Abstract
The development of new electrolyte and electrode designs and compositions has led to advances in electrochemical energy-storage (EES) devices over the past decade. However, focusing on either the electrode or electrolyte separately is insufficient for developing safer and more efficient EES devices in various working environments, as the energy-storage ability is determined by the ion arrangement and charge and/or electron transfer at the electrode–electrolyte interface. In this Review, we assess the fundamental physicochemical and electrochemical properties at the electrode–electrolyte interfaces in Li-ion batteries and supercapacitors using safe and electrochemically stable ionic-liquid electrolytes. Key reactions and interactions at the electrode–electrolyte interface, as well as geometric constraints and temperature effects, are highlighted. Building on the fundamental understanding of interfacial processes, we suggest potential strategies for designing stable and efficient ionic-liquid-based EES devices with emerging electrode materials.
Original language | English |
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Pages (from-to) | 787-808 |
Number of pages | 22 |
Journal | Nature Reviews Materials |
Volume | 5 |
Issue number | 11 |
DOIs | |
State | Published - Nov 1 2020 |
Funding
This research was sponsored, in part, by the Fluid Interface Reactions, Structures and Transport (FIRST) Center, an Energy Frontier Research Center funded by the US Department of Energy, Office of Science and Office of Basic Energy Sciences. The work of M.S., J.C.V. and M.W.G. at Boston University was supported by Samsung Electronics Co. (Samsung Advanced Institute of Technology, SAIT). The authors also acknowledge K. Van Aken, A. Levitt and X. Lin for helpful discussions.