Showing papers in "Solid State Ionics in 2011"

TL;DR: In this paper, the structure of Li2S−P2S5 glasses and glass-ceramics after exposure to air was investigated for the first time, and Raman spectroscopy demonstrated that the 75Li2S∙25P 2S5 (mol%) glass and glassceramic composed of Li+ and PS43− ions did not exhibit obvious structural changes on exposure to the atmosphere.

TL;DR: In this article, the initial performance and durability of a solid oxide cell applied for co-electrolysis of CO2 and H2O was examined, and the authors used the use of the distribution of relaxation times (DRT) to study cell degradation without relying on a model.

TL;DR: LiNi0.5Mn1.5O4 is generally reported to crystallize in the spinel structure within two different space groups (Fd-3m and P4(3)32) depending on the oxygen stoichiometry/ordering of the Ni/Mn cations.

TL;DR: In this article, the crystal structures of and phase transitions in the Li3PS4, which is part of the thio-LISICON (LIthium Super Ionic CONductor) family, were studied using high-temperature synchrotron X-ray diffraction measurements and thermal analysis.

TL;DR: In this paper, a modified sol-gel Pechini method was used to synthesize Li 7 La 3 Zr 2 O 12 (LLZO) nanopowders from the stoichiometric mixtures of lithium carbonate, lanthanum oxide and zirconium ethoxide.

TL;DR: The garnet-type cubic and tetragonal phases with respective high and low lithium ion conductivity were synthesized using precursors prepared by a sol-gel method as mentioned in this paper.

TL;DR: In this article, the ionic conductivity of mixtures of poly(ethylene oxide) (PEO) and lithium bis(trifluoromethanesulfone)imide (LiTFSI) was measured as a function of molecular weight of the PEO chains, M, over the range 0.2-5000 kg/mol.

TL;DR: In this article, Nanocomposite polymer electrolyte solution casting Ceramic filler Ionic conductivity Activation energy is used to generate energy. But the authors focus on the energy consumption of the filler.

TL;DR: In this article, the chemical diffusion coefficients of Li3V2(PO4)3 (LVP) anode material as a function of cell voltage between 3.0 and 0.0 were systematically determined by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic intermittent titration technique (GITT).

TL;DR: In this paper, a model that relates resistance to time-dependent LSCF surface area, based on surface diffusion limited coarsening, was proposed to predict that the cathode resistance should increase from ~ 0.2 to 0.28-0.35 cm2, if maintained at the operating temperature of 600-°C for 40,000h.

TL;DR: Li 7−−x La 3 Zr 2 O 12−−−0.5x (LLZ) ceramics with garnet-type structure were prepared via the conventional solid-state reaction method.

TL;DR: Amorphous thin solid films of lithium phosphorus oxynitride (LiPON) were prepared by radiofrequency sputtering from a Li 3 PO 4 target by varying nitrogen flow rate as mentioned in this paper.

TL;DR: In this article, an experimental investigation on a sodium ion conducting gel polymer electrolyte nanocomposite based on poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP), dispersed with silica nanoparticles are reported.

TL;DR: In this paper, the polyethylene oxide (PEO) based lithium ion conducting polymer electrolytes complexed with lithium trifluoromethanesulfonate (LiCF 3 SO 3 or LiTf) plasticized with an ionic liquid 1-ethyl 3-methyl imidazolium triflomeromethane sulfurate (EMITf) have been reported.

TL;DR: In this paper, the performance characteristics of electrical double layer capacitors (EDLCs) based on the multiwalled carbon nanotube (MWCNT) electrodes and ionic liquid incorporated poly(ethylene oxide) (PEO) based magnesium and lithium ion conducting polymer electrolytes have been studied.

TL;DR: In this article, the ABO3 perovskite phase was found to occur at low oxygen partial pressures (below 10−−20 ǫ bar) using an atmosphere-controlled high-temperature XRD setup, the rhombohedral lattice parameters were obtained between 10−4 and 1Õbar at 773 to 1173 K.

TL;DR: In this article, the long-term degradation of the surface oxygen exchange kinetics of the IT-SOFC cathode material La 0.58 Sr 0.4 Co 0.2 Fe 0.8 O 3 −−− δ (LSCF) is investigated in dry and wet O 2 -Ar atmospheres at 600-700°C.

TL;DR: An improved electrode geometry is proposed to study thin ion conducting films by impedance spectroscopy and it is shown that long, thin, and closely spaced electrodes arranged interdigitally allow a separation of grain and grain boundary effects also in very thin films.

TL;DR: In this article, the short-term changes in the electrical conductivity of Ni-YSZ composites (cermets) suitable for use in Solid Oxide Fuel Cells (SOFC) were measured by an in-situ 4-point DC technique.

TL;DR: In this paper, a series of poly(ethylene oxide)-based composite polymer electrolyte films containing variable content of organic non-ionic plasticizer (succinontrile) have been successfully prepared by using self-made lithium bis(oxalate)borate as the thermally stable, environmentally friendly and low-cost lithium salt.

TL;DR: In this article, the addition of Cu into Mn-Co spinel materials showed two main advantages: Firstly, thermal expansion behavior of Mn-co spinel was altered, which could be more compatible with that of metallic substrates; Secondly, the sintering temperature was reduced, which was favorable for the dip-coating and sinting process.

TL;DR: In this paper, the chemical and structural stability of perovskite-derived SrCo0.8Fe0.2O3−δ (SCF) and SCFTa were investigated by both isothermal gravimetric and X-Ray diffraction.

TL;DR: In this article, the degradation of the oxygen exchange kinetics of the solid oxide fuel cell cathode material La0.58Sr0.4Co0.2Fe0.8O3−−δ (LSCF) is investigated at 600°C.

TL;DR: In this paper, the first-principles supercell calculations of oxygen vacancies in the Ba 0.5 Sr0.5 Co 1− y Fe y O 3− δ (BSCF) perovskites are presented.

TL;DR: In this paper, a cobalt-free La0.6Sr0.4Fe0.8Sm0.2O3-δ composite cathode and SDC-ternary carbonate composite electrolyte was used for the synthesis of ammonia.

TL;DR: In this paper, the electrical and electrochemical properties of the 70Li 2 S·(30−− ǫ)P 2 S 5 ·1P 2S 3 (mol%) glass-ceramics were investigated and trivalent phosphorus and oxygen were incorporated into the Li 7 P 3 S 11 crystal.

TL;DR: In this paper, the ionic conductivity of polyethyl-3methylimidazolium tosylate (EMIM-TY) polymer electrolyte films is characterized by Fourier Transform Infrared Spectroscopy (FTIR), Differential Scanning Calorimetry (DSC), X-ray Diffraction (XRD), and Complex Impedance Spectral Spectral Imaging (CSI) techniques.

TL;DR: In this article, the area specific resistance (ASR) of a symmetrical cell with a layered cathode structure consisting of a thin compact LNO layer between the dense electrolyte and porous electrode was investigated by AC impedance spectroscopy.

TL;DR: In this paper, the performance of porous La0.6Sr0.4Co0.2Fe0.8O3−−δ (LSCF) cathodes is improved by inserting a dense LSCF layer.

TL;DR: In this paper, a co-precipitation method was used to synthesize ammonia from hydrogen and nitrogen under atmospheric pressure using CoFe 2 O 4 as catalyst and carbonate-LiAlO 2 composite as electrolyte respectively.