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相关概念视频

Batteries and Fuel Cells03:12

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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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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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Standard Electrode Potentials03:02

Standard Electrode Potentials

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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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Generally, a single battery is not enough to power some devices. In such cases, batteries can be combined in two ways: in series or in parallel.
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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...
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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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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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一种活性化物催化剂增强了全固态电池的额外容量.

Zhenyou Song1, Yiming Dai1, Tengrui Wang1

  • 1Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China.

Advanced materials (Deerfield Beach, Fla.)
|June 14, 2024
PubMed
概括

一种新的化物固体电解质 (SE),Li3VCl6,提高了电池的安全性和能量密度. 这种活性物质在与LiFePO4阴极相结合时增加了容量,改善了储能解决方案.

关键词:
活跃的阴解质是活性的阴解质.所有固态电池都是固态电池.额外的容量额外的容量化是一种化物.固体电解质是一种固体电解质.

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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:

  • 固体电解质 (SE) 对于更安全的电池至关重要,取代易燃液体电解质.
  • 目前的固态电池面临着由于阴极中不活跃的SE添加剂的低能量密度的挑战.
  • 为高性能固态设备开发有助于容量的活跃SE是关键.

研究的目的:

  • 介绍和描述一种新的化物固体电解质Li3VCl6,作为电池中的活性成分.
  • 为了评估Li3VCl6.6的电化学性能和离子导电性.
  • 为了证明Li3VCl6在集成到复合材料阴极中时增强能量密度的潜力.

主要方法:

  • 化物固体电解质Li3VCl6.6.的合成和表征
  • 电化学测试包括循环电量计和静电循环测试,以评估容量和电压.
  • 在电化学循环条件下的离子导电性测量.
  • 使用Li3VCl6与LiFePO4进行性能评估的复合阴极制造.

主要成果:

  • Li3VCl6具有良好的Li+导电性和80mAhg-1的可逆容量,3V与Li+/Li.
  • 由于固体溶液反应机制,Li3VCl6的离子导电性在化/脱过程中保持稳定.
  • 使用活性Li3VCl6的复合阴极实现了217.1 mAh g-1 (LFP基础) 和~50%的能量密度增加.

结论:

  • 3VCl6作为活性化物固体电解质,有助于电池容量.
  • 使用像Li3VCl6这样的活性催解体显著提高了固态电池的能量密度.
  • 这种方法为开发更安全,更高能量密度的电池技术提供了一个有前途的战略.