化的硫-离子调制电子配置用于高性能离子存储
Ming Zhong1, Yang Liu1, Jiahui Cao1
1State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|January 8, 2026
概括
硫兴奋剂增强了用于离子电池的化 (MnSe) 阳极. 这种缺陷工程改善了反应动力学和循环稳定性,从而提高了储能性能.
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:
- 化 (MnSe) 是离子电池的一个有前途的阳极材料,因为它具有很高的容量和低成本.
- 然而,MnSe的循环稳定性较差,反应动力学较慢,这限制了其实际应用.
- 通过阴离子兴奋剂的缺陷工程提供了一个可行的策略来克服这些局限性.
研究的目的:
- 通过引入硫 (S) 兴奋剂来提高MnSe的储存性能.
- 调查硫注射对MnSe电子结构和离子扩散通路的影响.
- 评估硫合MnSe阳极的电化学性能,包括速度能力和循环稳定性.
主要方法:
- 使用硫化处理丰富的金属有机框架衍生的MnSe.使用硫化处理合成含硫的MnSe.
- 使用各种技术进行全面的表征 (例如,X射线衍射,X射线光电子谱学).
- 理论计算以了解硫注射对电子配置和离子扩散的影响.
- 电化学测试以评估储存性能,包括速率测试和长期循环.
主要成果:
- 硫注射成功地将缺陷水平引入了MnSe网格.
- 优化离子扩散通路和减少Na+扩散障碍被观察到硫合的MnSe.
- 最佳的硫合MnSe阳极表现出极好的速率性能,在800个循环后在5.0 A g-1下保持353.1 mAh g-1.
- 在300个循环后,在2.0 A g-1 时实现了402.7 mAh g-1 的特定容量.
结论:
- 硫是提高离子电池MnSe阳极电化学性能的一个有效策略.
- 性能改善归因于缺陷工程,该工程优化了离子扩散和电子性能.
- 用硫添加的MnSe材料显示出对高性能离子储能应用的巨大潜力.
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