English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Insights into the sodiation mechanism of hard carbon-like materials from electrochemical impedance spectroscopy

Schutjajew, K., Tichter, T., Schneider, J., Antonietti, M., Roth, C., & Oschatz, M. (2021). Insights into the sodiation mechanism of hard carbon-like materials from electrochemical impedance spectroscopy. Physical Chemistry Chemical Physics, 23(19), 11488-11500. doi:10.1039/D1CP00610J.

Item is

Basic

show hide
Genre: Journal Article

Files

show Files
hide Files
:
Article.pdf (Publisher version), 4MB
Name:
Article.pdf
Description:
-
Visibility:
Public
MIME-Type / Checksum:
application/pdf / [MD5]
Technical Metadata:
Copyright Date:
-
Copyright Info:
-

Locators

show

Creators

show
hide
 Creators:
Schutjajew, Konstantin1, Author              
Tichter, Tim, Author
Schneider, Jonathan, Author
Antonietti, Markus2, Author              
Roth, Christina, Author
Oschatz, Martin1, Author              
Affiliations:
1Martin Oschatz, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2364733              
2Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863321              

Content

show
hide
Free keywords: -
 Abstract: To render the sodium ion battery (SIB) competitive among other technologies, the processes behind sodium storage in hard carbon anodes must be understood. For this purpose, electrochemical impedance spectroscopy (EIS) is usually undervalued, since fitting the spectra with equivalent circuit models requires an a-priori knowledge about the system at hand. The analysis of the distribution of relaxation times (DRT) is an alternative, which refrains from fitting arbitrarily nested equivalent circuits. In this paper, the sodiation and desodiation of a hard carbon anode is studied by EIS at different states of charge (SOC). By reconstructing the DRT function, highly resolved information on the number and relative contribution of individual electrochemical processes is derived. During the sloping part of the sodiation curve, mass transport is found to be the most dominant source of resistance but rapidly diminishes when the plateau phase is reached. An equivalent circuit model, qualitatively reproducing the experimental data of the sloping region was built upon the DRT results, which is particularly useful for future EIS studies on hard carbon SIB anodes. More importantly, this work contributes to establish EIS as a practical tool to directly study electrode processes without the bias of a previously assumed model.

Details

show
hide
Language(s): eng - English
 Dates: 2021-04-292021
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1039/D1CP00610J
BibTex Citekey: D1CP00610J
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Physical Chemistry Chemical Physics
  Abbreviation : Phys. Chem. Chem. Phys.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Cambridge, England : Royal Society of Chemistry
Pages: - Volume / Issue: 23 (19) Sequence Number: - Start / End Page: 11488 - 11500 Identifier: ISSN: 1463-9076