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相关概念视频

Alkali Metals03:06

Alkali Metals

18.9K
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
18.9K
Electrolysis03:00

Electrolysis

25.7K
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...
25.7K
Intermolecular Forces03:13

Intermolecular Forces

56.1K
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
56.1K
Ionic Strength: Effects on Chemical Equilibria01:19

Ionic Strength: Effects on Chemical Equilibria

1.3K
The addition of an inert ionic compound increases the solubility of a sparingly soluble salt. For example, adding potassium nitrate to a saturated solution of calcium sulfate significantly enhances the solubility of calcium sulfate. Le Châtelier's principle cannot predict this shift in the equilibrium. Instead, this could be explained in terms of changes in the effective concentration of the ions in solution in the presence of added inert salt.
In this solution, the primary...
1.3K
Formation of Complex Ions03:45

Formation of Complex Ions

23.0K
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...
23.0K
Electrodeposition01:08

Electrodeposition

443
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...
443

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相关实验视频

Updated: May 15, 2025

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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对于高度稳定的金属阳极,表面工作功能诱导的高固体电解质相间形成.

Lili Song1, Qiaoxi Yang1, Yu Yao2

  • 1Nanjing Normal University, School of Chemistry and Materials Science, CHINA.

Angewandte Chemie (International ed. in English)
|May 14, 2025
PubMed
概括
此摘要是机器生成的。

为金属电池开发了一种新的高固体电解质介相 (SEI) 层. 这种稳定的SEI层提高了电池性能和循环寿命,解决了电池应用中的关键局限性.

关键词:
没有树的沉积.异构结构 异构结构具有高值的值.金属阳极是一种金属阳极.固体电解质相间阶段

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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:

  • 固体电解质介相 (SEI) 层故障是金属电池实际应用的关键挑战.
  • 开发稳定的SEI层对于推进高性能储能设备至关重要.

研究的目的:

  • 为金属阳极设计和制造一种新的高性SEI层.
  • 调查在位产生的SEI层的形成机制和性质.
  • 为了评估金属电池的电化学性能,使用工程SEI.

主要方法:

  • 在多孔脚手架上Sn3O4/Sn2S3接口层的现场电化学转化.
  • 理论研究和实验技术分析异构结构和SEI属性.
  • 对称细胞和全细胞的电化学测试,使用烯-3,4,9,10-四碳酸二化阴极.

主要成果:

  • 成功形成了一个具有低表面粗性,低表面潜力和快速离子传输的高性SEI层.
  • 设计的SEI层表现出优异的机械性能 (Young的模量为20.08 GPa).
  • 金属阳极表现出优越的速率性能 (高达10 mA cm-2) 和循环稳定性 (2500小时在0.5 mA cm-2).
  • 在10°C的1650个循环中,充满电池保持了81.6%的容量.

结论:

  • 开发的高性SEI层有效地抑制金属电池中的SEI故障.
  • 这种方法提供了一个简单而有效的策略,用于在金属阳极上创建稳定的接相.
  • 这些发现为高性能金属电池的实际应用铺平了道路.