Spray deposition of sulfonated cellulose nanofibers as electrolyte membranes in fuel cells

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F21%3A10440167" target="_blank" >RIV/00216208:11320/21:10440167 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=FS_58MnJ85" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=FS_58MnJ85</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10570-020-03593-w" target="_blank" >10.1007/s10570-020-03593-w</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Spray deposition of sulfonated cellulose nanofibers as electrolyte membranes in fuel cells

Popis výsledku v původním jazyce

Nanocellulose is a promising new membrane material for fuel cells, with much lower cost and environmental impact compared with Nafion or Aquivion. It is mechanically strong, is an excellent hydrogen barrier and has reasonable proton conductivity. Here, sulfonation of cellulose nanofibers is performed to enhance the conductivity (up to 2 x 10(- 3) S cm(- 1)) without compromising the membrane integrity, and fuel cells are fabricated with 30 mu m-thick &quot;paper&quot; membranes. The hydrogen crossover current is two orders of magnitude lower than for Nafion fuel cells with equivalent thickness, but the power density is rather low. Spray-coating is used to deposit 8 mu m-thick membranes directly onto the electrocatalyst layer, in a process analogous to 3D printing or additive manufacturing. The resulting paper fuel cell has high current density (&gt; 0.8 A cm(- 2)) and power density (156 mW cm(- 2)) under standard measurement conditions (H-2/air; 80 degrees C; 95% RH; 0.1 MPa), attributed to decreased membrane resistance. The cost of the spray-painted cellulose membranes is calculated to be similar to 50 $ m(- 2), which is much lower than that of Nafion, even without taking into consideration economies of scale. This new concept in electrochemical energy conversion paves the way for the mass production of affordable, recyclable fuel cells.

Název v anglickém jazyce

Spray deposition of sulfonated cellulose nanofibers as electrolyte membranes in fuel cells

Popis výsledku anglicky

Nanocellulose is a promising new membrane material for fuel cells, with much lower cost and environmental impact compared with Nafion or Aquivion. It is mechanically strong, is an excellent hydrogen barrier and has reasonable proton conductivity. Here, sulfonation of cellulose nanofibers is performed to enhance the conductivity (up to 2 x 10(- 3) S cm(- 1)) without compromising the membrane integrity, and fuel cells are fabricated with 30 mu m-thick &quot;paper&quot; membranes. The hydrogen crossover current is two orders of magnitude lower than for Nafion fuel cells with equivalent thickness, but the power density is rather low. Spray-coating is used to deposit 8 mu m-thick membranes directly onto the electrocatalyst layer, in a process analogous to 3D printing or additive manufacturing. The resulting paper fuel cell has high current density (&gt; 0.8 A cm(- 2)) and power density (156 mW cm(- 2)) under standard measurement conditions (H-2/air; 80 degrees C; 95% RH; 0.1 MPa), attributed to decreased membrane resistance. The cost of the spray-painted cellulose membranes is calculated to be similar to 50 $ m(- 2), which is much lower than that of Nafion, even without taking into consideration economies of scale. This new concept in electrochemical energy conversion paves the way for the mass production of affordable, recyclable fuel cells.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/LM2018116" target="_blank" >LM2018116: Laboratoř fyziky povrchů - Optická dráha pro výzkum materiálů</a><br>

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Cellulose

ISSN

0969-0239

e-ISSN

—

Svazek periodika

28

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

13

Strana od-do

1355-1367

Kód UT WoS článku

000604488100004

EID výsledku v databázi Scopus

2-s2.0-85098630001