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Related Concept Videos

Electrodeposition01:08

Electrodeposition

664
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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Voltammetry: Stripping Methods01:13

Voltammetry: Stripping Methods

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Anodic Stripping Voltammetry (ASV), Cathodic Stripping Voltammetry (CSV), and Adsorptive Stripping Voltammetry (AdSV) are electrochemical techniques used to determine trace amounts of analytes in solution. These methods involve applying a potential to an electrode and measuring the resulting current.
Anodic Stripping Voltammetry (ASV)
ASV is used to determine metals and metalloids at trace levels. It involves two steps: deposition and stripping. First, a negative potential is applied to the...
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Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

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Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
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Electrochemically and Bioelectrochemically Induced Ammonium Recovery
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Reversible Na Plating/Stripping with High Areal Capacity Using an Electroconductive Liquid Electrolyte System.

Youngjae Jung1, Seyoung Lee1, Dowan Kim1

  • 1School of Energy & Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan 44919, Republic of Korea.

ACS Applied Materials & Interfaces
|September 6, 2023
PubMed
Summary
This summary is machine-generated.

Anode-free sodium-metal batteries achieve high stability using a novel electroconductive electrolyte system. This system enhances sodium plating and stripping, enabling efficient energy storage in seawater batteries.

Keywords:
batterieselectrolyteselectronic conductivitymetalsredox-active

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Anode-free sodium-metal batteries (AFSMBS) offer high energy density and safety but suffer from poor cycling stability due to unstable solid electrolyte interphase (SEI) formation and dead sodium.
  • Challenges include dendrite growth and electrolyte decomposition during sodium plating and stripping, especially at high areal capacities.

Purpose of the Study:

  • To develop an electroconductive electrolyte system to improve the cycling stability and Coulombic efficiency of anode-free sodium-metal batteries.
  • To investigate the mechanisms of electron transfer and dead sodium utilization in the proposed electrolyte system.

Main Methods:

  • Proposed an electroconductive electrolyte system combining a liquid electrolyte with electron-accepting properties and a NASICON solid electrolyte with low electronic conductivity.
  • Demonstrated the system's functionality in a seawater battery (SWB) with an infinite sodium source.

Main Results:

  • Achieved high Coulombic efficiency (≥99.9%) for over 60 cycles at a high areal capacity (∼24 mAh/cm2) in anode-free SWB cells.
  • The electroconductive liquid electrolyte suppressed irreversible electron transfer and electrolyte decomposition, while also enabling the reutilization of dead sodium.

Conclusions:

  • The proposed electroconductive electrolyte system significantly enhances the reversibility of sodium plating and stripping in anode-free systems.
  • This strategy offers a promising pathway for developing stable and high-performance sodium-metal batteries, particularly in conjunction with solid electrolytes.