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相关概念视频

Batteries and Fuel Cells03:12

Batteries and Fuel Cells

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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...
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Ionic Bonds00:42

Ionic Bonds

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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...
128.7K
Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

48.7K
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. 
48.7K
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,...
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Electrolysis03:00

Electrolysis

30.2K
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...
30.2K
Formation of Complex Ions03:45

Formation of Complex Ions

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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...
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相关实验视频

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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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具有连续垂直对齐的路径的超离子复合电解质,用于低压全固态电池.

Xuexia Lan1,2, Zhen Li1, Chao Zhao1

  • 1Institute of Technology for Carbon Neutrality, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.

Nature nanotechnology
|January 16, 2026
PubMed
概括

研究人员开发了一种新的复合物固体电解质,用于更安全的高能电池. 这种设计实现了高离子导电性和机械灵活性,克服了电池技术中的关键权衡.

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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
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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
  • 固态电池 固态电池是什么

背景情况:

  • 固体电解质对于开发安全的高能量密度电池系统至关重要.
  • 复合固体电解质提供了高离子导电性和稳定的接口的潜力,但在平衡离子和机械性能方面面临挑战.
  • 在固体电解质中,离子导电效率和机械强度之间经常存在根本的权衡.

研究的目的:

  • 设计一种复合固体电解质,使离子导电与机械灵活性脱.
  • 为了实现高离子导电性,并保持与电极的机械接触,以提高电池性能.
  • 为先进的电池应用展示一种多功能复合结构.

主要方法:

  • 复合体固体电解质的制造,其中交替使用垂直对齐的 (PA) Li$_{0.3}$Cd$_{0.85}$PS$_{3}$纳米板和含的聚乙烯氧化物 (PEO) 层.
  • 关于PA-Li$_{0.3}$Cd$_{0.85}$PS$_{3}$/PEO复合物的离子导电性和机械性能的描述.
  • 使用开发的复合电解质测试LiLiNi_{0.8}$Co$_{0.1}$Mn$_{0.1}$O$_{2}$硬币细胞和LiLiLiLiFePO_{4}$囊细胞.

主要成果:

  • 在25°C时达到10.2mS cm-1的高离子导电性.
  • 证明了极好的循环稳定性,在LijidoseLiNi_{0.8}$Co$_{0.1}$Mn$_{0.1}$O$_{2}$硬币细胞中,在600个循环后保持92%的容量.
  • 成功地促进了 Li 下载 LiFePO_{4}$ 囊细胞的低压运行.
  • 通过创建一个PA-Li$_{0.46}$Mn$_{0.77}$PS$_{3}$/PEO电解质,具有6.1mS cm-1的离子导电性和良好的灵活性来验证设计.

结论:

  • 拟议的复合固体电解质设计成功地将离子导电与机械灵活性脱.
  • 这种架构使高离子导电性和稳定的电极接口成为可能,这对于先进的电池性能至关重要.
  • 该战略为开发更安全,高性能固态电池提供了一个有希望的途径.