富含Na6-PS5-Cl1+:一个有前途的固体电解质,用于全固态电池
Yi Zhang1, Haoran Zheng1, Jiale You1
1College of Chemistry and Chemical Engineering, Huanggang Normal University, Huanggang 438000, China.
Materials (Basel, Switzerland)
|May 11, 2024
概括
研究人员为全固态电池 (ASSB) 开发了富含的固态电解质. 这种新材料Na5.5PS4.5Cl1.5具有100倍以上的导电性,提高了ASSB的性能和稳定性.
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:
- 开发高性能固态电解质对于推进全固态电池 (ASSB) 的发展至关重要.
- 离子导体Argyrodite类型的导体是有希望的,但需要提高导电性.
- 在富含的系统中实现高离子导电性仍然是一个挑战.
研究的目的:
- 为了合成和表征新的富含的阿尔吉罗类型固体溶液.
- 研究丰富对离子导电性和电化学性能的影响.
- 在实验室规模的全固态电池中评估开发的电解质的性能.
主要方法:
- 固态合成Na6-xPS5-xCl1+x固体溶液,含有不同含量的 (0 ≤ x ≤ 0.5).
- 使用电化学阻抗光谱测量离子导电性.
- 通过循环电压测量进行电化学稳定性测试.
- 一个实验室规模的全固态电池的制造和测试.
主要成果:
- 成功开发出富含的Na6-xPS5-xCl1+x固体溶液,其形成范围为0 ≤ x ≤ 0.5.
- 在25°C时,Na5.5PS4.5Cl1.5 (x=0.5) 的最大离子导电率为1.2 × 10^-3 S/cm,比Na6PS5Cl.100倍以上.
- 丰富增强了离子导电性,电化学稳定性,并降低了激活能量,从而产生纯离子导体.
- 使用Na5.5PS4.5Cl1.5的实验室规模ASSB显示了稳定的电池性能.
结论:
- 开发了具有显著增强的离子导电性的新型丰富的类固态电解质.
- 通过丰富进行阳离子调制是一种有效的策略,可以提高导体的离子导电性.
- 开发的Na5.5PS4.5Cl1.5显示出作为实用的全固态电池的电解质的前景.
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