Fire-resistant and low-temperature self-healing bio-based hydrogel electrolytes based on peach gum polysaccharide/sisal nanofibers for flexible supercapacitors.
Int J Biol Macromol
; : 133759, 2024 Jul 08.
Article
em En
| MEDLINE
| ID: mdl-38986983
ABSTRACT
The introduction of flame retardancy and low-temperature self-healing capacities in hydrogel electrolytes are crucial for promoting the cycle stability and durability of the flexible supercapacitors in extreme environments. Herein, biomass-based dual-network hydrogel electrolyte (named PSBGL), was synthesized with borax crosslinked peach gum polysaccharide/sisal nanofibers composite, and its application in flexible supercapacitors was also investigated in detail. The dynamic cross-linking of the dual-network endows the PSBGL with excellent self-healing performance, enabling ultrafast self-healing within seconds at both room temperature and extreme low temperatures. The PSBGL bio-based hydrogel electrolyte can maintain the integrity of the carbon layer structure with limiting oxygen index of 56â¯% after 60â¯s of combustion under a flame gun. Additionally, the PSBGL exhibits high ionic conductivity (30.12 mS cm-1), good tensile strength (1.78â¯MPa), and robust adhesion to electrodes (1.15â¯MPa). The assembled supercapacitors demonstrate a high specific capacitance of 187.8â¯Fâ¯g-1 at 0.5 A g-1, with 95.9â¯% capacitance retention rate after 10,000â¯cycles at room temperature. Importantly, even under extreme temperatures of 60⯰C andâ¯-â¯35⯰C, the supercapacitors can also maintain high capacitance retention rates of 90.1â¯% and 86.5â¯% after 10,000â¯cycles. This work fills the gap between biomaterial design and high-performance flexible supercapacitors.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article