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Related Concept Videos

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: 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...
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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...
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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.
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Precipitation Titration: Endpoint Detection Methods01:19

Precipitation Titration: Endpoint Detection Methods

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In argentometric precipitation titrations, endpoints can be detected visually by the Mohr, Volhard, and Fajans methods. In the Mohr method, adding a soluble chromate indicator gives an initial yellow color to the analyte solution. As the titrant is added, the first excess of silver ions forms a red silver chromate precipitate, marking the endpoint. The solution pH should be maintained at about 8 by adding solid CaCO3.
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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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Updated: Mar 27, 2026

Screening of Coatings for an All-Solid-State Battery Using In Situ Transmission Electron Microscopy
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Screening additive for stable solid electrolyte interphase in polymer lithium battery by coulometric titration time

Pengfei Zhai1, Yu Zhan2, Zidan Cao1

  • 1School of Energy Science and Technology, Henan University, Zhengzhou 450046, PR China.

Journal of Colloid and Interface Science
|March 26, 2026
PubMed
Summary

Lithium difluoro(oxalato)borate (LiDFOB) additive significantly enhances solid electrolyte interphase (SEI) stability in polymer lithium metal batteries. Coulometric titration time analysis (CTTA) proves effective for screening additives, enabling longer battery life.

Keywords:
Coulometric titration time analysisElectrolyte additivesLithium difluoro(oxalato)borateSolid electrolyte interphaseSolid-state polymer lithium metal batteries

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Battery Technology

Background:

  • Solid electrolyte interphase (SEI) stability is crucial for solid-state polymer lithium metal battery performance.
  • Characterizing the temporal evolution of SEI remains a significant challenge.
  • Electrolyte additives can improve SEI quality but require effective evaluation methods.

Purpose of the Study:

  • To evaluate the long-term stability of SEI in poly(ethylene oxide) (PEO)-based solid polymer electrolytes (SPEs) using various additives.
  • To demonstrate the efficacy of coulometric titration time analysis (CTTA) for screening SEI-stabilizing additives.
  • To identify optimal additives for enhancing the performance and lifespan of polymer-based solid-state batteries.

Main Methods:

  • Utilized coulometric titration time analysis (CTTA), a sensitive electrochemical technique.
  • Systematically screened a range of additives including ion-conductive fillers, inert fillers, plasticizers, and lithium salts.
  • Investigated the effects of lithium difluoro(oxalato)borate (LiDFOB) on SEI formation and stability in PEO-based SPEs.

Main Results:

  • LiDFOB preferentially decomposes at the lithium anode, forming a thin, inorganic-rich passivation SEI layer.
  • This LiDFOB-induced SEI layer mitigates the degradation of both PEO and Lithium bis(trifluoromethanesulphonyl)imide (LiTFSI).
  • Incorporation of LiDFOB extended the lithium consumption time by approximately 14-fold, indicating suppressed interfacial side reactions.

Conclusions:

  • CTTA is a powerful diagnostic tool for screening interfacial-stabilizing additives for solid-state batteries.
  • LiDFOB is a highly effective additive for enhancing SEI stability and battery performance.
  • The study provides guidelines for designing long-life polymer-based solid-state batteries.