Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 33, Pages 30360-30367Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b10956
Keywords
synthetic pheomelanin; biopigment; N,S-codoping; supercapacitors
Funding
- National Natural Science Foundation of China [21774079, 51602265, 21574087]
- State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials, Southwest University of Science and Technology [17kffk7]
- State Key Laboratory of Polymer Materials Engineering, Sichuan University [sklpme2018-2-04]
- Fundamental Research Funds for Central Universities
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Biomass-based energy storage devices have drawn increasing attention owing to their renewability and sustain ability, particularly that the heteroatom-doped carbons derived from natural polymers are regarded as the promising candidates in discovering advanced electrode materials for supercapacitors. This work has developed a facile one-pot fabrication strategy toward synthetic pheomelanin nanoparticles with controllable size and chemical composition (i.e., sulfur content) via the copolymerization of dopamine and cysteine. The resulting synthetic pigment materials possess outstanding thermal stability and are able to directly transform into monodispersed S,N-codoped carbon spheres with unaltered morphology. Compared with conventional polydopamine-based carbon spheres, the present carbonized pheomelanin nanoparticles with electroactive sulfur atoms could possess lower charge-transfer resistance and consequently higher specific capacitance (e.g., 243 F g(-1) at 1 A g(-1)). This research continues to inspire researchers to develop new kinds of energy storage materials based on synthetic biopigment materials.
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