Effect of pressure on ion transport in amorphous and semi-crystalline polymer electrolytes
文献信息
Z. Stoeva, C. T. Imrie, M. D. Ingram
Ionic conductivities of polyethylene oxide (PEO) complexes with LiClO4 have been measured at pressures up to 200 MPa over the temperature range 303–353 K. Two systems differing in phase morphology are compared by reference to their temperature-dependent activation energies and volumes. For an amorphous complex of composition PEO ∶ LiClO4(6 ∶ 1), Vogel–Tammann–Fulcher (VTF) behaviour is found, enabling activation energies to be calculated as a function of temperature from the best fit equation, while activation volumes are obtained directly from the isothermal pressure dependence of the conductivity. While the behaviour of the amorphous complex is adequately described by the free volume model, the corresponding data for a polycrystalline material of overall 20 ∶ 1 stoichiometry suggests the prevalence of surface conduction at lower temperatures. Such variable-pressure, variable-temperature (VPVT) data may in future provide new insights into the behaviour of more complex polymer electrolyte systems.
期刊推荐

Journal of Catalysis

Molecular Pharmacology

Pharmacological Reviews

Planta Medica

Journal of Physics and Chemistry of Solids

Journal of Heterocyclic Chemistry

Russian Chemical Reviews

Proceedings of the National Academy of Sciences of the United States of America

Organic Preparations and Procedures International

Kinetics and Catalysis
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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.




