Journal article
Continuous transition from double-layer to Faradaic charge storage in confined electrolytes
NATURE ENERGY, v 7(3), pp 222-228
01 Mar 2022
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Electrochemical charge storage in a confined space is often interpreted as either electrostatic adsorption or Faradaic intercalation. Here the authors propose that the storage mechanism is a continuous transition between the two phenomena depending on the extent of ion solvation and ion-host interaction.
The capacitance of the electrochemical interface has traditionally been separated into two distinct types: non-Faradaic electric double-layer capacitance, which involves charge induction, and Faradaic pseudocapacitance, which involves charge transfer. However, the electrochemical interface in most energy technologies is not planar but involves porous and layered materials that offer varying degrees of electrolyte confinement. We suggest that understanding electrosorption under confinement in porous and layered materials requires a more nuanced view of the capacitive mechanism than that at a planar interface. In particular, we consider the crucial role of the electrolyte confinement in these systems to reconcile different viewpoints on electrochemical capacitance. We propose that there is a continuum between double-layer capacitance and Faradaic intercalation that is dependent on the specific confinement microenvironment. We also discuss open questions regarding electrochemical capacitance in porous and layered materials and how these lead to opportunities for future energy technologies.
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Details
- Title
- Continuous transition from double-layer to Faradaic charge storage in confined electrolytes
- Creators
- Simon Fleischmann - Helmholtz-Institute UlmYuan Zhang - Leibniz-Institute for New MaterialsXuepeng Wang - University of CaliforniaPeter T. Cummings - Vanderbilt UniversityJianzhong Wu - University of CaliforniaPatrice Simon - Research Network on Electrochemical Energy StorageYury Gogotsi - Drexel UniversityVolker Presser - Leibniz-Institute for New MaterialsVeronica Augustyn - North Carolina State University
- Publication Details
- NATURE ENERGY, v 7(3), pp 222-228
- Publisher
- NATURE PORTFOLIO
- Number of pages
- 7
- Grant note
- 03XP0423 / German Federal Ministry of Education and Research (BMBF) in the 'NanoMatFutur' program; Federal Ministry of Education & Research (BMBF) Agence Nationale de la Recherche (Labex STORE-EX); French National Research Agency (ANR) 951513 / ERC Synergy Grant MoMa-Stor UT Battelle, LLC DE-AC0500OR22725 / Fluid Interface Reactions, Structures and Transport (FIRST) Center, an Energy Frontier Research Center - US Department of Energy, Office of Science, Office of Basic Energy Sciences at Oak Ridge National Laboratory; United States Department of Energy (DOE)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; College of Engineering
- Web of Science ID
- WOS:000770228500001
- Scopus ID
- 2-s2.0-85126745122
- Other Identifier
- 991019167705904721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Energy & Fuels
- Materials Science, Multidisciplinary