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Related Concept Videos

Electrogravimetric Analysis: Overview01:30

Electrogravimetric Analysis: Overview

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Electrogravimetric analysis measures the weight of an analyte deposited electrolytically onto a suitable working electrode. This method involves applying a potential to a pre-weighed electrode submerged in a solution, which results in the desired substance being deposited through reduction at the cathode or oxidation at the anode. The electrode's weight is recorded after deposition, and the difference in weight gives the analyte's weight in the solution.
To test the completeness of the...
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Electrodeposition01:08

Electrodeposition

771
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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Non-aqueous Electrode Processing and Construction of Lithium-ion Coin Cells
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Viscosity Analysis of Battery Electrode Slurry.

Alex Cushing1,2, Tianyue Zheng1, Kenneth Higa1

  • 1Energy Storage and Distributed Resources Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.

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|November 27, 2021
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Electrode slurry viscosity is influenced by component ratios and mixing. Carboxymethyl cellulose (CMC) significantly increases viscosity, while microstructure stabilization requires longer mixing than suspension stabilization.

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Electrochemistry

Background:

  • Electrode slurry properties are critical for battery performance.
  • Understanding component interactions is key to optimizing slurry formulation.
  • Viscosity and microstructure affect slurry processability and final electrode quality.

Purpose of the Study:

  • To investigate the impact of component ratios and mixing time on electrode slurry viscosity.
  • To analyze the relationship between mixing duration and slurry microstructure stabilization.
  • To determine the relative influence of graphite, carbon black, and carboxymethyl cellulose (CMC) on slurry viscosity.

Main Methods:

  • Systematic variation of active material (graphite), conductive material (carbon black), and polymer binder (CMC) content.
  • Rheological measurements to assess slurry viscosity and shear-thinning behavior.
  • Microscopic analysis to evaluate the internal structure and stability of the slurries.

Main Results:

  • Electrode slurries exhibited shear-thinning behavior.
  • Suspension properties stabilized within a short mixing duration.
  • Microstructural stabilization was not achieved within the same mixing time.
  • Increased carboxymethyl cellulose (CMC) content resulted in the most significant viscosity increase.

Conclusions:

  • Component ratios and mixing time critically affect electrode slurry rheology and microstructure.
  • CMC content is a primary driver of viscosity increase in these slurries.
  • Optimizing mixing protocols is essential for achieving stable electrode microstructures for improved battery performance.