Number of the records: 1
Composite cathode for Li-sulfur system: Effect of inorganic additives on electrochemical performance
- 1.
SYSNO ASEP 0564985 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Composite cathode for Li-sulfur system: Effect of inorganic additives on electrochemical performance Author(s) Zukalová, Markéta (UFCH-W) RID, SAI, ORCID
Vinarčíková, Monika (UFCH-W)
Pitňa Lásková, Barbora (UFCH-W) ORCID
Kavan, Ladislav (UFCH-W) RID, ORCIDArticle number 012001 Source Title Journal of Physics: Conference Series, 2315. - Bristol : IOP Publishing, 2022 - ISSN 1742-6588 Number of pages 9 s. Publication form Print - P Action International Conference on Advanced Batteries, Accumulators and Fuel Cells (ABAF 2022) /23./ Event date 21.08.2022 - 24.08.2022 VEvent location Brno Country CZ - Czech Republic Event type WRD Language eng - English Country GB - United Kingdom Keywords Li-sulfur system ; electrochemistry ; TiO2 Subject RIV CG - Electrochemistry OECD category Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis) R&D Projects GA20-03564S GA ČR - Czech Science Foundation (CSF) Institutional support UFCH-W - RVO:61388955 EID SCOPUS 85144061798 DOI 10.1088/1742-6596/2382/1/012001 Annotation 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. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2023
Number of the records: 1