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Ions and Ionic Charges03:27

Ions and Ionic Charges

78.8K
In ordinary chemical reactions, the nucleus — which contains the protons and neutrons of each atom and thus identifies the element — remains unchanged. Electrons, however, can be added to atoms by transfer from other atoms, lost by transfer to other atoms, or shared with other atoms. The transfer and sharing of electrons among atoms govern the chemistry of the elements. During the formation of some compounds, atoms gain or lose electrons to form electrically charged particles called...
78.8K
Trends in Lattice Energy: Ion Size and Charge02:54

Trends in Lattice Energy: Ion Size and Charge

26.6K
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
26.6K
Formal Charges02:42

Formal Charges

40.1K
In some cases, there are seemingly more than one valid Lewis structures for molecules and polyatomic ions. The concept of formal charges can be used to help predict the most appropriate Lewis structure when more than one reasonable structure exists.
40.1K
Ion Channels01:19

Ion Channels

91.2K
The movement of ions like sodium, potassium, and calcium into and out of the cell is essential to maintain the electrochemical gradient in living cells. The ion channels—a class of membrane transport proteins—help maintain this ionic gradient for the smooth functioning of physiological activities such as maintaining cell size and volume, conducting nerve impulses, and gas and nutrient exchange.
Ion channels are specialized integral membrane proteins on the plasma membrane that allow...
91.2K
Atomic Radii and Effective Nuclear Charge03:08

Atomic Radii and Effective Nuclear Charge

61.8K
The elements in groups of the periodic table exhibit similar chemical behavior. This similarity occurs because the members of a group have the same number and distribution of electrons in their valence shells.
61.8K
Ions as Acids and Bases02:54

Ions as Acids and Bases

26.2K
Salts with Acidic Ions
Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
26.2K

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Three-electrode Coin Cell Preparation and Electrodeposition Analytics for Lithium-ion Batteries
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通过高精度操作显微镜绘制高负载离子电池的快速充电安全极限.

Rajeev K Gopal1, Bingyuan Ma2, Peng Bai1,2

  • 1Department of Energy Environmental and Chemical Engineering, Washington University in St. Louis, St. Louis, Missouri, USA.

Small (Weinheim an der Bergstrasse, Germany)
|January 23, 2026
PubMed
概括

本研究介绍了一种方法,使用透明的微型电池观察离子电池 (LIB) 中的涂层. 这使得在板发生之前充电容量增加了54%,提高了电池的安全性和性能.

关键词:
基于以太的电解质.快速的低温充电 快速的低温充电涂层是的涂层.离子电池安全性 离子电池安全性操作的显微镜.

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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:

  • 离子电池 (LIB) 占据了能源存储的优势,但由于快速充电期间的涂层,它们在循环寿命和安全性方面面临挑战.
  • 涂层会导致不可逆转的容量损失,并可能导致热失控,造成重大安全风险.

研究的目的:

  • 在现实的电池配置中开发一种直接和准确的方法来检测涂层的出现.
  • 通过使离子电池能够更快地充电而不会影响循环寿命,提高其安全性和性能.

主要方法:

  • 在玻璃毛细血管中制造透明的微型LIB,以模仿实际的细胞几何.
  • 使用操作显微镜直接,无损地观察涂层.
  • 使用以太基电解质进行测试,并通过商业材料在硬币细胞中验证发现.

主要成果:

  • 直接观察微小的涂,克服传统电子或X射线技术的局限性.
  • 在使用以太基电解质之前,在涂装开始之前,充电能力得到了多达54%的改善.
  • 在硬币电池中成功复制了改进的充电能力,证实了实际应用.

结论:

  • 透明的微型LIB为研究涂层动态提供了一个可行的平台.
  • 这些发现可以通过提供基于温度和充电速度的性能图来开发安全快速充电的电池管理系统.
  • 这项研究有助于提高离子电池的循环寿命和安全性.