Chan Zhang,Haiming Huang,Shaobo Han,Xi Liu,Lixin Mo,Jing Zhao,Jinpeng Mo,Canyan Che
Recent advances in n-type conducting polymers are beginning to rival those of p-type materials. Notably, the n-type conducting polymer poly(benzodifurandione) (PBFDO) demonstrates a notable Seebeck coefficient along with exceptionally high electrical conductivity, positioning it as a promising n-type thermoelectric material with substantial research potential. Despite its promise, the exploration of PBFDO’s thermoelectric properties and the development of related thermoelectric devices have been limited. In this study, we introduce a flexible thermoelectric device that utilizes a combination of the p-type polymer poly(3,4ethylenedioxythiophene):polystyrene sulfonate and the n-type polymer PBFDO, using a straightforward print-and-fold technique. This approach enabled the production of flexible devices with thermoelectric generators whose properties were assessed. The polymer films and the resultant devices demonstrated commendable performance stability even after being subjected to 1,000 bending cycles at a 90° angle. Our findings corroborate the potential of PBFDO as a viable material for flexible thermoelectric applications, a development that is eagerly anticipated in the field.
Liu Yang,Hu Guangkai,Zhang Xin,Lei Cong,Li Yongxiang
Highly flexible carbon-based electrochemical sensing
electrodes
remain a challenge. Introducing conducting polymers into carbon-based
materials is an effective strategy to enhance mechanical flexibility.
In this work, an n-type conducting polymer, poly(benzodifurandione)
(PBFDO), with intrinsic flexibility and ultrahigh conductivity (2000
S cm –1 ) was introduced into carbon-based ink (named
C:PBFDO ink). PBFDO covers the cracks in a carbon-based film, enabling
a uniform surface to dissipate stress. The electrical conductivity
of the C:PBFDO composite film (6.0 ± 0.5 S cm –1 ) was twice that of the carbon-based film, supporting a half-thickness
electrochemical sensing electrode design and further improving the
mechanical flexibility. After 10,000 bending cycles (a bending radius
of 1 mm), the sheet resistance of the C:PBFDO electrode increased
by less than 15%, and the electrochemical performance did not decline
significantly compared with that of the severely attenuated carbon-based
electrodes (CEs). The C:PBFDO composite electrode demonstrates excellent
mechanical flexibility, electrochemical performance, and storage stability,
making it a promising candidate for applications in flexible wearable
electronics.
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