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使用导电液体电解质系统,具有高面积容量的可逆Na/脱落
Youngjae Jung1, Seyoung Lee1, Dowan Kim1
1School of Energy & Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan 44919, Republic of Korea.
ACS applied materials & interfaces
|September 6, 2023
概括
无阳极的金属电池通过使用一种新的导电电解质系统来实现高稳定性. 该系统增强了涂层和剥离,使海水电池能够有效地储存能量.
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:
- 无阳极金属电池 (AFSMBS) 提供高能量密度和安全性,但由于不稳定的固体电解质介相 (SEI) 形成和死亡,其循环稳定性不佳.
- 挑战包括树的生长和电解质分解在和剥离过程中,特别是在高面积容量.
研究的目的:
- 开发一种电导电解质系统,以提高无阳极金属电池的循环稳定性和库伦比效率.
- 在拟议的电解质系统中研究电子转移和死利用的机制.
主要方法:
- 提出了一种电导电解质系统,该系统结合了具有电子接收特性的液体电解质和具有低电子导电性NASICON固体电解质.
- 在用无限源的海水电池 (SWB) 中演示了系统的功能.
主要成果:
- 在没有阳极的SWB电池中,在高面积容量 (∼24 mAh/cm2) 的60多个周期中实现了高的库伦比克效率 (≥99.9%).
- 导电液体电解质抑制了不可逆转的电子转移和电解质分解,同时也使死的再利用成为可能.
结论:
- 拟议的导电电解质系统显著提高了无阳极系统中涂和剥离的可逆性.
- 这一战略为开发稳定和高性能金属电池提供了一个有前途的途径,特别是与固体电解质结合使用.
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