Time Transient Electrochemical Monitoring of Tetraalkylammonium Polybromide Solid Particle Formation: Observation of Ionic Liquid-to-Solid Transitions
- Title
- Time Transient Electrochemical Monitoring of Tetraalkylammonium Polybromide Solid Particle Formation: Observation of Ionic Liquid-to-Solid Transitions
- Author
- 이상욱
- Keywords
- BROMINE COMPLEXING AGENTS; DROPLET COLLISIONS; ELECTROPHORETIC MIGRATION; EMULSION DROPLET; SINGLE; ADSORPTION; DESIGN; CAPACITORS; LIPOSOMES
- Issue Date
- 2019-05
- Publisher
- AMER CHEMICAL SOC
- Citation
- ANALYTICAL CHEMISTRY, v. 91, NO 9, Page. 5850-5857
- Abstract
- Energy storage systems (ESSs) using a Br-/Br-2 redox reaction such as a Zn/Br redox flow battery (RFB) or a redox-enhanced electrochemical capacitor (Redox-EC) suffer from self-discharge reactions resulting in significant Coulombic loss. To inhibit the self-discharge, quaternary ammonium (Q(+)) and tetraalkylammonium (T+) bromide are added to form ionic liquid (QBr(2n+1)) and solid (TBr3) polybromides during the ESS charging process. The electrochemical formation of liquid QBr(2n+1) and its electrochemical properties have been examined. The detailed mechanisms of ionic solid TBr3 formation, however, have not yet been explored. In this article, we analyzed the ionic liquid-to-solid phase transition of TBr3 particles using a time transient electrochemical method. We suggest the formation of ionic solid TBr3 particles via hydrated TBr3 droplets as an intermediate phase, which are generated by electro-oxidation of Br- in an aqueous TBr solution. We found the phase transition time of TBr3 particles is strongly dependent on the chemical structure of T+ and the concentration of TBr in an aqueous solution.
- URI
- https://pubs.acs.org/doi/10.1021/acs.analchem.9b00190https://repository.hanyang.ac.kr/handle/20.500.11754/110911
- ISSN
- 0003-2700; 1520-6882
- DOI
- 10.1021/acs.analchem.9b00190
- Appears in Collections:
- GRADUATE SCHOOL[S](대학원) > BIONANOTECHNOLOGY(바이오나노학과) > Articles
- Files in This Item:
There are no files associated with this item.
- Export
- RIS (EndNote)
- XLS (Excel)
- XML