Ultra high energy density and fast discharge nanocomposite capacitors

Haixiong Tang; Henry A. Sodano

doi:10.1117/12.2009361

3 April 2013 Ultra high energy density and fast discharge nanocomposite capacitors

Haixiong Tang, Henry A. Sodano

Proceedings Volume 8689, Behavior and Mechanics of Multifunctional Materials and Composites 2013; 868902 (2013) https://doi.org/10.1117/12.2009361
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2013, San Diego, California, United States

Abstract

Nanocomposites containing high dielectric permittivity ceramics embedded in high breakdown strength polymers are currently of considerable interest as a solution for the development of high energy density capacitors. However, the improvement of dielectric permittivity comes at expense of the breakdown strength leading to limit the final energy density. Here, an ultra-high energy density nanocomposite was fabricated based on high aspect ratio barium strontium titanate nanowires. The pyroelectric phase Ba_0.2Sr_0.8TiO₃ was chosen for the nanowires combined with quenched PVDF to fabricate high energy density nanocomposite. The energy density with 7.5% Ba_0.2Sr_0.8TiO₃ nanowires reached 14.86 J/cc at 450 MV/m, which represented a 42.9% increase in comparison to the PVDF with an energy density of 10.4 J/cc at the same electric field. The capacitors have 1138% greater than higher energy density than commercial biaxial oriented polypropylene capacitors (1.2 J/cc at 640). These results demonstrate that the high aspect ratio nanowires can be used to produce nanocomposite capacitors with greater performance than the neat polymers thus providing a novel process for the development of future pulsed-power capacitors.

Citation Download Citation

Haixiong Tang and Henry A. Sodano "Ultra high energy density and fast discharge nanocomposite capacitors", Proc. SPIE 8689, Behavior and Mechanics of Multifunctional Materials and Composites 2013, 868902 (3 April 2013); https://doi.org/10.1117/12.2009361

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