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相关概念视频

Alkali Metals03:06

Alkali Metals

19.3K
Group 1 elements are soft and shiny metallic solids. They are malleable, ductile, and good conductors of heat and electricity. The melting points of the alkali metals are unusually low for metals and decrease going down the group, while the density increases going down the group with the exception of potassium (Table 1).
Table 1: Properties of the alkali metals
19.3K
Electrolysis03:00

Electrolysis

26.4K
In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
26.4K
Batteries and Fuel Cells03:12

Batteries and Fuel Cells

27.4K
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...
27.4K
Electron Configuration of Multielectron Atoms03:26

Electron Configuration of Multielectron Atoms

41.2K
The alkali metal sodium (atomic number 11) has one more electron than the neon atom. This electron must go into the lowest-energy subshell available, the 3s orbital, giving a 1s22s22p63s1 configuration. The electrons occupying the outermost shell orbital(s) (highest value of n) are called valence electrons, and those occupying the inner shell orbitals are called core electrons. Since the core electron shells correspond to noble gas electron configurations, we can abbreviate electron...
41.2K
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

17.1K
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...
17.1K
Ionic Bonds00:42

Ionic Bonds

118.4K
Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
118.4K

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相关实验视频

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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

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建筑稳定固态金属电池 建筑稳定固态金属电池

Wang Lyu1, Xinzhi Yu1,2, Yawei Lv1

  • 1School of Physics and Electronics, Hunan University, Changsha, 410082, P. R. China.

Advanced materials (Deerfield Beach, Fla.)
|January 31, 2024
PubMed
概括

研究人员使用一种新的化固体聚合物电解质 (ISPE) 开发了稳定的固态金属电池 (SPMB). 这一突破解决了树石问题,使得高电压,长周期寿命和下一代能源存储的安全性得到提高.

关键词:
高电化学稳定性 高电化学稳定性在现场合金化.有的中间层.金属电池 金属电池固态电池 固态电池是什么

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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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Focused Ion Beam Fabrication of LiPON-based Solid-state Lithium-ion Nanobatteries for In Situ Testing
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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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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
  • 储能 储能 储能 储能 储能 储能

背景情况:

  • 固态金属电池 (SPMB) 具有安全,高能量密度存储的潜力,但面临着树突和电解质不稳定性等挑战.
  • 现有的固态电解质往往表现出差的界面兼容性和有限的离子导电性,阻碍了实际的SPMB开发.

研究的目的:

  • 为高性能SPMB开发稳定高效的固态电解质.
  • 为了克服金属阳极中的界面不相容性和树突形成.
  • 为了证明SPMBs在实际储能应用中的可行性.

主要方法:

  • 一种新的固体聚合物电解质 (ISPE) 的合成和表征.
  • 研究ISPE与金属的离子传输机制和接口特性.
  • 使用普鲁士蓝色阴极和ISPE的SPMB的组装和电化学测试,包括循环和速率能力评估.

主要成果:

  • 开发的ISPE具有高离子导电性,与金属的绝佳界面兼容性和广泛的电化学稳定性.
  • 带有ISPE的SPMB在4.5V时表现出稳定的运行,在4.2V时达到3000多个周期,具有99.94%的库伦比效率.
  • 一个固态金属袋式电池在4.2V的电压下实现了800个循环,容量保持率为93.6%.

结论:

  • 新型ISPE有效抑制树突,增强界面稳定性,使高性能SPMBs成为可能.
  • 这项工作为开发安全和高性能可充电固态金属电池提出了可行的战略.
  • 取得的结果为下一代储能解决方案铺平了道路,利用丰富的资源.