在碳纸上的in situ无机/有机保护层作为强大的Li金属阳极的先进电流收集器
Youpeng Li1, Haofan Duan2, Shuqin He2
1School of Energy and Automotive Engineering, Shunde Polytechnic, Foshan, 528300, China.
Small (Weinheim an der Bergstrasse, Germany)
|September 9, 2024
概括
研究人员为金属阳极开发了一层保护层,大大提高了电池的稳定性和周期寿命. 这一创新使得新一代应用的高能量密度和高速率金属电池成为可能.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- (Li) 金属阳极对于高能量密度电池至关重要.
- 无法控制的树生长和体积扩张限制 金属电池 (LMB) 应用.
研究的目的:
- 为金属阳极设计保护层,以提高稳定性和性能.
- 为了使高能量密度和高速率LMBs的实际应用.
主要方法:
- 一种无机/有机保护层 (BPH) 在3D碳纸 (CP) 上通过热合成.
- BPH层增强了固体电解质介相 (SEI) 的机械强度和离子导电性.
主要成果:
- 经过修改的3D CP (BPH-CP) 证明了稳定的涂/剥离,在400个循环中平均库伦比效率 (CE) 为99.7%.
- 在5°C的5000多个循环中实现了LiFePO4 (LFP) 细胞的化.
- 带有高质量负载LFP或LiNi0.8Co0.1Mn0.1O2 (NCM) 阴极的全电池显示出稳定的循环,具有高容量保留.
结论:
- 这种BPH保护层有效地减轻了金属阳极中的树突生长和体积膨胀问题.
- 该战略提供了一种简单而有效的方法,用于开发高能量密度和高速率的LMB.
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