双接口修改,使先进的离子电池具有长寿命和空气稳定的O3型阴极
Mingzhe Wu1,2, Ruiling Xu1,2, Kunfang Wang1,2,3
1Advanced Battery Technology Center, Harbin Institute of Technology at Weihai, Weihai 264209, China.
ACS applied materials & interfaces
|December 21, 2025
概括
这项研究通过使用双层接口修改改改进了用于离子电池 (SIB) 的O3型分层氧化物阴极. 优化的材料显示出更好的容量,速度能力和稳定性,可以抵御骑自行车和暴露在空气中.
科学领域:
- 材料科学与工程 材料科学与工程
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 由于其高能量密度,O3型层氧化物是离子电池 (SIB) 的有希望的阴极材料.
- 这些阴极的实际应用受不良的循环和空气稳定性所限制.
研究的目的:
- 开发O3型阴极材料的双层接口修改策略.
- 提高SIBs O3阴极的电化学特性,循环稳定性和空气稳定性.
主要方法:
- 对O3阴极 (NaNi0.45Mn0.4Cu0.05Ti0.1O2) 应用了一种双层接口修改策略.
- 修改后的阴极 (O3@P2@NAO) 使用物理化学和电化学测试进行了表征.
主要成果:
- O3@P2@NAO阴极在0.1C时显示出高容量150 mAh g-1和优越的速率能力 (5C时126.6 mAh g-1).
- 它表现出延长的循环稳定性,在120个循环后保持90.5%的容量.
- 观察到很好的空气稳定性,在湿气下7天后保持85.5%的容量.
结论:
- 双层接口修改有效降低Na+扩散屏障,并减轻结构恶化.
- 修改后的阴极提供了快速的Na+运输和保护电解质和空气腐蚀.
- 这种方法为开发实用的O3型阴极和推进SIB商业化提供了可行的途径.
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