气候变化领域集成服务门户(CCPortal): Specific carbon/iodide interactions in electrochemical capacitors monitored by EQCM technique

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DOI	10.1039/d0ee03867a
	Specific carbon/iodide interactions in electrochemical capacitors monitored by EQCM technique
	Platek-Mielczarek A.; Frackowiak E.; Fic K.
发表日期	2021
ISSN	17545692
起始页码	2381
结束页码	2393
卷号	14 期号:4
英文摘要	This paper reports on the ion fluxes at the interfaces of various porous carbon electrodes/aqueous solutions of alkali metal cations (Na+, K+ and Rb+) and iodide anions, monitored by an electrochemical quartz crystal microbalance (EQCM). Different electrode material compositions as well as various electrolyte concentrations have also been considered. By tracking the ions during electrochemical polarization, we aimed to identify the reasons for the fading capacitor performance that occurs during long-term operation. The mass change profile suggests that hydroxide anions are responsible for counterbalancing the charge stored on the negative electrode. Furthermore, we found that iodide-based species are physically adsorbed on the carbon surface immediately after the electrodes come into contact with the electrolyte, regardless of the textural properties of the activated carbon used or electrode composition. Apart from the qualitative description, the mass change profiles allow the sequence of pore occupation to be determined. Additionally, the solvation numbers for alkali metals (Na+, K+ and Rb+) and hydroxide-based species have been determined. It is claimed that the solvation number is strongly affected by the electrolyte composition. Apparently, the concentration of water molecules available in the electrolyte cannot be neglected. The outcome of this research has fundamental and application context. This journal is © The Royal Society of Chemistry.
英文关键词	Electrolytes; Ions; Molecules; Porous materials; Quartz crystal microbalances; Rubidium compounds; Solvation; Application contexts; Electrochemical capacitor; Electrochemical polarization; Electrochemical quartz crystal microbalance; Electrode composition; Electrolyte compositions; Electrolyte concentration; Porous carbon electrodes; Electrochemical electrodes; carbon; chemical reaction; electrochemical method; electrochemistry; iodide
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190707
作者单位	Institute of Chemistry and Technical Electrochemistry, Poznan University of Technology, Berdychowo 4, Poznan, 60-965, Poland
推荐引用方式 GB/T 7714	Platek-Mielczarek A.,Frackowiak E.,Fic K.. Specific carbon/iodide interactions in electrochemical capacitors monitored by EQCM technique[J],2021,14(4).
APA	Platek-Mielczarek A.,Frackowiak E.,&Fic K..(2021).Specific carbon/iodide interactions in electrochemical capacitors monitored by EQCM technique.Energy & Environmental Science,14(4).
MLA	Platek-Mielczarek A.,et al."Specific carbon/iodide interactions in electrochemical capacitors monitored by EQCM technique".Energy & Environmental Science 14.4(2021).