在O3型离子电池中,多元件兴奋剂对无序相位过渡和多级相位过渡抑制效应的调节
Zongchang Li1, Wen Xi1, Zhuo Jiang1
1Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, 430074, China.
Small (Weinheim an der Bergstrasse, Germany)
|August 22, 2025
概括
用Ti,Fe和Al对O3型离子电池阴极进行三级注,可提高结构稳定性和循环性能. 这种方法与3D打印相结合,为开发高性能离子电池阴极提供了一个新的策略.
科学领域:
- 材料科学
- 电化学
- 能量储存
背景情况:
- O3型层状离子电池 (SIB) 阴极材料具有高容量,但由于相位转换和体积变化,其循环稳定性较差.
- 现有的正极材料需要在结构完整性和电化学性能方面进行改进,以便在实践中应用SIB.
研究的目的:
- 开发一种稳定且高性能的O3型离子电池阴极材料.
- 研究Ti,Fe和Al共对NaNi0.5Mn0.5O2的结构和电化学特性的影响.
- 探索3D打印在制造先进SIB阴极方面的潜力.
主要方法:
- 一种Ti,Fe和Al联合合的O3型NaNi0.5Mn0.5O2阴极材料 (NaNi0.40Mn0.40Ti0.13Fe0.06Al0.01O2,NaNMTFA) 的合成和表征.
- 电化学测试,包括静电循环,速率能力测试和长期循环性能评估.
- 制造和测试3D打印的NaNMTFA干细胞.
主要成果:
- NaNMTFA阴极在广泛的电压范围内表现出抑制的相位过渡和固体溶液反应,这归因于三元合增强的结构稳定性.
- 该材料在0.1C时产生了125.1mAhg-1的可逆容量,在1C时保持了103.4mAhg-1,在200个循环中保持了82.2%.
- 通过3D打印的全电池在100次循环后实现了118.7 mAh g-1和88.9%的容量保留,性能优于常规电极.
结论:
- 通过减轻晶格扭曲和加强层间相互作用,Ti,Fe和Al的配合有效地提高了O3型SIB阴极的结构稳定性和电化学性能.
- 3D打印为优化高性能O3型SIB阴极提供了一个有前途的制造技术,与传统方法相比,它能提供更高的性能.
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