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相关概念视频

Batteries and Fuel Cells03:12

Batteries and Fuel Cells

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A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
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Molecular and Ionic Solids02:54

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Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
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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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Structures of Solids02:22

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Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
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Network Covalent Solids02:18

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Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
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Chloride ions contribute to the osmotic pressure gradient distinguishing the intracellular fluid (ICF) from the extracellular fluid (ECF). They counterbalance positively charged ions in the ECF and ensure its electrochemical stability. The renal system's process of chloride absorption and release generally mirrors that of sodium ions.
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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透聚乙烯涂层化物固体电解质使超高阴极的稳定全固态电池成为可能.

Xiao-Bin Cheng1, Yulong Zhao2, Xu-Dong Hao1

  • 1Department of Applied Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China.

Nano letters
|January 27, 2026
PubMed
概括

研究人员开发了一种灵活的涂层,用于全固态电池 (ASSLB) 中的固体电解质. 这一创新提高了稳定性和性能,为更安全,高能量密度的电池铺平了道路.

关键词:
所有固态电池都是固态电池.化物固体电解质的电解质.接口工程 接口工程 接口工程有固体电解质涂层的电解质.超高阴极是超高的阴极.

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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:

  • 具有超高阴极的全固态电池 (ASSLB) 承诺高能量密度和安全性.
  • 挑战包括不良的接口兼容性和高电压下氧化分解.
  • 开发稳定的接口对于下一代ASSLBs至关重要.

研究的目的:

  • 在ASSLB中为化物固体电解质设计一个稳定的接口.
  • 提高固体电解质的机械灵活性和电化学稳定性.
  • 为了使ASSLBs具有超高阴极的高压运行.

主要方法:

  • 涂层化物固体电解质Li0.9NbO0.9Cl4.1 (LNOC) 通过球磨,用化聚碳酸 (PFPE-COOH) 进行涂层.
  • 涂层厚度,离子导电性和机械性能的表征.
  • 使用修改LNOC和单晶LiNi0.92Co0.05Mn0.03O2阴极的ASSLB的制造和电化学测试.

主要成果:

  • 在LNOC上实现了1.2纳米的均PFPE-COOH涂层,保持高离子导电性 (5.82mS cm-1).
  • 这种涂层有效地抑制了氧化分解,并将LNOC的Young模量从3.78降低到1.53 GPa.
  • ASSLBs表现出异常的循环稳定性,在4.6V的切断电压下,在400个循环后保持80.6%的容量.

结论:

  • PFPE-COOH涂层为化物固体电解质提供了有效的接口工程策略.
  • 改性电解质增强了高压ASSLB的机械灵活性和电化学稳定性.
  • 这种方法促进了高能量密度和长周期全固态电池的开发.