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関連する概念動画

Standard Electrode Potentials03:02

Standard Electrode Potentials

45.0K
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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Electrodeposition01:08

Electrodeposition

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Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
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Ion Exchange01:17

Ion Exchange

658
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...
658
EDTA: Auxiliary Complexing Reagents01:26

EDTA: Auxiliary Complexing Reagents

669
EDTA titrations are usually carried out in highly basic conditions, where the fully deprotonated form of EDTA, Y4−, actively complexes with the free metal ions in the solution. Several metal ions precipitate as hydrous oxide (hydroxides, oxides, or oxyhydroxides) under these conditions, lowering the concentration of free metal ions in the solution. For this reason, auxiliary complexing agents or ligands such as ammonia, tartrate, citrate, or triethanolamine are used in EDTA titrations to...
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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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Voltaic/Galvanic Cells02:47

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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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バイ機能の電解質添加物 変形亜鉛アノドとキャソード

Yu-Hang Liu1, Yang Yu1, Yu Zhang1

  • 1School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, P. R. China.

The journal of physical chemistry letters
|August 22, 2025
PubMed
まとめ

この研究では,水性亜鉛イオン電池のための新しい電解質添加物混合物を導入し,アノドの安定性とカトドの耐久性を高めます. 二機能添加物は,バッテリーの性能とサイクル寿命を大幅に改善します.

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科学分野:

  • 電気化学
  • 材料科学
  • エネルギー貯蔵

背景:

  • 水性亜鉛イオン電池は安全で持続可能ですが,アノドとカトドの分解が困難です.
  • 水素の進化と腐食は亜鉛アノドの性能を制限する.
  • バッテリーの寿命には不可欠です.

研究 の 目的:

  • 水性亜鉛イオン電池のための新しい電解質添加物混合物を調査する.
  • 亜鉛アノドの安定性を高め,カトドの水解を緩和する.
  • 亜鉛イオン電池の全体的な性能とサイクル寿命を向上させるため

主な方法:

  • ZnSO4,Zn(OTf) 2,NH4を含む混合電解質を使用した.
  • 結合された二機能添加物 (Zn(OTf) 2とNH4Cl) が保護性固体-電解質インターフェーズ (SEI) を形成する.
  • NH4V4O10キャソードと亜鉛アノードでテストされた対称性およびフルセルバッテリー.

主要な成果:

  • 添加物混合物は,ZnF2とZn3N2を含む安定したSEI層の形成を容易にした.
  • NH4V4O10カトドの水解が効果的に緩和されました.
  • シンメトリック電池は,低 (1 mA cm-2で900 h) および高 (570 mA cm-2で5 h) の電流密度で長期的な安定性を示した.
  • 完全な細胞は,1 A g-1で2000サイクルで99.99%のクーロンビック効率を達成しました.

結論:

  • この二機能添加物混合物は,水性亜鉛イオン電池の性能と安定性を著しく高めています.
  • このアプローチは先端の亜鉛イオン電池技術の 実践的な応用のための有望な経路を提供します.
  • 開発された電解質システムは,亜鉛イオン電池の劣化における主要な課題に取り組んでいます.