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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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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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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.
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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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Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
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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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Particles in a solid are tightly packed together (fixed shape) and often arranged in a regular pattern; in a liquid, they are close together with no regular arrangement (no fixed shape); in a gas, they are far apart with no regular arrangement (no fixed shape). Particles in a solid vibrate about fixed positions (cannot flow) and do not generally move in relation to one another; in a liquid, they move past each other (can flow) but remain in essentially constant contact; in a gas, they move...
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在固态电池中的稳定阳极,通过空间重构进行梯度互锁固体电解质间相.

Mingxue Zuo1, Xia Hu1, Changzhi Ji2

  • 1Shandong Key Laboratory of Advanced Electrochemical Energy Storage Technologies, College of New Energy, China University of Petroleum (East China), Qingdao 266580, China.

Journal of the American Chemical Society
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概括
此摘要是机器生成的。

在固态电池 (SSB) 中为阳极使用循环四素,设计了一种"mortise-tenon"固体电解质间相 (SEI). 这样可以稳定电极接口,从而实现高容量,长寿命的储能.

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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
  • 电池技术 电池技术

背景情况:

  • 阳极为固态电池 (SSB) 提供高能量密度.
  • 阳极的体积膨胀会导致固体电解质界面 (SEI) 断裂和界面不稳定.
  • 在SSB中的刚性接口缺乏对体积变化进行机械缓冲.

研究的目的:

  • 为SSB中的阳极开发一个稳定的SEI结构.
  • 为了应对SEI断裂和循环期间电极不稳定的挑战.
  • 提高基于的SSB的性能和周期寿命.

主要方法:

  • 在聚合物电解质中引入循环四西洛,以创建一个"mortise-tenon"的SEI结构.
  • 实现了循环四氧和富含LiF的无机相之间的互锁,以实现SEI的稳定性.
  • 制造并测试了Si 基底管Li半电池和NCM811 基底管Si和LFP 基底管Si全电池.

主要成果:

  • 在大体积变化下",死板"SEI表现出强大的附着性和结构稳定性.
  • 半单元实现了高容量1553.6mAhg-1 在12Ag-1 .
  • 完整细胞表现出良好的容量保留 (97.6%超过300个循环NCM811下载disabledSi) 和低衰变率 (0.07‰每周期LFP下载disabledSi超过700个循环).

结论:

  • 开发的SEI工程战略有效地稳定了SSB中的阳极.
  • 这种方法使得基于的高能量密度SSB的实际应用成为可能.
  • 这种"mortise-tenon"的SEI为持久和高性能储能解决方案提供了一条途径.