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: The Haven ratio is calculated from the bulk ionic conductivity and the individual diffusion coefficients of cations and anions and the maximal apparent lithium transference number is higher than found in other recent studies on ionic liquid electrolytes containing lithium ions.
Abstract: spectroscopy and pulsed field gradient NMR Molar ratios x ) nLi-TFSI/(nLi-TFSI + nBMP-TFSI) up to 0377 could be achieved without crystallization From the bulk ionic conductivity and the individual diffusion coefficients of cations and anions we calculate the Haven ratio and the apparent lithium transference number Although the Haven ratio exhibits typical values for ionic liquid electrolytes, the maximal apparent lithium transference number is higher than found in other recent studies on ionic liquid electrolytes containing lithium ions On the basis of these results we discuss strategies for further improving the lithium transference number of such electrolytes
198 citations
TL;DR: In this article, an atomic-scale study was conducted to reveal the origin of the large grain-boundary (GB) resistance in Li-ion-conducting solid electrolytes and the importance of the grain boundary modification to the macroscopic Li+ conductivity.
Abstract: Li-ion-conducting solid electrolytes are the potential solution to the severe safety issues that occur with conventional batteries based on solvent-based electrolytes. The ionic conductivity of solid electrolytes is in general too low, however, due to a high grain-boundary (GB) resistance. A thorough understanding of the ionic transport mechanism at GBs in these materials is critical for a revolutionary development of next-generation Li batteries. Herein we present the first atomic-scale study to reveal the origin of the large GB resistance; (Li3xLa2/3−x)TiO3 was chosen as a prototype material to demonstrate the concept. A strikingly severe structural and chemical deviation of about 2–3 unit cells thick was revealed at the grain boundaries. Instead of preserving the ABO3 perovskite framework, such GBs were shown to consist of a binary Ti–O compound, which prohibits the abundance and transport of the charge carrier Li+. This observation has led to a potential strategy for tailoring the grain boundary structures. This study points out, for the first time, the importance of the atomic-scale grain-boundary modification to the macroscopic Li+ conductivity. Such a discovery paves the way for the search and design of solid electrolytes with superior performance.
198 citations
TL;DR: In this article, the ionic conductivity and DSC measurement of molten salt-type polymer brushes were carried out and poly(ethylene oxide) derivatives having both vinyl group and imidazolium salt structure on their ends were prepared and polymerized to analyze the effect of flexible spacer.
198 citations
TL;DR: In this paper, Li3PO4-Li2S-SiS2 and In-LixCoO2 were found to be good candidates for the electrode materials in solid state batteries with the glass for their electrode reactions with high reversibility.
198 citations
TL;DR: In this paper, solid polymer electrolytes based on polyvinyl alcohol (PVA) complexed with sodium fluoride (NaF) at different weight percent ratios were prepared using solution cast technique.
197 citations