Technology assessment and market analysis of solid state ultracapacitors

This report provides quantitative analysis of Solid State Ultracapacitors (SSUs) from technological and financial perspectives. SSUs are Ultracapacitors with solid electrolytes predicted to have huge application potential as the electrical energy storage device in Hybrid Electrical Vehicles (HEVs) due to the projected high energy density. The potential high energy density of SSUs is achieved through engineering dielectric materials to possess high breakdown voltage and/or DC permittivity. Among the available SSU models, Electrical Energy Storage Units (EESUs) have been reported to possess energy density as high as 280 Wh/kg with the permittivity and breakdown voltage enhancements achieved through engineering composition modified barium titanate powders. Organic Solid State Ultracapacitors (OSSUs) is a proposed concept of SSUs with conductive particle filled polymer systems as the dielectric material to take advantage of the systems' giant permittivity phenomenon reported under AC. However, through experiments and modeling, such giant permittivity is not found under DC and it is thought that the reported AC giant permittivity may be strongly distorted by the eddy current loss in the commonly used equivalent circuit characterization model and therefore does not contribute to the energy density enhancement. It is also found that the geometric dispersion of conductive particles does not contribute to the energy storage capability. Hence, it is concluded that OSSU is not a competitive SSU model. EESU would outperform current batteries in HEV applications both in terms of manufacturing cost and fuel efficiency according to the PHEV performance model.

Department dc:contributor.department

Massachusetts Institute of Technology. Dept. of Materials Science and Engineering.

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2007

Author dc:creator

• Jiang, Zibo

Advisor dc:contributor.advisor

• Yet-Ming Chiang.

• Materials Science and Engineering.

Statement dc:rights

• M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.

Licence dc:rights.uri

• http://dspace.mit.edu/handle/1721.1/7582

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/1721.1/42142

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/42142