1,721,049 research outputs found
Nanocomposite lithium ion conducting membranes
No full textThis review describes the properties and characteristics of a class of membranes formed by blends of a lithium salt, LiX, where X is preferably a large soft anion, such as ClO4 or N(CF3SO2)(2), and a high molecular weight polymer containing Li+-coordinating group, such as polyethylene oxide (PEO) with the dispersion of selected ceramic powders, such as TiO2, Al2O3, and SiO2, at the nanoscale particle size. These nanocomposite membranes behave as lithium polymer electrolytes, that is, they exhibit a high lithium ion conductivity. Because of this property, the PEO-LiX nanocomposite electrolytes may rind an important application as separators in advanced, rechargeable lithium polymer batteries
High-performance electrolyte membranes for plastic lithium batteries
No full textThe synthesis, properties, and application of new types of lithium-ion conducting polymeric membranes are reported and discussed. These ionic membranes are dimensionally stable, have a very high ionic conductivity, an acceptable lithium-ion transference number and a wide electrochemical stability window. Due to these favourable properties, these membranes are suitable for the fabrication of advanced-design, high-performance batteries and power source devices
Impedance spectroscopy study of PEG-based nanocomposite polymer electrolytes
No full textThe addition of nanometric fillers (e.g., SiO2, TiO2) to P(EO)(n)LIClO4 polymer electrolytes induces consistent improvement in the transport properties. The increase in conductivity and in the cation transference number is attributed to the enhancement of the degree of the amorphous phase in the polymer matrix, as well as to some acid-base Lewis type, ceramic-electrolyte interactions. This model is confirmed by results obtained from a detailed impedance spectroscopy study carried out on poly(ethylene oxide) [P(EO)]-based polymer electrolyte samples with and without ceramic fillers. (C) 2000 The Electrochemical Society. S0013-4651(99)10-094-6. All rights reserved
Kinetics and Stability of the Lithium Electrode In Poly(methylmethacrylate)-based Gel Electrolytes
No full textThe transport and electrochemical properties of gel-type ionic conducting membranes formed by immobilizing liquid solutions of lithium salts in a poly(methylmethacrylate) matrix have been determined. In particular, the conductivity, the lithium ion transference number and the electrochemical stability window are evaluated and discussed. Finally, particular attention is devoted to the phenomena occuring at the interface between these ionic membranes and the lithium metal electrode
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