固态电池的界面化学:界面的形成及其后果
Shaofei Wang1, Henghui Xu1, Wangda Li1
1Materials Science and Engineering Program & Texas Materials Institute, The University of Texas at Austin , Austin, Texas 78712, United States.
Journal of the American Chemical Society
|December 19, 2017
概括
固态电池面临着状物生长的挑战. 这项研究揭示了稳定的固体电解质可以加速树突形成,与预期相反,并提出了强大的电池开发的相间设计.
科学领域:
- 材料科学
- 电化学
- 电池技术
背景情况:
- 固体电解质为电池中的树生长和电解质消耗提供了解决方案.
- 固体电解质/电极接口具有高电阻和复杂的形态,阻碍了固态电池的开发.
研究的目的:
- 通过先进的化学分析,研究固体电解质/电极接口的动态相间形成.
- 了解互相对固态电池的树生长和电化学性能的影响.
主要方法:
- 超敏感的三维 (3D) 化学分析以研究相间动力学.
- 热力学分析以评估相间特性及其对树突形成的影响.
主要成果:
- 与普遍认为的相反,具有金属阳极的高度稳定的固体电解质由于减少了的消耗和增加了电驱动力,促进了更快的树形成.
- 电子和离子导电性显著影响电化学性能和树突的生长.
结论:
- 防止树突生长的理想间相需要低电子导电性,高离子导电性,化学稳定性,动态厚度和均覆盖.
- 这项研究提供了一个设计界面的框架,以克服固态电池中的石挑战.
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