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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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Preparation and Reactions of Sulfides02:26

Preparation and Reactions of Sulfides

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Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
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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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相关实验视频

Updated: Jun 2, 2025

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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具有快速固态硫反应的全固态Li-S电池

Huimin Song1, Konrad Münch2,3, Xu Liu1

  • 1Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, School of Materials Science and Engineering, Peking University, Beijing, China.

Nature
|January 15, 2025
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种全固态硫电池的酸玻璃相固体电解质. 这一突破使得固体-固体硫氧化还原反应快速,提高了电池的性能和周期寿命.

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Focused Ion Beam Fabrication of LiPON-based Solid-state Lithium-ion Nanobatteries for In Situ Testing
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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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相关实验视频

Last Updated: Jun 2, 2025

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Focused Ion Beam Fabrication of LiPON-based Solid-state Lithium-ion Nanobatteries for In Situ Testing
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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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科学领域:

  • 材料科学
  • 电化学
  • 能量储存

背景情况:

  • 全固态硫电池 (ASSLSB) 为下一代储能提供高能耗,安全性和低成本.
  • 在ASSLSB中的低速性能和短周期寿命归因于三相边界的缓慢的固体-固体硫氧化还原反应 (SSSRR).

研究的目的:

  • 通过增强缓慢的SSSRR来解决ASSLSB的局限性.
  • 开发一种新型的固体电解质,可以作为减氧介质加速SSRR.

主要方法:

  • 硫酸 (LBPSI) 玻璃相固体电解质 (GSEs) 的开发.
  • 使用固体电解质中的I-/I2/I3-可逆氧化还原作为表面氧化还原介质.
  • 研究氧化还原介质对活性位点密度和反应动力学的影响.

主要成果:

  • LBPSI GSE促进了快速的SSRR,显著增加了活跃地点的密度.
  • ASSLSB在2C时显示出1497mAhg-1硫的超快充电能力,在20C时保持784mAhg-1硫.
  • 在极端速率 (432mAhg-1硫在150°C,60°C) 和循环稳定性 (80.2%在5°C的25,000个循环中保持) 中观察到异常性能.

结论:

  • 开发的LBPSI GSE有效地调解SSRR,克服了ASSLSB的先前局限性.
  • 这种以氧化还原为媒介的方法使ASSLSB具有高速率的能力和卓越的循环稳定性.
  • 这些发现为先进,高能耗和安全的ASSLSB铺平了道路.