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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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Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
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The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
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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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EDTA titrations may necessitate masking and demasking agents to temporarily protect a particular metal ion in a mixture from the EDTA reaction. These agents facilitate the sequential analysis of the metal ions by forming stable complexes with some—but not all—metal ions during certain steps.
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用烯胺电解质添加剂调节溶解用于可逆 Zn 阳极.

Hengshuo Liu1, Yongxin Sun2, Yutian Yang1

  • 1School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China.

ACS applied materials & interfaces
|August 19, 2024
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概括

烯胺添加剂通过防止树的生长和副作用来稳定水性离子电池. 这提高了电池的寿命和性能,推进了储能解决方案.

关键词:
添加剂 添加剂 添加剂水性离子电池水性离子电池树突 (dendrites) 是一种树突.副作用的反应 副作用的反应溶解结构是一个溶解结构.

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科学领域:

  • 电化学 电化学 电化学
  • 材料科学 材料科学 材料科学
  • 储能 储能 储能 储能 储能 储能

背景情况:

  • 水性离子电池 (ZIB) 是有前途的,因为的高容量和低成本.
  • 金属阳极遭受了树的生长和与水的副作用反应,限制了电池的稳定性.
  • 开发稳定的阳极对于实际的ZIB应用至关重要.

研究的目的:

  • 为了提高ZIB中的金属阳极的稳定性和性能.
  • 为了减轻有害的副作用和在水性电解质中形成的树.
  • 探索使用烯胺作为ZIB电解质的稳定添加剂.

主要方法:

  • 用烯胺 (AM) 添加剂进行电解质修饰.
  • 对 Zn//Zn 对称和 Zn//VO2 充满电池的电化学性能测试.
  • 使用实验数据和理论模拟进行分析,以了解反应机制.

主要成果:

  • 烯胺重建Zn2+溶解,减少活性水分子和H2O分解.
  • Zn//Zn对称电池在1 mA cm-2.2时表现出超过2000小时的稳定性.
  • 充满Zn//VO2的电池显示了更好的循环性能和高的初始放电容量.

结论:

  • 烯胺添加剂有效地抑制了阳极上的寄生反应和树生长.
  • 通过AM整合优化电解质可显著提高ZIB的长期稳定性和性能.
  • 这一战略为开发先进的水性离子电池提供了宝贵的见解.