二甲的结构和动态性质 二甲-二甲-一甲-二甲:KCB11H12
Mirjana Dimitrievska1,2, Hui Wu1, Vitalie Stavila3
1NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD 20899-6102, United States.
概括
CB11H12表现出比和类似物更低的温度顺序-混乱过渡,对于固态电池电解质至关重要. 然而,其离子导电性较低,这是由于固态阻碍.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 电化学 电化学 电化学
背景情况:
- 多德甲-单碳-密度-多德甲盐 (M11H12,M:Li,Na) 在无序相中显示出高离子导电性,这使得它们对全固态电池充满希望.
- 一个关键的挑战是,在实际设备应用中,降低干扰温度.
研究的目的:
- 研究同源KCB11H12的结构和动态特性.
- 比较其性能,特别是秩序-混乱过渡温度和离子导电性,与LiCB11H12和NaCB11H12进行比较.
主要方法:
- 射线粉的X射线衍射方法
- 不同扫描热量计差异扫描热量计.
- 中子振动光谱学 中子振动光谱学
- 核磁共振是一种核磁共振.
- 准弹性中子散射是什么?
- 交流电阻测量 交流电阻测量
主要成果:
- 与Li/Na类似物相比,KCB11H12在较低的发作温度 (348 K) 经历了由驱动的秩序-混乱过渡.
- 在过渡过程中,K+电离子导电性显著增加,在361K时达到3.2×10−4S cm−1.
- 尽管有过渡,但K+电导率仍然低于Li+和Na+电导率,这是由于硬质障碍造成的.
结论:
- KCB11H12为固态电池电解质提供较低的过渡温度.
- 较大的K+离子经历了更大的硬质障碍,与Li+和Na+相比,限制了其扩散和整体导电性.
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