles at 0.1 A g and excellent cycling stability. This study greatly expands the composition space of nanoscale HEOs and provides an interesting route for new materials discovery.

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纳米多孔高熵氧化物中的极端混合，实现高度持久的能量存储

在单相纳米级氧化物中混合多种不同金属阳离子的能力对于调整性质和发现新材料至关重要。然而，由于这些元素之间的不相似性和不互溶性，合成由十多种金属阳离子组成的多组分高熵氧化物（HEOs）仍然是一项挑战。在此，我们探索了 AlNi- 型和 AlTi- 型金属间相的容纳能力，发现 AlNi- 型金属间相具有容纳多种金属元素的强大能力。通过化学脱合金的方法，从多组分 AlNi- 型金属间相中脱出 Al，产生了多组分尖晶石氧化物，如 7 组分（AlNiCoRuMoCrFe）O.、8 组分（AlNiCoRuMoCrFe）O.和 9 组分（AlNiCoRuMoCrFe）O.、8-组分（AlNiCoRuMoCrFeTi）O、13-组分（AlNiCoCrFeCuMoVTaNbHfZrTi）O、16-组分（AlNiCoCrFeCuMoTaNbHfZrTiRuVPdY）O 等多组分尖晶石氧化物。,获得了具有纳米多孔结构和较差结晶度的铝镍钴铬铁铜钴锰铜钽铌锆钛作为一项案例研究，我们发现当应用于锂离子电池阳极时，我们的 16 组分纳米多孔 HEO 在 0.1 A g 条件下循环 290 次后显示出 ∼1141.2 mAh g 的高容量和优异的循环稳定性。这项研究极大地拓展了纳米级 HEO 的组成空间，为新材料的发现提供了一条有趣的途径。

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来源期刊

Materials Today Chemistry Multiple-

CiteScore

8.90

自引率

6.80%

发文量

596

审稿时长

33 days

期刊介绍： Materials Today Chemistry is a multi-disciplinary journal dedicated to all facets of materials chemistry. This field represents one of the fastest-growing areas of science, involving the application of chemistry-based techniques to the study of materials. It encompasses materials synthesis and behavior, as well as the intricate relationships between material structure and properties at the atomic and molecular scale. Materials Today Chemistry serves as a high-impact platform for discussing research that propels the field forward through groundbreaking discoveries and innovative techniques.