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Home Material Sciences The development of new nanodispersed oxide materials for the novel electric energy power sources

The development of new nanodispersed oxide materials for the novel electric energy power sources

Description

Known electrochemical electric energy sources dissatisfy the requirement of modern electronics and electrical engineering because the specific energy capacity of electrode materials are not very high. The current formation processes in most modern galvanic elements are based on the use of alkaline metals intercalation, for example lithium, in the structure of "host"– materials. The development of effective, cheap and ecology safe cathode materials for modern electrochemical power sources is the actual theoretical and practical task.

Among the wide range of perspective cathode materials (layered chalcogenide, spinels, carbon materials) nanopowder oxide materials are very interesting, especially titania and silica. Technology recommendation and solution based on the complex physical- chemical studies of current formation processes in electrochemical power sources on the base of nanodispersed silica, titania and composite materials on their base make possible it utilization as commercial successful cathode materials for lithiumion power sources. The primary purpose of our work is consisted in finding out of lithium ions "guest" kinetics of basic regularities in crystalline and nanodispersed modifications titania and silica and also investigation of dispersion degree influencing of powder materials on specific power characteristic of electric energy sources.

For investigation of lithium ions interstitial process we use the methods of quantum-chemical modeling, chemical potential spectroscopy, optical spectroscopy, mossbauer spectroscopy, impedance spectroscopy and X-ray diffraction.

Innovative Aspect and Main Advantages

  • the technological methods of effective, cheap and ecology safe nanodispersed cathode materials on the silica and titania base with the low agglomerations degree obtaining and utilization are developed;
  • the technological conditions of resistance additions uniform distribution between the fumed silica and titania particles with the purpose of bringing as possible greater size of TiO2 and SiO2 surface for participation in an electro-chemical process are established;cathode materials on the base of fumed silica – carbon nanocomposite with the specific capacity and specific energy, which exceed in 1.5—2 times the characteristics of known commercial electro-chemical lithium sources on the base V6O13 or TіS2 are developed.

Areas of Application

Electric energy generation

voltage dependences
Fig. 1 Discharge voltage dependences of electrochemical cell as a function of
lithium ion "guest" loading degree

Stage of Development

  • Patented
  • Prototype available for testing

Contact Details

Vasyl Stephanyk
Myronyk Ivan F., vice-rector, PhD (chemical science),
Precarpathian National University, Department of Material Science and New Technology
76025, Ivano-Frankivsk, Shevchenko St.,57.
Fax (+380)342231574
Phone (+380)342596029
E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it

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