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相关概念视频

Electrodeposition01:08

Electrodeposition

1.7K
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...
1.7K
The Electrical Double Layer01:30

The Electrical Double Layer

67
In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
67
Ionic Compounds: Formulas and Nomenclature03:34

Ionic Compounds: Formulas and Nomenclature

89.3K
An element composed of atoms that readily lose electrons (a metal) can react with an element composed of atoms that readily gain electrons (a nonmetal) to produce ions through complete electron transfer. The compound formed by this transfer is stabilized by the electrostatic attractions (ionic bonds) between the oppositely charged ions.
89.3K
Formation of Complex Ions03:45

Formation of Complex Ions

26.5K
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
26.5K
Weak Acid Solutions04:02

Weak Acid Solutions

44.2K
Few compounds act as strong acids. A far greater number of compounds behave as weak acids and only partially react with water, leaving a large majority of dissolved molecules in their original form and generating a relatively small amount of hydronium ions. Weak acids are commonly encountered in nature, being the substances partly responsible for the tangy taste of citrus fruits, the stinging sensation of insect bites, and the unpleasant smells associated with body odor. A familiar example of a...
44.2K
Ionic Association01:28

Ionic Association

19
The ionic association is the association of oppositely charged ions in an electrolyte solution to form ion pairs. Bjerrum defined ion pairs as two oppositely charged ions whose electrostatic attraction exceeds the thermal energy of the system, typically expressed as 2kT. Electrostatic attraction depends on ionic charge, separation distance, and the dielectric constant of the medium. Thermal energy, represented by kT, reflects the tendency of ions to move independently due to molecular motion.
19

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相关实验视频

Updated: Mar 7, 2026

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
10:03

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

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多元组件固体溶液合金负极用于金属电池.

Jinxi Wang1,2,3,4, Jiawen Zhu1,2,3,4, Yichao Cai5

  • 1Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, China.

Nature communications
|March 5, 2026
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种用于电池电极的新金属合金. 这种无石合金使金属电池具有高能量密度和长周期寿命.

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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:

  • 金属电池具有高的理论能量密度,但由于传统电极中的利用率低,因此面临着石形成和周期寿命有限的挑战.
  • 实际的金属电池通常只使用30-50%的理论容量,以减轻状物问题并提高稳定性.
  • 开发稳定和高容量的金属阳极对于下一代能源存储至关重要.

研究的目的:

  • 为金属阳极设计一种新型多元件固体溶液合金.
  • 为了增强离子运输,并抑制金属电池中的树突形成.
  • 在实际电池应用中实现高可逆容量和长周期寿命.

主要方法:

  • 制造一种多元合金,含有~90%的和相等的,银,和的原子比.
  • 使用效应研究原子扩散性和表面沉积机制.
  • 用 LiNi0.8Co0.1Mn0.1O2 阴极进行袋式电池中合金阳极的电化学测试.

主要成果:

  • 合金具有较高的原子扩散性,并促进稳定的 (110) 晶面,从而导致向内运输.
  • 这样,可以实现一个无树脂的阳极,其高可逆特异容量为3100 mAh g−1.
  • 袋式电池表现出 385 Wh kg-1 的高特异能,在 600 个周期内保持 82% 的容量.

结论:

  • 开发的金属合金有效抑制了树岩的形成,并提高了的利用率.
  • 这种合金阳极设计为实现安全,高能量密度和耐用金属电池提供了有前途的途径.
  • 这些发现为先进的金属电池技术的实际应用铺平了道路.