Topic
Ionic conductivity
About: Ionic conductivity is a research topic. Over the lifetime, 19412 publications have been published within this topic receiving 519167 citations.
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TL;DR: In this paper, the structure and conductivity of crystalline Li-ion conductors are discussed and various strategies currently used to enhance ionic conductivity, including theoretical approaches, ultimately optimizing the electrolyte/electrode interface and improving cell performance.
Abstract: Inorganic solid lithium ion conductors are potential candidates as replacement for conventional organic electrolytes for safety concerns. However, achieving a Li-ion conductivity comparable to that in existing liquid electrolytes (>1 mS cm–1) remains a challenge in solid-state electrolytes. One of the approaches for achieving a desirable conductivity is doping of various elements into the lattice framework. Our discussion on the structure and conductivity of crystalline Li-ion conductors includes description of NAtrium Super Ionic CONductor (NASICON)-type conductors, garnet-type conductors, perovskite-type conductors, and Lithium Super Ionic CONductor (LISICON)-type conductors. Moreover, we discuss various strategies currently used to enhance ionic conductivity, including theoretical approaches, ultimately optimizing the electrolyte/electrode interface and improving cell performance.
208 citations
TL;DR: In this paper, the authors describe one of the most suitable ways for preparing a high Li+ conducting polycrystalline material, which is realized by detailed studies of both the lattice size in the Li+ migrating bulk (intragrain) and the condition of the grain boundaries (integrain).
Abstract: In this Account, the authors describe one of the most suitable ways for preparing a high Li+ conducting polycrystalline material An excellent conductivity was realized by detailed studies of both the lattice size in the Li+ migrating bulk (intragrain) and the condition of the grain boundaries (integrain) 55 refs, 8 figs, 1 tab
208 citations
TL;DR: In this paper, the authors investigated the transport mechanisms of ions and water molecules in perfluorosulfonated ionomer membranes, including Nafion, Aciplex, and Flemion types.
Abstract: To clarify transport mechanisms of ions and water molecules in perfluorosulfonated ionomer membranes, various membranes, such as one Nafion, two Aciplex, and four Flemion types, having different equivalent weight values (EW) were examined. H-, Li-, and Na-form samples were prepared for each membrane by immersion in 0.03 M HCl, LiCl, and NaCl aqueous solutions, and their properties in the fully hydrated state were investigated systematically. The water content of the membranes showed the tendency that the size and/or the number of ionic cluster region increases with decreasing EW value and the Li-form membranes have the most largely expanded ionic cluster regions. The ionic conductivity of the H-form membranes was considerably higher than that of the Li- and Na-form membranes. It was suggested that the proton in the membranes transports by the hopping mechanism and the Li+ and Na+ ions by the vehicle mechanism. In addition, the ionic conductivity of all membranes increased with increasing water content wit...
208 citations
TL;DR: In this article, the ionic conductivity of the polymers improved by a factor of 100 when a hydrocarbon chain was used instead of oligo(ethylene oxide) to minimize the drop in conductivity.
207 citations
TL;DR: In this paper, the role of the oxygen vacancies with respect to the ionic conductivity in perovskites and brownmillerite phases is discussed in detail, and the structures of these phases containing oxygen vacancies are surveyed.
207 citations