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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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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.
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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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In Situ Constructing Robust Solid-Electrolyte Interphase for Advanced Zn Anode in Acidic Electrolyte.

Yihua Xie1, Xing Zhou1, Yiming Guo2

  • 1Department of Chemistry and Institute of New Energy, Fudan University, Shanghai, 200433, China.

Small (Weinheim an Der Bergstrasse, Germany)
|September 12, 2025
PubMed
Summary
This summary is machine-generated.

A novel organic/inorganic solid-electrolyte interphase (SEI) effectively suppresses dendrites in acidic aqueous Zn-ion batteries (AZIBs). This protective layer enables stable zinc anode cycling and enhances battery performance.

Keywords:
Zn anodeacidic electrolyteaqueous Zn‐Ion batteryelectric double layerin situ SEI

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Energy Storage

Background:

  • Acidic electrolytes (pH<4) inhibit Zn anode dendrites but cause hydrogen evolution and corrosion.
  • Developing a protective solid-electrolyte interphase (SEI) is crucial for acidic aqueous Zn-ion batteries (AZIBs).

Purpose of the Study:

  • To construct a robust organic/inorganic layered SEI on the Zn anode for acidic AZIBs.
  • To improve the stability and performance of AZIBs by addressing interface issues.

Main Methods:

  • In situ construction of SEI via tetraethylammonium tetrafluoroborate (TEATFB) decomposition.
  • Utilizing BF4--triggered hydrolysis chemistry for SEI formation.
  • Characterization of SEI structure and electrochemical performance.

Main Results:

  • The SEI features an inner ZnF2 layer for Zn2+ migration and an outer organic layer for volume accommodation.
  • Preferential adsorption of TEA+ cations forms a hydrophobic EDL, inducing uniform Zn deposition and water exclusion.
  • Achieved 99.9% average Coulombic efficiency (ACE) in Zn||Cu cells and 3000 h cycle life in Zn||Zn cells.
  • Zn||MnO2 full cells demonstrated 82% capacity retention after 500 cycles.

Conclusions:

  • The constructed SEI effectively protects the Zn anode in acidic electrolytes.
  • The SEI promotes uniform Zn deposition and enhances ion transport, leading to superior battery performance.
  • This strategy offers a promising pathway for developing high-performance acidic AZIBs.