A solar-powered
integrated supercapacitor (SPIS) with an inverted
organic solar cell (iOSC) as the energy conversion
unit and a supercapacitor (SC) as the energy-storage unit is a workable
combination that yields a highly effective self-powered pack. However,
the current designs of these elements are cumbersome and entail multistep
fabricationtwo major application disadvantages. Herein, we
report on a compact SPIS in series with a three-electrode configuration
that uses modified graphene oxide-incorporated poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)
as the common electrode, which is particularly important to integrate
the iOSC with the SC and simultaneously play a role
in the charge collection, transfer, and storage. The SPIS is successfully
constructed through a solution process under mild conditions. Under
1-sun illumination, the iOSC features a weight-specific
power density as high as 6.46 W g–1, enabling the
SC to be fully charged by the iOSC within 33 s to
create a fusion SPIS able to reach ∼0.6 V. The as-developed
SPIS has a thickness of only ∼2.6 μm, and the substrate
is a high-performance candidate for portable and wearable electronic
devices in the future.
Heteroatom-doped carbtableons derived from carbonization of highly porous metal organic framework (MOF) nanocrystals have received tremendous attention due to their exceptional surface areas. They can be used as conductive supports for various electrocatalysts. Depending on the synthesis, various MOFs with different coordination structures, morphologies, and porosities can be designed for versatile applications such as gas storage, catalysis, and energy storage systems. In this work, we combine nitrogen-doped carbon nanoparticles derived from zeolitic imidazolate framework (ZIF-8) with PEDOT:PSS, a conductive polymer mixture, for highly flexible supercapacitor electrode. The composite film exhibits a 3D interconnected network favorable for fast charge transfer kinetics with a high surface area. This nitrogen-doped porous carbon-PEDOT:PSS composite film shows good specific energy of 7.19 Wh kg À1 and good rate performance as well as long cycle life for at least 5000 charge-discharge cycles.
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