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锡-碳双缓冲层,以抑制全固态电池中树状石的生长
Venkata Sai Avvaru1, Tofunmi Ogunfunmi2,3, Seonghun Jeong1
1Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.
ACS nano
|April 29, 2025
概括
研究人员开发了一种用于固态金属电池的双缓冲层. 该SUS/Sn/C层有效地抑制了树的生长,提高了电池的稳定性和周期寿命.
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:
- 全固态金属电池由于金属阳极提供高能量密度.
- 树突性金属生长会导致短路并限制电池周期寿命.
- 在电流收集器上均的沉积对于稳定的电池性能至关重要.
研究的目的:
- 调查由锡 (Sn) 和碳 (C) 组成的双缓冲层在不钢 (SUS) 电流采集器上的有效性.
- 为了比较两个缓冲层配置:SUS/Sn/C和SUS/C/Sn.
- 为了提高金属涂层的统一性,并提高固态金属电池的循环稳定性.
主要方法:
- 直接电流 (DC) 磁铁子喷雾涂层被用于在SUS电流采集器上沉积Sn和C层.
- 制造和测试了两个双缓冲层设计 (SUS/Sn/C和SUS/C/Sn).
- 电化学性能,包括Li/剥离循环,使用现场和现场特征技术进行了评估.
主要成果:
- 与SUS/C/Sn配置相比,SUS/Sn/C缓冲层在抑制树生长方面表现优越.
- 在没有短路的情况下,使用SUS/Sn/C缓冲层实现了超过450个周期的稳定化/剥离循环.
- 鉴定证实,Sn促进了均的Li沉积,而C则作为物理屏障,防止由于其电恐惧性质而导致的状物传播.
结论:
- 双层SUS/Sn/C缓冲层有效地减轻了固态金属电池中树状的形成.
- 这种缓冲层设计显著提高了自行车的稳定性和安全性,为实际应用铺平了道路.
- 的组合用于均涂层和C用于树突抑制,为先进的电池开发提供了一个有前途的战略.
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