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Composite cathode for Li-sulfur system: Effect of inorganic additives on electrochemical performance
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SYSNO ASEP 0564985 Druh ASEP C - Konferenční příspěvek (mezinárodní konf.) Zařazení RIV D - Článek ve sborníku Název Composite cathode for Li-sulfur system: Effect of inorganic additives on electrochemical performance Tvůrce(i) Zukalová, Markéta (UFCH-W) RID, SAI, ORCID
Vinarčíková, Monika (UFCH-W)
Pitňa Lásková, Barbora (UFCH-W) ORCID
Kavan, Ladislav (UFCH-W) RID, ORCIDČíslo článku 012001 Zdroj.dok. Journal of Physics: Conference Series, 2315. - Bristol : IOP Publishing, 2022 - ISSN 1742-6588 Poč.str. 9 s. Forma vydání Tištěná - P Akce International Conference on Advanced Batteries, Accumulators and Fuel Cells (ABAF 2022) /23./ Datum konání 21.08.2022 - 24.08.2022 Místo konání Brno Země CZ - Česká republika Typ akce WRD Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova Li-sulfur system ; electrochemistry ; TiO2 Vědní obor RIV CG - Elektrochemie Obor OECD Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis) CEP GA20-03564S GA ČR - Grantová agentura ČR Institucionální podpora UFCH-W - RVO:61388955 EID SCOPUS 85144061798 DOI 10.1088/1742-6596/2382/1/012001 Anotace The influence of five different inorganic additives with different composition and morphology, viz. nanofibrous rutile/TiOxNy, Li4Ti5O12 (LTS) from Altair, TiO2-P90 from Evonik, TiOxNy-anatase and nano-TiO2 on the electrochemical performance of the activated carbon/sulfur composite cathode is evaluated by cyclic voltammetry at the scan rate of 0.1 mV s-1 and by galvanostatic chronopotentiometry at the 0.1 C rate. The composites are prepared by facile mechanical mixing of activated carbon with the inorganic additive and subsequent melting-diffusion with sulfur. The addition of nano-TiO2 from titanium isopropoxide, TiOxNy-anatase, rutile/TiOxNy, and LTS Altair to the carbon/sulfur composite cathode increased the charge capacity of the corresponding Li-sulfur cell. The negative effect of the P90 additive can be attributed to the blocking of its surface by Al2O3 and SiO2, hindering the adsorption of polysulfides. TiOxNy-anatase additive exhibits the highest capacity improvement due to its surface-enhanced redox chemistry of conductive and sulphiphilic surface resulting in a 7 % increase of the voltammetric charge capacity. In addition, this additive has a beneficial effect on the cycling stability of the sulfur composite cathode during galvanostatic cycling. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2023
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