Repozitorij Univerze v Novi Gorici

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Naslov:Spectroscopic insights into the electrochemical mechanism of rechargeable calcium/sulfur batteries
Avtorji:Scafuri, Antonio (Avtor)
Berthelot, Romain (Avtor)
Pirnat, Klemen (Avtor)
Vižintin, Alen (Avtor)
Bitenc, Jan (Avtor)
Aquilanti, Giuliana (Avtor)
Foix, Dominique (Avtor)
Dedryvère, Rémi (Avtor)
Arčon, Iztok (Avtor)
Dominko, Robert (Avtor)
Stievano, Lorenzo (Avtor)
Datoteke:Gradivo nima datotek. Gradivo je morda fizično dosegljivo v knjižnici fakultete, zalogo lahko preverite v COBISS-u. Povezava se odpre v novem oknu
Jezik:Angleški jezik
Vrsta gradiva:Delo ni kategorizirano (r6)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:UNG - Univerza v Novi Gorici
Opis:Calcium batteries represent a promising alternative to lithium metal systems. The combination of the low redox potential and low cost and the energy-dense calcium anode (2073 mAh/cm3, similar to 2044 mAh/cm3 for Li) with appropriate low-cost cathode materials such as sulfur could produce a game-changing technology in several fields of applications. In this work, we present the reversible activity of a proof-of-concept Ca/S battery at room temperature, characterized by a surprising medium-term cycling stability with low polarization, promoted by the use of a simple positive electrode made of sulfur supported on an activated carbon cloth scaffold, and a state-of-the-art fluorinated alkoxyborate-based electrolyte. Insights into the electrochemical mechanism governing the chemistry of the Ca/S system were obtained for the first time by combining X-ray photoelectron spectroscopy and X-ray absorption spectroscopy. The mechanism implies the formation of different types of soluble polysulfide species during both charge and discharge at room temperature, and the formation of solid CaS at the end of discharge. The reversible electrochemical activity is proven by the reformation of elemental sulfur at the end of the following charge. These promising results open the way to the comprehension of emerging Ca/S systems, which may represent a valid alternative to Mg/S and Li/S batteries.
Ključne besede:Calcium/Sulfur Batteries EXAFS, XANES
Leto izida:13
Št. strani:str. 8266-8275
Številčenje:#no. #19, #Vol. #32
COBISS_ID:32411907 Povezava se odpre v novem oknu
ISSN pri članku:0897-4756
URN:URN:SI:UNG:REP:3DHK8QHO
DOI:10.1021/acs.chemmater.0c02074 Povezava se odpre v novem oknu
Število ogledov:39
Število prenosov:0
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
Področja:Gradivo ni uvrščeno v področja.
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Skupna ocena:(0 glasov)
Vaša ocena:Ocenjevanje je dovoljeno samo prijavljenim uporabnikom.

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Gradivo je del revije

Naslov:Chemistry of materials
Skrajšan naslov:Chem. mater.
Založnik:The Society
ISSN:0897-4756
COBISS.SI-ID:6557189 Novo okno
Leto izida:13

Sekundarni jezik

Jezik:Ni določen
Ključne besede:elektrokemija, baterije, spektroskopija, žveplo


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