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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 article, a rationale for predicting new perovskite solid electrolytes was developed based on empirical relationships found between activation energy for anionic transport and perovsite crystallographic-related parameters including (i) the average metal-oxygen bond energy of the pervskite lattice, (ii) the degree of openness, or free volume, of the lattice and (iii) the critical radius ( r c ) saddle point formed by two A and one site through which anionic mediation proceeds.
203 citations
TL;DR: Using the random resistor model, the lithium-ion transport in the composite polymer electrolyte is simulated by the Monte Carlo simulation, demonstrating that the enhanced ionic conductivity can be ascribed to the ionic conduction in the space Charge regions and the percolation of the space charge regions.
Abstract: By dispersing Li6.25Ga0.25La3Zr2O12 (Ga-LLZO) nanoparticles in poly(ethylene oxide) (PEO) matrix, PEO:Ga-LLZO composite polymer electrolytes are synthesized. The PEO: Ga-LLZO composite with 16 vol % Ga-LLZO nanoparticles shows a conductivity of 7.2 × 10–5 S cm–1 at 30 °C, about 4 orders of magnitude higher than the conductivity of PEO. The enhancement of the ionic conductivity is closely related to the space charge region (∼3 nm) formed at the interface between the PEO matrix and the Ga-LLZO nanoparticles. The space charge region is observed by transmission electron microscope (TEM) and corroborated by the phase-field simulation. Using the random resistor model, the lithium-ion transport in the composite polymer electrolyte is simulated by the Monte Carlo simulation, demonstrating that the enhanced ionic conductivity can be ascribed to the ionic conduction in the space charge regions and the percolation of the space charge regions.
203 citations
TL;DR: In this paper, a flexible all-solid-state composite electrolyte is synthesized based on oxygen-vacancy-rich Ca-doped CeO2 (Ca-CeO2) nanotube, lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), and poly(ethylene oxide) (PEO), namely Ca −Ce O2/Li TFSI/PEO.
Abstract: Stable and seamless interfaces among solid components in all-solid-state batteries (ASSBs) are crucial for high ionic conductivity and high rate performance. This can be achieved by the combination of functional inorganic material and flexible polymer solid electrolyte. In this work, a flexible all-solid-state composite electrolyte is synthesized based on oxygen-vacancy-rich Ca-doped CeO2 (Ca–CeO2) nanotube, lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), and poly(ethylene oxide) (PEO), namely Ca–CeO2/LiTFSI/PEO. Ca–CeO2 nanotubes play a key role in enhancing the ionic conductivity and mechanical strength while the PEO offers flexibility and assures the stable seamless contact between the solid electrolyte and the electrodes in ASSBs. The as-prepared electrolyte exhibits high ionic conductivity of 1.3 × 10−4 S cm−1 at 60 °C, a high lithium ion transference number of 0.453, and high-voltage stability. More importantly, various electrochemical characterizations and density functional theory (DFT) calculations reveal that Ca–CeO2 helps dissociate LiTFSI, produce free Li ions, and therefore enhance ionic conductivity. The ASSBs based on the as-prepared Ca–CeO2/LiTFSI/PEO composite electrolyte deliver high-rate capability and high-voltage stability.
203 citations
TL;DR: In this paper, the conductivity at 773 K was 2.3 × 104 S cm−1 for Nd10(SiO4)6O3 (Ln = La, Nd, Sm, Gd and Nd).
Abstract: Electrical properties were investigated for lanthanoid-silicates of Ln10(SiO4)6O3(Ln = La, Nd, Sm, Gd and Nd). The conductivity at 773 K was 2.3 × 104 S cm−1 for Nd10(SiO4)6O3. The sole carrier is the O2− ion, which was determined using an O2 gas concentration cell.
203 citations
TL;DR: In this article, electrical conductivity measurements are reported on the rare earth pyrochlore compound Gd2Ti2O7 as a function of temperature, oxygen partial pressure and aliovalent dopant concentration.
203 citations