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相关概念视频

Ionic Crystal Structures02:42

Ionic Crystal Structures

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Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
16.7K
Metallic Solids02:37

Metallic Solids

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Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
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一种基于三维结构齐奥利特网络的固体复合电解质,用于高性能固态金属电池.

Zhaodi Luo1, Yuxin Cui1,2, Zixuan Zhang1

  • 1State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University Changchun 130012 P. R. China jihong@jlu.edu.cn malinl@jlu.edu.cn.

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概括

一种新型的复合体固体电解质,在聚合物矩阵中使用3D热氧体网络,显著提高了固态金属电池的离子导电性和稳定性.

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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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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
  • 聚合物科学 聚合物科学

背景情况:

  • 固态聚合物电解质 (SPEs) 对于固态金属电池 (SSLMB) 是非常重要的,因为它们的灵活性.
  • 挑战包括实现高离子导电性,稳定性和与金属阳极的良好界面兼容性.
  • 现有的SPE往往无法满足实际应用的这些苛刻要求.

研究的目的:

  • 为SSLMBs开发一种复合固体电解质 (CSE),以提高其性能.
  • 调查三维热带石网络在增强离子传输和接口特性中的作用.
  • 克服传统的基于聚乙烯氧化物的SPE的局限性.

主要方法:

  • 合成了一种复合固体电解质 (CSE) 通过将3D热网 (3D Zeo) 纳入一个用LiTFSI盐的聚乙烯氧化物 (PEO) 矩阵.
  • 描述了3D Zeo/PEO CSE的离子导电性,电化学稳定性窗口和接口特性.
  • 使用开发的CSE.评估了对称和完整的SSLMB细胞的循环性能.

主要成果:

  • 3D Zeo/PEO CSE在室温下实现了1.62 × 10−4 S cm−1的离子导电性,这与LiTFSI-PEO SPE (3.23 × 10−6 S cm−1) 相比是显著的改进.
  • 显示了高达5.7V的增强电化学稳定性窗口,与Li+/Li相比.
  • 在对称细胞中经过2300小时以上的稳定循环,在室温下在完整细胞中经过500个循环后保持92%的容量保留.

结论:

  • 相互连接的3D热带石网络促进了Li+导电,并促进了聚合物无形化和盐分离.
  • 与传统的SPEs和充满颗粒的CSEs相比,3D Zeo/PEO CSE提供了优越的离子导电性,电化学稳定性和界面兼容性.
  • 这项工作提出了一个可行的策略,用于设计先进的CSEs,用于高性能SSLMBs,具有统一的Li+沉积.