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相关概念视频

Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

41.6K
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions. 
41.6K
Electrolysis03:00

Electrolysis

26.5K
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...
26.5K
Batteries and Fuel Cells03:12

Batteries and Fuel Cells

27.5K
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
27.5K
Ionic Bonds00:42

Ionic Bonds

118.5K
Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
118.5K
Voltaic/Galvanic Cells02:47

Voltaic/Galvanic Cells

57.4K
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,...
57.4K
Alkali Metals03:06

Alkali Metals

19.3K
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
19.3K

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相关实验视频

Updated: Jul 11, 2025

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

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氧气调节的自发固体电解质间相使超稳定的固态Na金属电池成为可能.

Keshuang Cao1, Yufan Xia1, Haosheng Li1

  • 1School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China; ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 311200, China.

Science bulletin
|November 16, 2023
PubMed
概括

一个创新的氧气调节的固体电解质间相 (SEI) 增强了固态电池的稳定性. 这种方法防止了树的生长,使半固态电池能够保持超过6600小时的稳定循环和高容量保留.

关键词:
阳极接口的接口是阳极接口.纳米金属阳极是一种金属阳极.纳西康尼 (Nasicon) 是一个国家.固体电解质相间阶段固态电池是一种固态电池.

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Elemental-sensitive Detection of the Chemistry in Batteries through Soft X-ray Absorption Spectroscopy and Resonant Inelastic X-ray Scattering
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Elemental-sensitive Detection of the Chemistry in Batteries through Soft X-ray Absorption Spectroscopy and Resonant Inelastic X-ray Scattering
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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:

  • 固态金属电池提供安全性和高能量密度.
  • 在阳极-固体电解质 (SE) 界面的界面不稳定性导致树的透和电池故障.
  • Na-Na3Zr2Si2PO12接口表现出一种不均的,高电阻的固体电解质接相 (SEI).

研究的目的:

  • 开发一种氧气调节的SEI,以提高固态电池中阳极-SE接口的稳定性.
  • 为了提高固态金属电池的循环稳定性和性能.

主要方法:

  • 金属 (含微量氧) 和Na3Zr2Si2PO12SE之间发生的一种自发反应,形成一个受氧调节的SEI.
  • 对称细胞的制造和测试,以评估涂/剥离的稳定性.
  • 准固态电池的组装和循环使用Na3V2(PO4) 3阴极.

主要成果:

  • 氧气调节的SEI是薄的,均的,动力稳定的,促进同质的Na+运输.
  • 对称细胞表现出超稳定的涂/剥离,在3 mAh cm-2的6600个小时以上.
  • 准固态电池实现了超过500个循环,在0.5°C时保持95.4%的容量.

结论:

  • 氧调节的SEI策略有效地稳定了固态电池中的阳极-SE接口.
  • 这种方法显著提高了循环稳定性和能量密度潜力.
  • 拟议的方法为开发高性能固态金属电池提供了一个有前途的途径.