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Related Concept Videos

Coulometry: Overview01:00

Coulometry: Overview

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Coulometry is one of the rapid, most accurate, and precise analytical techniques that determine the quantity of an analyte by measuring the electrical charge needed for its complete electrolysis without using any analytical standards. The total charge passed during electrolysis correlates with the analyte amount by Faraday's laws of electrolysis. For accurate coulometric measurements, a charge equal to Faraday's constant multiplied by the number of electrons involved in the relevant...
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Controlled-Potential Coulometry: Electrolytic Methods01:17

Controlled-Potential Coulometry: Electrolytic Methods

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Controlled-potential coulometry, also known as potentiostatic coulometry, employs a three-electrode system in which the working electrode's potential is precisely regulated using a potentiostat. Platinum working electrodes are utilized for positive potentials, while mercury pool electrodes are favored for extremely negative potentials. The platinum counter electrode is separated from the analyte using a membrane or salt bridge to avoid interference in the analysis.
The chosen potential...
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Controlled-Current Coulometry: Coulometric Titration01:18

Controlled-Current Coulometry: Coulometric Titration

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Coulometric titrations are a form of titrimetric analysis where the reagent is generated electrically, and its amount is evaluated based on current and generating time. The electron serves as the standard reagent. The procedure is similar to conventional titrations, such as endpoint detection.
The fundamental requirements for coulometric titrations are (1) 100% efficiency in the reagent-generating electrode reaction and (2) a stoichiometric and preferably rapid reaction between the generated...
602
Controlled-Current Coulometry: Overview01:27

Controlled-Current Coulometry: Overview

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Controlled current coulometry, also known as amperostatic coulometry, is a technique used in electrochemical analysis to measure the quantity of a substance through the controlled passage of current. It involves the application of a constant current to an electrochemical cell containing the analyte of interest. As the current flows through the cell, the analyte undergoes a redox reaction at the electrode surface, resulting in a charge transfer. By monitoring the time required for a certain...
746
Voltammetry: Factors Affecting Measurements01:21

Voltammetry: Factors Affecting Measurements

622
A current produced due to the redox reactions of the analyte at the working and auxiliary electrodes is called a faradaic current. The reaction can be divided into two types. The current generated due to the reduction of the analyte is called cathodic current, and it carries a positive charge. In contrast, the current produced by analyte oxidation is known as an anodic current, and it has a negative charge. The applied potential at the working electrode determines the faradaic current flow, and...
622
Voltammetry: Stripping Methods01:13

Voltammetry: Stripping Methods

1.1K
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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Quantifying static capacity losses in solid-state battery composites via coulometric titration comparison.

Kilian Vettori1, Maximilian Kissel1, Daniel Wagner1

  • 1Institute of Physical Chemistry & Center for Materials Research (ZfM/LaMa), Justus-Liebig-University Giessen, Heinrich-Buff-Ring 17, 35392, Giessen, Germany. kilian.vettori@uni-giessen.de.

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Summary

This study introduces an electrochemical method to measure static cathode active material (CAM) utilization in solid-state batteries. Comparing results with X-ray diffraction validates this new in situ technique for battery material analysis.

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Solid-State Batteries

Background:

  • Accurate quantification of electrochemically active mass is crucial for solid-state battery performance.
  • Existing ex situ methods for assessing cathode active material (CAM) utilization can be time-consuming and may not reflect in situ conditions.
  • Developing reliable in situ techniques is essential for optimizing composite cathode design.

Purpose of the Study:

  • To present a novel electrochemical method for quantifying static cathode active material (CAM) utilization.
  • To determine the fraction of electrochemically active mass within solid-state battery composite cathodes.
  • To compare the efficacy of the proposed in situ method against established ex situ techniques.

Main Methods:

  • Electrochemical quantification using coulometric titration curves.
  • Comparison of CAM behavior in cells with both solid and liquid electrolytes.
  • Contrast of results with ex situ analysis employing X-ray diffraction.

Main Results:

  • The electrochemical method successfully quantifies static CAM utilization in situ.
  • Coulometric titration curves provide a reliable measure of active material fraction.
  • Results obtained via the electrochemical method show good agreement with ex situ X-ray diffraction analysis.

Conclusions:

  • The developed electrochemical approach offers a viable alternative for in situ CAM utilization assessment.
  • This method enhances the understanding of cathode material behavior in solid-state batteries.
  • The technique facilitates more accurate characterization and optimization of battery components.