Fast screening of carbon-based nanostructured materials as potential electrode materials for vanadium redox flow battery

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F22%3A43965977" target="_blank" >RIV/49777513:23640/22:43965977 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22340/22:43925225

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0013468622012002?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0013468622012002?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.electacta.2022.141043" target="_blank" >10.1016/j.electacta.2022.141043</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Fast screening of carbon-based nanostructured materials as potential electrode materials for vanadium redox flow battery

Popis výsledku v původním jazyce

Carbon-based nanostructured materials possess good electrochemical activity toward vanadium species employed in vanadium redox flow batteries (VRFB). However, fast screening and testing their electrochemical activity are challenging due to unreliable methods, depositing the nanomaterials onto solid current collectors. We show that creating a nanomaterial fixed bed on a planar current collector in a specifically designed electrochemical cell overcomes these problems. The fixed bed preserves the nanomaterial intrinsic large interfacial area, which reflects in the electric currents reaching up to two orders higher values when compared to flat electrodes. Using the concept of the fixed bed, we screened selected carbon-based materials for their electrochemical activity in a working solution of vanadium. Cyclic voltammograms measured on various carbon nanotubes and fibers of thermally treated graphite felt possessed the well-defined peaks pertinent to vanadium electrochemical reactions. Surprisingly, nickel-doped carbon nanotubes, similarly to fibers of pristine graphite felt or graphene, failed to produce such peaks, rendering them unusable for VRFB. Our screening method can be modified to characterize and test carbon materials for other electrochemical applications.

Název v anglickém jazyce

Fast screening of carbon-based nanostructured materials as potential electrode materials for vanadium redox flow battery

Popis výsledku anglicky

Carbon-based nanostructured materials possess good electrochemical activity toward vanadium species employed in vanadium redox flow batteries (VRFB). However, fast screening and testing their electrochemical activity are challenging due to unreliable methods, depositing the nanomaterials onto solid current collectors. We show that creating a nanomaterial fixed bed on a planar current collector in a specifically designed electrochemical cell overcomes these problems. The fixed bed preserves the nanomaterial intrinsic large interfacial area, which reflects in the electric currents reaching up to two orders higher values when compared to flat electrodes. Using the concept of the fixed bed, we screened selected carbon-based materials for their electrochemical activity in a working solution of vanadium. Cyclic voltammograms measured on various carbon nanotubes and fibers of thermally treated graphite felt possessed the well-defined peaks pertinent to vanadium electrochemical reactions. Surprisingly, nickel-doped carbon nanotubes, similarly to fibers of pristine graphite felt or graphene, failed to produce such peaks, rendering them unusable for VRFB. Our screening method can be modified to characterize and test carbon materials for other electrochemical applications.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

<a href="/cs/project/EF16_025%2F0007445" target="_blank" >EF16_025/0007445: Baterie na bázi organických redoxních látek pro energetiku tradičních i obnovitelných zdrojů.</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

ELECTROCHIMICA ACTA

ISSN

0013-4686

e-ISSN

1873-3859

Svazek periodika

430

Číslo periodika v rámci svazku

OCT 20 2022

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

nestrankovano

Kód UT WoS článku

000863286200002

EID výsledku v databázi Scopus

2-s2.0-85138441463