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相关概念视频

Batteries and Fuel Cells03:12

Batteries and Fuel Cells

30.7K
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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DC Battery01:21

DC Battery

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A conductor needs to be a component of a path that creates a closed loop or full circuit to have a continuous current flowing through it. A current starts to flow if an electric field is created inside an isolated conductor that is not part of a full circuit. The conductor quickly develops a net positive charge at one end and a net negative charge at the other. These charges generate an electric field opposite the direction of the applied electric field, which reduces the current. Eventually,...
1.2K
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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Charging Conductors By Induction01:15

Charging Conductors By Induction

9.0K
The Earth is a good conductor of electricity, and it is so big that it can be considered an infinite source or sink of charges. It can easily exchange charges with any matter.
Generally, conductors like metals do not allow any excess charge to be present on them. Any excess charge added to metals easily flows away, for example, when a metal is placed on the Earth. This process is called earthing.
However, conductors can be charged by a process called induction. For example, consider charging a...
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MOS Capacitor01:25

MOS Capacitor

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A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
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Kirchoff's Rules: Application01:22

Kirchoff's Rules: Application

2.0K
Kirchhoff's rules quantify the current flowing through a circuit and the voltage variations around the loop in a circuit. Applying Kirchhoff's rules generates a set of linear equations that allow us to find the unknown values in circuits. These may be currents, voltages, or resistances.
When applying Kirchhoff's first rule, the junction rule, label the current in each branch and decide its direction. If the chosen direction is wrong, it will have the correct magnitude, although the...
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相关实验视频

Updated: Jan 17, 2026

Construction and Testing of Coin Cells of Lithium Ion Batteries
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Construction and Testing of Coin Cells of Lithium Ion Batteries

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一个实用的4.8-V Li 电池就是LiCoO2电池.

Qi Xiong1,2, Dedi Li2, Shimei Li1,2

  • 1Hong Kong Center for Cerebro-Cardiovascular Health Engineering (COCHE), City University of Hong Kong, Shatin, N. T. 999077, Hong Kong, China.

Science advances
|September 17, 2025
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种新方法,可以使用源稳定高压和氧化电池. 这一突破使得在高达4.8伏的电压下能够稳定循环,大大提高了电子产品的能量密度.

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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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相关实验视频

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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
  • 储能 储能 储能 储能 储能 储能

背景情况:

  • 电池中的高充电电压对便携式电子产品的高能量密度至关重要.
  • 然而,高度脱的LiCoO2 (>4.55V) 呈现出脆弱的接口,导致晶格氧气释放,接口降解和结构崩.

研究的目的:

  • 开发一种在高充电电压下稳定LiLiCoO电池的方法.
  • 为了使能电池在超过4.55V的电压下稳定循环运行,接近理论容量.

主要方法:

  • 利用五甲氧酸作为源来构建强大的富含化的电极-电解质接口.
  • 研究了在高电压 (4.6V,4.7V和4.8V) 下使用的LiLiCoO电池的电化学性能.

主要成果:

  • 在高电压下实现了 Liidiye的 LiCoO2 电池的稳定循环:在 4.6 V 的 1500 个循环,在 4.7 V 的 600 个循环和在 4.8 V 的 188 个循环.
  • 通过使用2.7Ah袋式电池,证明了4.8VLiLiCoO2电池的实用性,实现了544Wh/kg的能量密度和超过50个循环.
  • 开发的接口有效地抑制了在高化状态下接口降解和结构崩.

结论:

  • 基于的接口修改策略成功地稳定了在前所未有的高电压下使用的LiLiCoO电池.
  • 这种方法为实现LiCoO2的理论容量和推进高能量密度电池技术铺平了道路.
  • 这些发现支持4.8V LiCoO2的潜力,用于下一代便携式电子产品和储能解决方案.