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相关概念视频

Electrodeposition01:08

Electrodeposition

634
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...
634
Standard Electrode Potentials03:02

Standard Electrode Potentials

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On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
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Corrosion of Reinforcement01:27

Corrosion of Reinforcement

185
The corrosion of steel reinforcement within concrete is a process influenced by the material's inherent properties and external factors. The high pH level of around 13, provided by calcium hydroxide present in concrete, initially protects the steel reinforcement by promoting the formation of a passive iron oxide layer on its surface.
However, over time and under certain conditions like carbonation, chloride ingress, and cracking this protective state can be compromised. Steel has areas with...
185
Corrosion02:49

Corrosion

24.3K
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...
24.3K
Colloidal precipitates01:09

Colloidal precipitates

580
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
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相关实验视频

Updated: Jul 3, 2025

Zinc-Sponge Battery Electrodes that Suppress Dendrites
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对于具有高利用率的稳定Zn阳极的背面涂层.

Nute Yang1,2, Yong Gao1,2, Fan Bu1,2

  • 1Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, 710072, China.

Advanced materials (Deerfield Beach, Fla.)
|February 13, 2024
PubMed
概括
此摘要是机器生成的。

阳极上的新背面涂层提高了离子电池的稳定性和性能. 这种方法防止了树的生长,使高的利用成为实用,高能量密度的电池.

关键词:
Zn Zn利用率的使用率背面的涂层是背面的涂层高能量密度,高能量密度.稳定的稳定性 稳定的稳定性阳极是一种阳极.

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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
  • 储能 储能 储能 储能 储能 储能

背景情况:

  • 具有高利用率的稳定 (Zn) 阳极对于推进离子电池 (ZIB) 至关重要.
  • 由于阳极不稳定,目前的ZIB技术面临着实现高特异性和体积能量密度的挑战.
  • 现有的解决方案往往涉及表面涂层,这些涂层有局限性.

研究的目的:

  • 开发一种新的阳极策略,以提高ZIB的循环稳定性.
  • 为了研究背面涂层对 Zn 阳极性能的影响.
  • 为了改善Zn利用率和能量密度,用于实际的ZIB应用.

主要方法:

  • 制造和测试了带有背面涂层的薄膜.
  • 在高放电深度下评估了电化学循环稳定性.
  • 性能与裸裸的 Zn 阳极和表面涂层的 Zn 相比较.
  • 一个使用新型阳极的全细胞被组装和测试.

主要成果:

  • 背面涂层的 Zn 阳极显示出显著增强的循环稳定性.
  • 涂层有效地降低了应力度,改善了热扩散,并促进了电子转移.
  • 防止了树的生长和结构损伤,即使在高利用率 (85.5%).
  • 阳极实现了334小时的稳定循环,超过了以前的方法.
  • 一个完整的电池表现出稳定的性能,利用率为69.4%,能量密度高 (155.8 Wh kg-1 / 178 Wh L-1).

结论:

  • 背面涂层的Zn阳极提供了一种优越的方法来提高ZIB的稳定性和性能.
  • 这种方法有效地解决了在高利用率下树突形成和结构降解的问题.
  • 开发的阳极技术为实用,高能量密度的ZIB铺平了道路.