10 research outputs found
Electrochemical and Photovoltaic Properties of Electropolymerized Poly(thienylsilole)s
Donor–Acceptor Polymers for Electrochemical Supercapacitors: Synthesis, Testing, and Theory
Donor–acceptor
polymers can store both a positive and negative charge allowing them
to function as both the positive and negative charge storage material
in a supercapacitor device, however few have been explored for this
application. Here, we describe the synthesis of several donor–acceptor
polymers and their electrodeposited polymer electrodes. We use differing
molecular structures to examine the effect of electron acceptor concentration
and show that device stability can be improved significantly by increasing
the acceptor concentration. Further, we provide computational insight
into the important chemical requirements for achieving even higher
performance supercapacitors based on donor–acceptor conjugated
polymers. Supercapacitor devices with specific energy and specific
power as high as 11 Wh kg<sup>–1</sup> (at 0.5 A g<sup>–1</sup>) and 20 kW kg<sup>–1</sup> (at 50 A g<sup>–1</sup> with an energy of 3.6 Wh kg<sup>–1</sup>) are reported, which
are some of the highest values achieved to date