坚固的LiNi0.6Mn0.4O2阴极通过微结构应力消散和晶体相离子传输改进的双重功能策略来实现
Yuanyuan Li1, Song Chen1, Qiusheng Zhang1
1State Key Laboratory of Chemo and Biosensing, College of Chemistry and Chemical Engineering, Hunan University, Hunan Key Laboratory of Two-Dimensional Materials, Changsha 410082, P. R. China.
ACS nano
|January 14, 2026
概括
无的,,氧化 (NM64) 阴极通过氧化化提高了稳定性和性能. 这一进步为可持续的离子电池提供了具有成本效益和高性能的解决方案.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 没有的LiNi0.6Mn0.4O2 (NM64) 是一个有希望的,低成本的替代品NCM622为离子电池.
- 结构不稳定性和缓慢的动力学阻碍了NM64的商业可行性.
研究的目的:
- 提高NM64.4的结构稳定性和电化学性能.
- 为离子电池开发具有成本效益和可持续性的阴极材料.
主要方法:
- 氧气化NM64以产生氧气化的NM64 (O-NM64).
- 对O-NM64的结构完整性和离子传输的表征.
- 在离子电池中对O-NM64进行电化学测试,包括速率能力和长期循环.
- 测试一个20公斤尺度的囊细胞.
主要成果:
- O-NM64显示减少了阴离子混合和延长的初级粒,增强了强度.
- 在0.2°C达到201.6mAhg-1的特定容量,在10°C达到153.40mAhg-1的特定容量.
- 在0.2°C的450个循环后,表现出81.38%的容量保留,并在大型囊细胞中表现稳定.
结论:
- 氧气化是一种有效的策略,可以改善NM64的稳定性和动力学.
- O-NM64提供了高能,高功率和长周期寿命的阴极材料.
- 这种方法提供了对可持续,经济高效的电池技术的洞察力.
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