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通过激光处理稳定Li7P3S11固态电解质的空气稳定.

Yannick Eatmon1, Joseph W Stiles2, Shuichiro Hayashi3

  • 1Department of Chemical and Biological Engineering, Princeton Univeristy, Princeton, NJ 08544, USA.

Nanomaterials (Basel, Switzerland)
|August 12, 2023
PubMed
概括

激光处理增强了硫酸固态电解质的稳定性和离子导电性,提高了它们适用于更安全,高性能全固态电池的适用性.

关键词:
能源设备 能源设备基于激光处理的处理.固态电解质 固态电解质

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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:

  • 与传统的液态电解质电池相比,全固态电池 (ASSB) 提供了更高的安全性和更高能量密度的潜力.
  • 固态电解质 (SSEs),特别是Li7P3S11,由于其高离子导电性而具有前景,但经过氧化和水解而遭受降解.
  • 提高SSE的稳定性对于ASSB的商业可行性至关重要.

研究的目的:

  • 研究一种基于激光的加工方法,以提高Li7P3S11 SSEs的湿度稳定性.
  • 确定激光参数对SSE表面形态和化学成分的影响.
  • 评估激光处理对SSE离子导电性和降解阻力的影响.

主要方法:

  • 对Li7P3S11样品进行了激光处理.
  • 分析了表面形态和化学成分.
  • 电化学阻抗光谱法用于测量离子导电性.
  • 进行了降解分析以评估稳定性.

主要成果:

  • 激光功率和扫描速度显著影响了表面形态和化学成分.
  • 经过激光处理的SSE在暴露于空气后的原始样本显示出比原始样本更高的离子导电率.
  • 确定了一个最佳的激光处理条件,将P2S74-降解降到最低.
  • 激光处理改善了SSE的整体湿度稳定性.

结论:

  • 基于激光的处理是提高Li7P3S11SSE的稳定性和性能的一种有效方法.
  • 这种技术为克服降解问题提供了一条途径,并增强ASSB固态电解质的商业潜力.
  • 优化的激光处理可以导致优异的离子导电性和降低在潮湿环境中的降解.