| 1. |
- Wolkeba, Zewdneh Genene, 1983, et al.
(författare)
-
Recent Advances in the Synthesis of Conjugated Polymers for Supercapacitors
- 2024
-
Ingår i: Advanced Materials Technologies. - 2365-709X. ; 9:9
-
Forskningsöversikt (refereegranskat)abstract
- Conjugated polymers have attracted growing attention for versatile applications in energy storage due to their potential benefits including low-cost processing, molecular tunability, environmental benignity, and high mechanical flexibility. In particular, polymer-based organic electrode materials have shown significant progress in supercapacitor (SC) applications with superior electrochemical behaviors. The performances of SCs are closely related to the intrinsic characteristics of different polymers in the nanoscale and the morphological features of the polymer-based electrode materials obtained by different fabrication techniques in the macroscale. This review summarizes the design and synthesis of both p-type and n-type conjugated polymers, highlighting the pros and cons of three synthesis techniques: electrochemical polymerization, chemical polymerization, and in situ polymerization. The performances of conjugated polymers in SCs, their cycling stabilities, and structure-performance relationships are discussed. Moreover, the existing challenges and future directions of polymer-based SCs are considered with respect to energy density, stability, and large-scale production to promote commercialization.
|
|
| 2. |
- Yang, Guijun, 1991, et al.
(författare)
-
Nitrogen and iron co-doped carbon quantum dots/MnO 2 nanowire composites for flexible solid-state supercapacitors with high areal capacitance
- 2023
-
Ingår i: Journal of Alloys and Compounds. - 0925-8388. ; 960
-
Tidskriftsartikel (refereegranskat)abstract
- Herein, the synthesis of MnO2 nanowires decorated with transition metal-doped carbon quantum dots (MCQDs) is described for use as binder-free flexible solid-state supercapacitors. In particular, the water-soluble Fe and N co-doped MCQDs prepared by amidation reaction with ferric ammonium citrate and urea had ultrafine particle morphologies and showed super-hydrophilicity in aqueous solution, which greatly improved the contact probability between the electrode and the electrolyte. In addition, the co-doped MCQDs increased both the electrical conductivity and specific capacitance of the MnO2/carbon-based nanocomposites and limited the collapse and exfoliation of the MnO2 structure during extended cycling. Compared with pristine MnO2 electrode, the MCQDs/MnO2 composite electrode exhibited faster charge-discharge rate and improved cycle stability with increased specific capacitance. The flexible symmetric supercapacitor constructed from the MCQDs/MnO2 composite had a capacitance retention of 85.6 % after 10,000 charge/discharge cycles at a current density of 2 mA cm−2. In addition, the device showed a maximum power density of 4.8 W cm−2 at an energy density of 2.3 mW h cm−2, and a maximum energy density of 11.16 mW h cm−2 at a power density of 311.6 mW cm−2. Data Availability Statement: The data that support the findings of this study are available from the corresponding author upon reasonable request.
|
|
