1. Polysulfides formation in different electrolytes from the perspective of X-ray absorption spectroscopyRobert Dominko, Alen Vižintin, Giuliana Aquilanti, Lorenzo Stievano, Maria Joseph Helen, Anji Reddy Munnangi, Maximilian Fichtner, Iztok Arčon, 2018, original scientific article Abstract: Li-S batteries are promising energy storage technology for the future, however there two major problems remained which need to be
solved before successful commercialization. Capacity fading due to polysulfide shuttle and corrosion of lithium metal are directly
connected with the type and quantity of electrolyte used in the cells. Several recent works show dependence of the electrochemical
behavior of Li-S batteries on type of the electrolyte. In this work we compare and discuss a discharge mechanism of sulfur conversion
in three different electrolytes based on measurements with sulfur K-edge XAS. The sulfur conversion mechanism in the ether based
electrolytes, the most studied type of solvents in the Li-S batteries, which are enabling high solubility of polysulfides are compared
with the fluorinated ether based electrolytes with a reduced polysulfide solubility and in carbonate based electrolytes with the sulfur
confined into a ultramicroporous carbon. In all three cases the sulfur reduction proceeds through polysulfide intermediate phases
with a difference on the type polysulfides detected at different steps of discharge. Keywords: Li-S batteries, operando sulphur K-edge XANES, EXAFS, Li-polysulphides Published in RUNG: 01.06.2018; Views: 4244; Downloads: 0 This document has many files! More... |
2. Growth of nanostructured ZnO on wearable fabrics for functional garmentMinseo ParK, Fei Tong, Achintya Sujan, Yoonsung Chung, Minseo Park, Bruce Tatarchuk, Helen Koo, Hosang Ahn, Young Soo Yoon, Dong-Joo Kim, 2014, original scientific article Keywords: ZnO, Fabrics, Dip-pad-cure method, Nanorods, Diffuse reflectance, IV measurement Published in RUNG: 16.01.2017; Views: 5248; Downloads: 0 This document has many files! More... |
3. Surface plasmon resonance properties of DC magnetron sputtered Ag nanoislands on ITO-glass and In2O3-PET substratesFei Tong, Yoonsung Chung, J Goswami, Virginia Davis, Michael Hamilton, Kim Dong-Joo, Helen Koo, Kyeong K. Lee, Minseo Park, 2014, other scientific articles Keywords: Ag nanoislands, Surface plasmon resonance properties, DC magnetron sputtere, ITO-glass and In2O3-PET substrates Published in RUNG: 16.01.2017; Views: 4972; Downloads: 0 This document has many files! More... |