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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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Formation of Complex Ions03:45

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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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The corrosion of steel reinforcement within concrete is a process influenced by the material's inherent properties and external factors. The high pH level of around 13, provided by calcium hydroxide present in concrete, initially protects the steel reinforcement by promoting the formation of a passive iron oxide layer on its surface.
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Standard Electrode Potentials03:02

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On comparing the reactivity of silver and lead, it is observed that the two ionic species, Ag+ (aq) and Pb2+ (aq), show a difference in their redox reactivity towards copper: the silver ion undergoes spontaneous reduction, while the lead ion does not. This relative redox activity can be easily quantified in electrochemical cells by a property called cell potential. This property is commonly known as cell voltage in electrochemistry, and it is a measure of the energy which accompanies the charge...
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用硫驱动的结构增强,用于长寿命的离子储存.

Haiyang Wu1, Diwen Zhang2, Yilei Yue3

  • 1Hubei Provincial Collaborative Innovation Center for New Energy Microgrid, College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, Hubei, China.

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用硫添加的二氧化 (S-VO2) 通过提高阴极稳定性和电荷传输来增强水性离子电池 (AZIB). 这种新型材料为先进的能源存储提供了更高的容量和长期耐用性.

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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:

  • 高性能阴极材料对于水性离子电池 (ZIB) 的发展至关重要.
  • 挑战包括提高稳定性和电荷运输动力学,同时抑制材料降解.

研究的目的:

  • 开发一种用于ZIBs的新型阴极材料,使用硫二氧化 (S-VO2).
  • 为了研究加入硫对电子结构,瓦纳溶解和电化学性能的影响.

主要方法:

  • 合成 S-VO2 阴极材料.
  • 电化学测试包括特定容量,循环稳定性和速率能力.
  • 使用现场XRD,现场Raman,XPS,XANES和EXAFS进行材料表征.

主要成果:

  • S-VO2阴极在0.1 A g-1下产生了386.3 mA h g-1的高特异容量.
  • 卓越的长期循环稳定性,在2.0A g-1的1600个循环后保持79.6%的容量,在10.0A g-1的6000个循环后保持80.3%.
  • 硫兴奋剂诱导氧气空缺,增强导电性,加强V-O键,并稳定了的局部协调环境.

结论:

  • 硫注射是一种有效的策略,可以提高VO2基阴极对ZIB的性能和稳定性.
  • 硫和氧缺陷的协同效应优化了下一代AZIBs的阴极材料设计.
  • S-VO2为实现高性能和可靠的水性离子电池系统提供了一个有希望的途径.