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相关概念视频

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...
43.9K
Electrodeposition01:08

Electrodeposition

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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
Ion Exchange01:17

Ion Exchange

592
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
592
Voltaic/Galvanic Cells02:47

Voltaic/Galvanic Cells

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Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
57.3K
Ionic Crystal Structures02:42

Ionic Crystal Structures

14.3K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
14.3K
Metallic Solids02:37

Metallic Solids

18.4K
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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Updated: Jul 5, 2025

Zinc-Sponge Battery Electrodes that Suppress Dendrites
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为高度可逆的阳极构建一个拓适应的固体电解质介面.

Tong Yan1, Sucheng Liu1, Jinye Li2

  • 1Guangdong Provincial Key Laboratory of Fuel Cell Technology, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China.

ACS nano
|January 17, 2024
PubMed
概括
此摘要是机器生成的。

l-谷氨胺添加剂稳定了水性电池中的固体电解质介相 (SEI). 这种混合SEI增强了阳极稳定性,使电池的超长周期寿命和高容量成为可能.

关键词:
Zn金属阳极是一种金属阳极.电解质添加剂是一种电解质添加剂.机械行为 机械行为固体电解质相间阶段在拓上具有可适应性的适应性.

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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:

  • 水性电池由于不稳定的固体电解质介相 (SEI) 和电双层 (EDL) 结构而面临性能限制.
  • 了解SEI的机械性能对于管理电池运行期间体积变化的应力至关重要.

研究的目的:

  • 研究l-胺 (Gln) 作为调节EDL的添加剂,并形成稳定的混合SEI.
  • 评估Gln修改SEI的机械性能和拓适应性.
  • 为了评估阳极与混合SEI在对称和全电池中的电化学性能.

主要方法:

  • 引入l-胺 (Gln) 作为水性电解质的添加剂.
  • 在现场形成由 ZnS 和 Gln 相关物种组成的混合 SEI.
  • 纳米沉积试验以描述SEI的机械性能 (模块,硬度,形状恢复).
  • 电化学测试Zn//Zn对称细胞和Zn//NH4V4O10全细胞.

主要成果:

  • 混合SEI表现出低模量和硬度,具有出色的形状回收.
  • 该SEI有效抑制副作用,并适应阳极的体积波动.
  • Zn//Zn对称细胞实现了4000小时的超长周期寿命.
  • 在袋式电池中,证明了高累积容量18,000 mA h的高累积容量.
  • 该策略在各种N/P比率的全细胞中显示出优异的性能.

结论:

  • 胺是水性电池界面工程的一个有前途的添加剂.
  • 开发的混合SEI显著提高了阳极的稳定性和周期寿命.
  • 这种方法为水性电池系统中先进的界面调制提供了可行的途径.