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Super Dielectric Materials.

Samuel Fromille1, Jonathan Phillips2

  • 1Physics Department, Naval Postgraduate School, Monterey, CA 93943, USA. sfromille@gmail.com.

Materials (Basel, Switzerland)
|August 10, 2017
PubMed
Summary
This summary is machine-generated.

New super dielectric materials (SDM) with dielectric constants over 4 × 10⁸ were created using inexpensive alumina and boric acid. These materials, forming New Paradigm Super (NPS) capacitors, show potential for high-density energy storage.

Keywords:
capacitordielectricenergy

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Conventional dielectric materials have limitations in energy storage.
  • Super dielectric materials (SDM) offer significantly higher dielectric constants.
  • Previous SDM research reported dielectric constants around 1 × 10⁴.

Purpose of the Study:

  • To develop readily accessible super dielectric materials (SDM) from common materials.
  • To investigate the dielectric properties of porous alumina loaded with boric acid solution.
  • To explore the potential of these new materials for energy storage applications.

Main Methods:

  • High surface area alumina powders were loaded with boric acid solution to the incipient wetness point.
  • Dielectric constants were measured at low frequencies (<10⁻² Hz).
  • Capacitors were fabricated using the developed SDM dielectrics (alumina with boric acid solution) and tested for capacitive behavior and voltage limits.

Main Results:

  • Materials with dielectric constants greater than 4 × 10⁸ were successfully generated.
  • The developed materials, termed New Paradigm Super (NPS) capacitors, exhibit electrostatic capacitive behavior.
  • NPS capacitors demonstrated a maximum effective operating voltage of approximately 0.8 V.
  • A theoretical model explaining the high dielectric constant via ion migration in saturated pores was proposed.

Conclusions:

  • Common, inexpensive materials can be readily transformed into super dielectric materials (SDM).
  • The proposed mechanism of ion migration within saturated pores explains the observed high dielectric constants.
  • New Paradigm Super (NPS) capacitors show promise for surpassing conventional supercapacitors in volumetric energy density.