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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
Electrodeposition01:08

Electrodeposition

638
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
638
Corrosion02:49

Corrosion

24.5K
The degradation of metals due to natural electrochemical processes is known as corrosion. Rust formation on iron, tarnishing of silver, and the blue-green patina that develops on copper are examples of corrosion. Corrosion involves the oxidation of metals. Sometimes it is protective, such as the oxidation of copper or aluminum, wherein a protective layer of metal oxide or its derivatives forms on the surface, protecting the underlying metal from further oxidation. In other cases, corrosion is...
24.5K
Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

587
Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
587
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate02:21

Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate

11.6K
Alkenes can be dihydroxylated using potassium permanganate.  The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
11.6K
Potentiometry: Types of Electrodes01:19

Potentiometry: Types of Electrodes

664
Reference electrodes serve as a stable reference point for potentiometric measurements, while indicator and working electrodes react to variations in the composition of a solution.
The Standard Hydrogen Electrode (SHE) is a widely used reference electrode that maintains zero potential across all temperatures. However, its need for a continuous hydrogen gas supply renders it impractical for everyday use.
An alternative to SHE is the Saturated Calomel Electrode (SCE). This electrode features an...
664

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Updated: Jul 8, 2025

The Effect of Anodization Parameters on the Aluminum Oxide Dielectric Layer of Thin-Film Transistors
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The Effect of Anodization Parameters on the Aluminum Oxide Dielectric Layer of Thin-Film Transistors

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动态演变的多功能保护层,用于高度稳定的金属阳极.

Zhen Sun1, Miao Liu1, Bingqian Liu1

  • 1State Key Laboratory of Chem/Bio-Sensing and Chemometrics, Advanced Catalytic Engineering Research Center of the Ministry of Education, College of Chemistry and Chemical Engineering, Hunan University, Changsha, Hunan 410082, People's Republic of China.

ACS applied materials & interfaces
|December 11, 2023
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种新的动态策略,在金属阳极上创建保护性K-Ge合金层. 这一层有效地抑制了树的生长,使电池能够稳定地运行超过1000小时.

关键词:
人工保护层是一种人造的保护层.没有树石的树石.高离子导电性的高离子导电性.金属电池 金属电池

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相关实验视频

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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:

  • (K) 金属阳极面临的挑战包括不受控制的树突生长和不稳定的固体电解质介相 (SEI).
  • 人工保护层对于稳定高能电池中的K金属阳极至关重要.
  • 现有的 *in situ* 和 *ex situ* 制造方法都有其局限性.

研究的目的:

  • 提出一种新的动态进化策略,用于制造K金属阳极上的多功能保护层.
  • 整合"现场"和"现场"准备技术的优势.
  • 为了提高电池应用中的K金属阳极的稳定性和性能.

主要方法:

  • 通过表面修饰和*in situ*电化学还原,在K金属上制备K-Ge合金丰富的保护层.
  • 保护层的特性,包括性,机械灵活性和离子导电性.
  • 在对称电池和全电池中测试K金属阳极,以评估/条纹行为,循环稳定性和速率性能.

主要成果:

  • 多功能保护层具有出色的性,机械灵活性和高离子导电性.
  • 保护的K电极表现出无树的K/条纹行为.
  • 相对称的电池在1 mA cm-2和1 mAh cm-2下实现了1000多小时的稳定运行,而全电池与裸体K阳极相比显示了增强的速率和循环性能.

结论:

  • 动态进化策略有效地创建了一个保护性的K-Ge合金层,抑制了树的生长并减少了副作用.
  • 这种方法显著提高了K金属阳极的电化学性能和稳定性.
  • 该战略为保护金属阳极提供了一个有希望的新途径,可以扩展到其他高能电池系统.