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相关概念视频

Metallic Solids02:37

Metallic Solids

18.3K
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....
18.3K
Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

41.2K
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions. 
41.2K

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相关实验视频

Updated: Jun 8, 2025

Three-electrode Coin Cell Preparation and Electrodeposition Analytics for Lithium-ion Batteries
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Three-electrode Coin Cell Preparation and Electrodeposition Analytics for Lithium-ion Batteries

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基于三维共价有机框架的人工介相层赋予金属阳极具有高稳定性的高稳定性.

Kaiyang Zheng1, Zhengyang Gou1, Cen Zhang1

  • 1College of Chemistry and Pharmaceutical Engineering, Hebei University of Science and Technology Shijiazhuang 050018 China sjliu16@163.com ytzhang@hebust.edu.cn.

Chemical science
|November 6, 2024
PubMed
概括

一个新的3D共价有机框架 (COF) 作为金属电池的强大的人工固态电解质接口 (SEI). 这种先进的SEI层增强了离子导电和稳定性,使电池寿命更长.

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Focused Ion Beam Fabrication of LiPON-based Solid-state Lithium-ion Nanobatteries for In Situ Testing
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Preparation of Graphene Liquid Cells for the Observation of Lithium-ion Battery Material
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Preparation of Graphene Liquid Cells for the Observation of Lithium-ion Battery Material

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Three-electrode Coin Cell Preparation and Electrodeposition Analytics for Lithium-ion Batteries
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Focused Ion Beam Fabrication of LiPON-based Solid-state Lithium-ion Nanobatteries for In Situ Testing
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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
  • 聚合物化学 聚合物化学

背景情况:

  • 金属电池需要强大的固态电解质接口 (SEI),以克服树生长等挑战.
  • 人工SEI层,特别是那些基于有机聚合物,如共价有机框架 (COFs) 的人工SEI层,提供可调节的特性,以提高电池性能.

研究的目的:

  • 合成和评估3D共价有机框架 (COF) 作为金属电池的人工SEI层.
  • 调查COF的结构和功能组对离子动态和沉积的影响.
  • 为了证明使用3D-COF SEI的金属电池的增强稳定性和性能.

主要方法:

  • 一个3D COF的合成与二元拓和3D空间几何对称.
  • 合成的COF作为人工SEI层在金属电池配置中的应用.
  • 利用密度函数理论 (DFT) 的计算与现场和现场表征一起分析接口属性.

主要成果:

  • 在10 mA cm-2的对称Li धूपLi电池中,在超过9400小时内达到超低极化电压 (46 mV).
  • 在3D-COF修改的LiidiyeS和LiidiyeLFP全细胞中,证明了高的Li+利用率,低极化和延长寿命.
  • 揭示了离子动态和沉积上相互透的链段和性群体的积极影响.

结论:

  • 3D-COF作为一个高度可靠的人工SEI,显著提高金属电池的稳定性.
  • 多维多孔聚合物SEI层显示出开发高度稳定和持久的金属电池的巨大前景.
  • 该研究提供了对先进的SEI材料设计原则的见解,以实现下一代能源存储.