The paper presents electrical and mechanical properties of structural supercapacitors and discusses limitations associated
with the approach taken for the electrical properties evaluation. The structural supercapacitors characterized in this work
had the electrodes made of carbon fiber weave, separator made of several cellulose based products, and the solid
electrolyte made as PEGDGE based polymer blend. The reported electrical properties include capacitance and leakage
resistance; the former was measured using cyclic voltammetry. Mechanical properties have been evaluated thorough
tensile and three point bending tests performed on structural supercapacitor coupons.
The results indicate that the separator material plays an important role on the electrical as well as mechanical properties
of the structural capacitor, and that Celgard 3501 used as separator leads to most benefits for both mechanical and
electrical properties. Specific capacitance and leakage resistance as high as 1.4kF/m3 and 380kΩ, respectively, were
achieved. Two types of solid polymer electrolytes were used in fabrication, with one leading to higher and more
consistent leakage resistance values at the expense of a slight decrease in specific capacitance when compared to the
other SPE formulation. The ultimate tensile strength and modulus of elasticity of the developed power storage composite
were evaluated at 466MPa and 18.9MPa, respectively. These values are 58% and 69% of the tensile strength and
modulus of elasticity values measured for a single layer composite material made with the same type of carbon fiber and
with a West System 105 epoxy instead of solid polymer electrolyte.© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.