化学兴奋剂对晶体Si阳极的化过程的影响 - 一个第一原则研究
Han-Hsin Chiang1, Li-Yi Pan1, Chin-Lung Kuo1
1Department of Materials Science and Engineering, National Taiwan University, Taipei 10617, Taiwan.
The Journal of chemical physics
|August 22, 2024
概括
化学兴奋剂显著影响阳极性能. /兴奋剂通过软化键网络来增强化动力学,而兴奋剂不会提高性能.
科学领域:
- 材料科学 材料科学 材料科学
- 计算化学计算化学
- 电化学 电化学 电化学
背景情况:
- 阳极由于其高的理论容量,对下一代电池来说是有前途的.
- 了解化学兴奋剂对阳极性能的影响对于提高电池性能至关重要.
研究的目的:
- 研究化学兴奋剂 (,,) 对结晶 (c-Si) 阳极的化动力学和动态特性的影响.
- 阐明极行为中兴奋剂诱导的变化背后的机制.
主要方法:
- 第一原则计算.第一原则计算.
- 一开始的分子动力学模拟.
主要成果:
- /兴奋剂显著增强了化动力学,并促进了诱导的无形化.
- 兴奋剂不会改善化动力学,并且可以使矩阵更加硬和脆弱.
- 鉴定出c-Si键网络的兴奋剂诱导的机械软化是n型兴奋剂阳极中增强化的关键因素.
- 离子迁移能量障碍的变化是局部在剂原子附近.
结论:
- N型兴奋剂 (/) 是改善高性能电池阳极运动的可行策略.
- 由n型剂诱导的机械软化在增强化中起着至关重要的作用.
- 与/兴奋剂相比,兴奋剂在改善化动力学方面效果较差.
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