Electropolymerized Star-Shaped Benzotrithiophenes Yield π-Conjugated Hierarchical Networks with High Areal Capacitance
Type
ArticleKAUST Department
Chemical Science ProgramFunctional Nanomaterials and Devices Research Group
KAUST Solar Center (KSC)
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
KAUST Grant Number
URF/1/1399Date
2016-05-04Online Publication Date
2016-05-04Print Publication Date
2016-05-18Permanent link to this record
http://hdl.handle.net/10754/604718
Metadata
Show full item recordAbstract
High-surface-area π-conjugated polymeric networks have the potential to lend outstanding capacitance to supercapacitors because of the pronounced faradaic processes that take place across the dense intimate interface between active material and electrolytes. In this report, we describe how benzo[1,2-b:3,4-b’:5,6-b’’]trithiophene (BTT) and tris-EDOT-benzo[1,2-b:3,4-b’:5,6-b’’]trithiophene (TEBTT) can serve as 2D (trivalent) building blocks in the development of electropolymerized hierarchical π-conjugated frameworks with particularly high areal capacitance. In comparing electropolymerized networks of BTT, TEBTT, and their copolymers with EDOT, we show that P(TEBTT/EDOT)-based frameworks can achieve higher areal capacitance (e.g., as high as 443.8 mF cm-2 at 1 mA cm-2) than those achieved by their respective homopolymers (PTEBTT and PEDOT) in the same experimental conditions of electrodeposition (PTEBTT: 271.1 mF cm-2 (at 1 mA cm-2) and PEDOT: 12.1 mF cm-2 (at 1 mA cm-2)). For example, P(TEBTT/EDOT)-based frameworks synthesized in a 1:1 monomer-to-comonomer ratio show a ca. 35x capacitance improvement over PEDOT. The high areal capacitance measured for P(TEBTT/EDOT) copolymers can be explained by the open, highly porous hierarchical morphologies formed during the electropolymerization step. With >70% capacitance retention over 1,000 cycles (up to 89% achieved), both PTEBTT- and P(TEBTT/EDOT)-based frameworks are resilient to repeated electrochemical cycling and can be considered promising systems for high life cycle capacitive electrode applications.Citation
Electropolymerized Star-Shaped Benzotrithiophenes Yield π-Conjugated Hierarchical Networks with High Areal Capacitance 2016 ACS Applied Materials & InterfacesSponsors
The authors acknowledge the financial support of the Office of Competitive Research Funds (OCRF) at King Abdullah University of Science and Technology (KAUST) under the “Competitive Research Grant” (CRG) program No. URF/1/1399. The authors thank the Advanced Imaging and Characterization Laboratories at KAUST for technical support.Publisher
American Chemical Society (ACS)PubMed ID
27028665Additional Links
http://pubs.acs.org/doi/abs/10.1021/acsami.5b09962ae974a485f413a2113503eed53cd6c53
10.1021/acsami.5b09962
Scopus Count
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