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Related Concept Videos

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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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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EDTA: Auxiliary Complexing Reagents01:26

EDTA: Auxiliary Complexing Reagents

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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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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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Ionic Strength: Effects on Chemical Equilibria01:19

Ionic Strength: Effects on Chemical Equilibria

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The addition of an inert ionic compound increases the solubility of a sparingly soluble salt. For example, adding potassium nitrate to a saturated solution of calcium sulfate significantly enhances the solubility of calcium sulfate. Le Châtelier's principle cannot predict this shift in the equilibrium. Instead, this could be explained in terms of changes in the effective concentration of the ions in solution in the presence of added inert salt.
In this solution, the primary...
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Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

376
In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
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Zinc-Sponge Battery Electrodes that Suppress Dendrites
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Electrolyte Additives for Stable Zn Anodes.

Shengchi Bai1, Zhaodong Huang2, Guojin Liang2

  • 1Research Institute of Petroleum Exploration & Development of China National Petroleum Corporation (RIPED), Beijing, 100083, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|November 27, 2023
PubMed
Summary
This summary is machine-generated.

Zinc-ion batteries offer a safe and affordable solution for large-scale energy storage. Electrolyte additives are key to overcoming challenges like dendrite growth and corrosion in aqueous zinc-ion batteries.

Keywords:
Zn anodesaqueous Zn-ion batterieselectrolyte additiveselectrolytes

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Zinc-ion batteries (ZIBs) are promising for large-scale energy storage due to cost, safety, and environmental benefits.
  • Aqueous electrolytes in ZIBs face challenges like poor reversibility and Zn anode degradation (dendrite growth, corrosion).

Purpose of the Study:

  • To provide a comprehensive review of challenges and protection strategies for Zn anodes in aqueous ZIBs.
  • To elucidate the fundamental mechanisms of electrolyte additives in protecting the Zn anode.

Main Methods:

  • Literature review focusing on Zn anode protection strategies.
  • Analysis of electrolyte additive functions: electrostatic shielding, adsorption, in situ SEI formation, water stability enhancement, and surface texture regulation.

Main Results:

  • Electrolyte additives effectively mitigate Zn anode issues like dendrite formation and corrosion.
  • Additives function through diverse mechanisms to improve Zn anode performance and stability.

Conclusions:

  • Electrolyte additives are crucial for advancing aqueous ZIB technology.
  • Future research should explore novel electrolyte additives for enhanced Zn anode protection and long-term stability.