Ultra-low energy processing of graphite: A fast-track journey towards carbon neutrality

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F22%3A10450605" target="_blank" >RIV/00216208:11310/22:10450605 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=CpygidcVk7" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=CpygidcVk7</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apmt.2022.101594" target="_blank" >10.1016/j.apmt.2022.101594</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Ultra-low energy processing of graphite: A fast-track journey towards carbon neutrality

Popis výsledku v původním jazyce

Graphite is a fascinating material with unique properties, thus making it irreplaceable for a wide range of applications. However, its current processing route is highly energy demanding as it requires dwelling for several hours at high temperatures (2500-3000 °C). We report on the near full consolidation (relative density greater than 95%) at room temperature of graphite flakes under a mild uniaxial or isostatic pressure (100-500 MPa). The application of an external pressure promoted the formation of van der Walls bonds between the flakes, and the consolidation (pore removal) was mostly achieved by interplanar slipping. Despite the room temperature processing, with embodied energy below 1 MJ/kg, the resulting compact had in plane electrical and thermal conductivities as high as 0.77x10(6) S/m and 620 W/m.K (exceeding commercial isotropic graphite approximate to 0.09x10(6) S/m and 120 W/m.K). The bulks were thermally stable up to 1800 °C. Because of the reversible nature on the van der Walls bonding, the cold pressed pellets were fully recyclable (i.e., easily milled and re-shaped) with a mild degradation of the electrical conductivity from 0.77 to 0.19x10(6) S/m after ten cycles.

Název v anglickém jazyce

Ultra-low energy processing of graphite: A fast-track journey towards carbon neutrality

Popis výsledku anglicky

Graphite is a fascinating material with unique properties, thus making it irreplaceable for a wide range of applications. However, its current processing route is highly energy demanding as it requires dwelling for several hours at high temperatures (2500-3000 °C). We report on the near full consolidation (relative density greater than 95%) at room temperature of graphite flakes under a mild uniaxial or isostatic pressure (100-500 MPa). The application of an external pressure promoted the formation of van der Walls bonds between the flakes, and the consolidation (pore removal) was mostly achieved by interplanar slipping. Despite the room temperature processing, with embodied energy below 1 MJ/kg, the resulting compact had in plane electrical and thermal conductivities as high as 0.77x10(6) S/m and 620 W/m.K (exceeding commercial isotropic graphite approximate to 0.09x10(6) S/m and 120 W/m.K). The bulks were thermally stable up to 1800 °C. Because of the reversible nature on the van der Walls bonding, the cold pressed pellets were fully recyclable (i.e., easily milled and re-shaped) with a mild degradation of the electrical conductivity from 0.77 to 0.19x10(6) S/m after ten cycles.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

—

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

Applied Materials Today [online]

ISSN

2352-9407

e-ISSN

2352-9407

Svazek periodika

29

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

101594

Kód UT WoS článku

000880657300001

EID výsledku v databázi Scopus

2-s2.0-85135314864