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Abstract
Non-carbonized photothermal conversion materials (PTCMs) created from polysaccharides are highly intriguing but unexplored for the lacked light-absorbing groups. Meanwhile, macromolecular PTCMs operate as single molecules enable optimal solarthermal conversion remains challenge. Herein, we employ a molecular engineering strategy to enhance chitosan's absorption by incorporating robust-light-absorbing carbonyl groups to fabricate oxidized chitosan (OCTS) with 408% enhancements in solarthermal conversion efficiency due to full‐spectrum solar absorption. Then the water-soluble OCTS is utilized to fabricate gelatin/OCTS/K3Cit/ethylene glycol (GOKE) polyelectrolyte organohydrogel with excellent solarthermal-induced self-healing, ultrastrong mechanical and antibacterial properties. The incorporation of OCTS facilitates GOKE to harvest over 98% full-spectrum solar absorption, 92% solarthermal driven self-healing efficiency after five cycles, and tensile strength and toughness of 5.53MPa and 9.81 MJ m3 attributed to Hofmeister effect strategy. Encouragingly, benefiting from OCTS's excellent solarthermal conversion and polyelectrolyte properties, GOKE is assembled into solarthermalelectric generators (STEG) and triboelectricnanogenerators (TENG), showing dual-mode electric output (50.3mA/16.4Wm2 for STEG and 37V/16.2mWm2 for TENG). Additionally, GOKE-based flexible supercapacitors exhibit energy density of 11.3Whkg1 and specific capacitance of 81.5Fg1, capable of storing energy generated by STEG/TENG. Noteworthy, this study pioneers polysaccharide-based non-carbonized PTCMs with potential applications in clean energy production/storage.
Published Version
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