Aromatic polyaroxydiazole pseudocapacitive anode materials with tunable electrochemical performance through side group engineering

文献情報

出版日 2023-11-27

DOI 10.1039/D3TA06374G

インパクトファクター 12.732

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要旨

Conductive polymers (CPs) are promising electrode materials for pseudocapacitors due to their high electronic conductivity and outstanding pseudocapacitive charge storage capability. Herein, aromatic polyaroxydiazole (POD) with high electron deficient oxadiazole rings were synthesized to develop n-type CPs by side group engineering. Electron-withdrawing side groups (i.e., –F, –Br, –NO2) were imported to phenylenes to tune the main chain's electronic structure, making the oxadiazole rings more electron-deficient. The lowest unoccupied molecular orbital (LUMO) and energy gap of the resulting POD can be achieved using the side group of –NO2, which has the LUMO energy level of −4.16 eV with the onset doping potential of −0.46 V (vs. Ag/AgCl). Meanwhile, its energy gap and electronic conductivity are 2.98 eV and 4.07 × 10−4 S cm−1, respectively, indicating good electronic conductivity. A binder-free anode composed of poly(1,4-phenylene-1,3,4-oxadiazole) (p-POD) and commercial activated carbon (YP80F) was prepared and used to construct an asymmetric supercapacitor, which could deliver a high operating voltage of 2.35 V, a maximum energy density of 20 W h kg−1 with a power density of 6832.2 W kg−1. Therefore, POD is a promising pseudocapacitive anode material with a tunable chemical structure, high capacitance, and high conductivity for pseudocapacitors.

掲載誌

Journal of Materials Chemistry A

CiteScore: 19.5

自己引用率: 4.7%

年間論文数: 2211

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment

Aromatic polyaroxydiazole pseudocapacitive anode materials with tunable electrochemical performance through side group engineering

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Journal of Materials Chemistry A

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