High-performance anion exchange membrane fuel cells and zinc-air batteries enabled by a hierarchically porous hollow Fe/N/C aerogel catalyst

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F25%3A43932170" target="_blank" >RIV/60461373:22310/25:43932170 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.rsc.org/en/content/articlelanding/2025/ta/d4ta08895f" target="_blank" >https://pubs.rsc.org/en/content/articlelanding/2025/ta/d4ta08895f</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d4ta08895f" target="_blank" >10.1039/d4ta08895f</a>

Jazyk výsledku

angličtina

Název v původním jazyce

High-performance anion exchange membrane fuel cells and zinc-air batteries enabled by a hierarchically porous hollow Fe/N/C aerogel catalyst

Popis výsledku v původním jazyce

Currently, the development of Fe/N/C catalysts is attracting more and more attention, due to their exciting potential applications in advanced anion-exchange membrane fuel cells (AEMFCs) and zinc-air batteries (ZABs). Among these, the main hurdle lies in the high mass transport resistance associated with the micropore-dominated Fe/N/C catalysts. In this work, we report the exploration of a carboxymethyl cellulose (CMC)-induced hierarchically porous hollow Fe/N/C aerogel (FeN-CA) catalyst, which remarkably enhances mass transport and improves the AEMFC/ZAB performance. It is witnessed that the resulting aerogel catalyst increases the mesoporous and macroporous structures, thus effectively reducing the oxygen transport resistance within the electrodes at high current densities. Consequently, the resulting FeN-CA catalyst in AEMFCs exhibits a reduced mass transfer overpotential (235 mV) at 1500 mA cm-2 and a peak power density of 774 mW cm-2 at 1724 mA cm-2, respectively. Moreover, in ZABs, it delivers an exceptional peak power density of up to 500 mW gcatalyst-1 (25 degrees C) and 766 mW gcatalyst-1 (80 degrees C), which is the highest among non-precious metal catalysts (NPMCs) ever reported, indicating their future potential in commercial applications.

Název v anglickém jazyce

High-performance anion exchange membrane fuel cells and zinc-air batteries enabled by a hierarchically porous hollow Fe/N/C aerogel catalyst

Popis výsledku anglicky

Currently, the development of Fe/N/C catalysts is attracting more and more attention, due to their exciting potential applications in advanced anion-exchange membrane fuel cells (AEMFCs) and zinc-air batteries (ZABs). Among these, the main hurdle lies in the high mass transport resistance associated with the micropore-dominated Fe/N/C catalysts. In this work, we report the exploration of a carboxymethyl cellulose (CMC)-induced hierarchically porous hollow Fe/N/C aerogel (FeN-CA) catalyst, which remarkably enhances mass transport and improves the AEMFC/ZAB performance. It is witnessed that the resulting aerogel catalyst increases the mesoporous and macroporous structures, thus effectively reducing the oxygen transport resistance within the electrodes at high current densities. Consequently, the resulting FeN-CA catalyst in AEMFCs exhibits a reduced mass transfer overpotential (235 mV) at 1500 mA cm-2 and a peak power density of 774 mW cm-2 at 1724 mA cm-2, respectively. Moreover, in ZABs, it delivers an exceptional peak power density of up to 500 mW gcatalyst-1 (25 degrees C) and 766 mW gcatalyst-1 (80 degrees C), which is the highest among non-precious metal catalysts (NPMCs) ever reported, indicating their future potential in commercial 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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Materials Chemistry A

ISSN

2050-7488

e-ISSN

2050-7496

Svazek periodika

13

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

8035-8043

Kód UT WoS článku

001426277300001

EID výsledku v databázi Scopus

2-s2.0-86000783992