诱导"强大的d-d轨道相互作用"的Se-p轨道使Se-丰富的ZnSe/MnSe@C电极具有很高的可逆性,作为离子储存的优秀宿主
Sikandar Iqbal1,2, Aadil Nabi Chishti1,2, Muhammad Ali1,2
1ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou, 310027, China.
Small (Weinheim an der Bergstrasse, Germany)
|February 5, 2024
概括
在ZnSe/MnSe@C异构中的富含Se的粒子通过提高可逆性和导电性来增强离子储存. 这种优化的电极材料在储能应用中表现出良好的容量和循环稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 纳米技术 纳米技术
背景情况:
- 过渡金属化物异构结构显示出离子储存的前景.
- 糟糕的自行车性能和可逆性仍然是重大挑战.
研究的目的:
- 为了研究富含Se的粒子在ZnSe/MnSe@C异构中的作用,以改善离子储存.
- 了解化学相互作用和电子特性,从而提高性能.
主要方法:
- 合成富含的 ZnSe/MnSe@C 异构结构.
- 理论计算以了解能源障碍和电子相互作用.
- 电化学测试 (循环性能,容量测量).
- 在现场和现场表征技术.
主要成果:
- 富含的颗粒促进有效的离子插入/提取,从而导致高可逆性.
- 富含Se的粒子降低了化能障碍 (1.32 eV与1.50 eV相比) 并提高了导电性.
- 强大的d-d轨道相互作用ZnSe和MnSe之间创建一个稳定的电子桥梁,以有效地传输电荷.
- 优化的电极在0.1 A g-1 (100个周期) 时实现了576 mAh g-1和在1 A g-1 (2500个周期) 时实现了384 mAh g-1.
结论:
- 富含Se的粒子对于提高离子储存的ZnSe/MnSe@C异构结构的可逆性和循环稳定性至关重要.
- 该研究阐明了基本机制,包括化学相互作用和电子特性,负责提高性能.
- 这些发现为设计用于高性能储能器件的先进电极材料提供了有希望的策略.
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