Tube-Super Dielectric Materials: Electrostatic Capacitors with Energy Density Greater than 200 J cm ˉ³
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Authors
Phillips, Jonathan
Quintero Cortes, Francisco Javier
Subjects
energy storage
capacitor
dielectric materials
titania nanotube arrays
capacitor
dielectric materials
titania nanotube arrays
Advisors
Date of Issue
2015-09-17
Date
September 17, 2015
Publisher
Language
Abstract
The construction and performance of a second generation of super dielectric
material based electrostatic capacitors (EC), with energy density greater than 200 J cm ˉ³,
which rival the best reported energy density of electric double layer capacitors (EDLC), also
known as supercapacitors, are reported. The first generation super dielectric materials (SDM)
are multi-material mixtures with dielectric constants greater than 1.0 10⁵, composed
of a porous, electrically insulating powder filled with a polarizable, ion-containing liquid.
Second-generation SDMs (TSDM), introduced here, are anodic titania nanotube arrays filled
with concentrated aqueous salt solutions. Capacitors using TiO₂ based TSDM were found to
have dielectric constants at ~0 Hz greater than 10⁷ in all cases, a maximum operating voltage
of greater than 2 volts and remarkable energy density that surpasses the highest previously
reported for EC capacitors by approximately one order of magnitude. A simple model based
on the classic ponderable media model was shown to be largely consistent with data from
nine EC type capacitors employing TSDM.
Type
Article
Description
The article of record as published may be found at http://dx.doi.org/10.3390/ma8095301
Series/Report No
Department
Physics
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
US Navy (Naval Research Program, Project: P14-0463)
US Marine Corps (Expeditionary Energy Office)
US Marine Corps (Expeditionary Energy Office)
Funder
US Navy (Naval Research Program, Project: P14-0463)
US Marine Corps (Expeditionary Energy Office)
US Marine Corps (Expeditionary Energy Office)
Format
20 p.
Citation
Cortes, Francisco Javier Quintero, and Jonathan Phillips. "Tube-super dielectric materials: Electrostatic capacitors with energy density greater than 200 J· cm− 3." Materials 8.9 (2015): 6208-6227.
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.