发现二维六边形MBene HfBO并探索其离子储存潜力
Nanxi Miao1, Yutong Gong1, Huaiyu Zhang1
1State Key Laboratory of Solidification Processing, School of Materials Science and Engineering Department, Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China.
Angewandte Chemie (International ed. in English)
|July 14, 2023
概括
研究人员发现了新的六角MAB阶段和2D六角MBenes (h-MBenes). 合成的HfBO显示出作为离子电池的阳极材料的前景,使新的储能应用成为可能.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 固态化学 固态化学
背景情况:
- 二维 (2D) 过渡金属化物 (MBenes) 是有前途的材料,由于合成挑战,其应用受到阻碍.
- 传统的正方形MAB (ort-MAB) 阶段很难在MBenes生产中进行选择性蚀刻.
研究的目的:
- 发现新的三元六角MAB (h-MAB) 阶段和二维六角MBenes (h-MBenes).
- 调查h-MAB阶段作为MBenes的前体的适用性.
- 为了合成和描述一种用于储能应用的新型h-MBene.
主要方法:
- 使用ab initio预测 (计算建模) 来识别潜在的h-MAB阶段.
- 实验合成涉及h-MAB前体的选择性蚀刻.
- 对合成的2D材料进行了表征.
- 对离子电池阳极性能进行了电化学测试.
主要成果:
- 发现了一个三元六角MAB (h-MAB) 阶段的家族.
- 鉴定出 h-MAB 阶段比 ort-MAB 阶段更合适的前体.
- 通过从Hf2InB2.2.中去除来实现2D六角MBenes HfBO的实验合成.
- 合成的2D HfBO证明了作为离子电池阳极的特定容量为420 mAh/g.
结论:
- 发现h-MAB阶段为MBenes合成开辟了新的途径.
- 2D HfBO是离子电池的一个有前途的阳极材料.
- 这项工作扩大了二维材料的家族及其在储能方面的潜在应用.
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