多离子协同作用增强了高性能全固态电池.
Chao Li1, Wenshuo Zhang1, Xiaomeng Shi1
1Tianjin Key Lab for Rare Earth Materials and Applications, Center for Rare Earth and Inorganic Functional Materials, Smart Sensing Interdisciplinary Science Center, School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin 300350, P. R. China.
ACS nano
|December 22, 2025
概括
新的化物固体电解质 (SE) 与混合离子改善了下一代全固态电池 (ASSLB) 的离子导电性和电极兼容性. 这些先进的SE可实现稳定,高速率的储能.
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:
- 全固态电池 (ASSLBs) 对下一代能源存储充满希望.
- 先进的固体电解质 (SE) 对ASSLB的性能至关重要.
- 提高SE的离子导电性和电极兼容性仍然是一个挑战.
研究的目的:
- 开发新的固体电解质 (SE) 来提高全固态电池 (ASSLB) 的性能.
- 研究混合化离子对离子导电性和接口性质的影响.
- 评估ASSLBs的电化学性能,使用开发的SEs.
主要方法:
- 合成Li3YCl6-2xBrxIx固体电解质,具有不同的化物组成 (0 ≤ x ≤ 1).
- 离子导电性,激活能量和结构性质的表征.
- 对Li4Ti5O12 (LTO) 阴极和Li-In合金阳极的界面兼容性的评估.
- 制造和电化学测试ASSLBs,包括速度能力和循环稳定性.
主要成果:
- 在Li3中实现了高离子导电性 (1.98 mS cm-1) 和低激活能 (0.257 eV) 在BrSEs中.
- 证明与LTO阴极和Li-In合金阳极的良好兼容性.
- 观察到LiI自我限制的被动化接口层的现场形成,增强Li接口的稳定性.
- ASSLBs表现出高速率能力 (高达10C),优异的可逆性和稳定的循环 (>2000个循环在1C,在1000个循环在2C后93.7%的保留).
结论:
- 混合离子化物固体电解质提供了一种途径,可以同时提高ASSLB中的离子导电性和界面稳定性.
- 开发的Li3YCl6-2xBrxSE显示出高性能ASSLB应用的巨大潜力.
- 基于混合离子的SE设计是一种提高化物SE性能的经济有效策略.
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