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-Fe-Cl家族作为全固态电池的新型固体电解质
Futing Sun1, Zesen Gao1, Yan Yang1
1State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Institute of Functional Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
ACS applied materials & interfaces
|October 3, 2024
概括
研究人员开发了一种新的化物固体电解质Li1.8Fe1.1Cl4,显著提高了固态电池的离子导电性. 这一进步为传统电解质提供了一个有希望的替代品.
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
- 固态化学 固态化学
背景情况:
- 化物固体电解质因其易于合成,电化学稳定性和离子导电性而受到关注.
- 然而,与氧化物和硫化物对应物相比,化物电解质的研究较少.
- -Fe-Cl相,特别是Li2FeCl4和Li6FeCl8,有可能成为新型固体电解质材料.
研究的目的:
- 为了研究Li-Fe-Cl相作为固体电解质的电化学特性.
- 通过材料修饰来增强Li2FeCl4的离子导电性.
- 为了评估基于Li-Fe-Cl的固体电解质在完全固态电池中的性能.
主要方法:
- -Fe-Cl相的合成和表征.
- 应用一种自我兴奋剂方法,在Li1.8Fe1.1Cl4中创造Li的空缺.
- 电化学测试,包括测量离子导电能力和循环稳定性,在一个LiLi1.8Fe1.1Cl4
- 组装和测试一个完全固态电池,使用Li1.8Fe1.1Cl4作为固体电解质.
主要成果:
- 在50°C时为Li1.8Fe1.1Cl4的最大离子导电率达到2.0×10−4S cm−1,比原始Li2FeCl4提升了3个数量级.
- 在50°C的Li-ion半电池中,在Li-ion1.8Fe1.1Cl4中经过2000小时的稳定循环,表明了良好的Li-ion兼容性.
- 成功组装了一个全固态电池,其初始特异性充电容量为76.36mAhg-1在0.1C和50°C,初始库伦比克效率为73.06%.
结论:
- 2FeCl4是一种有前途的新型化物固体电解质材料.
- 通过自我兴奋剂引入空缺是一种有效的策略,可以显著提高化物固体电解质的电化学性能.
- 开发的Li1.8Fe1.1Cl4显示出在固态电池中实际应用的潜力.
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