Chitin molecules are rich in nitrogen and oxygen elements,
with
great potential as a carbon-based electrode precursor. However, the
direct preparation of chitin-based porous carbon materials (PCMs)
often involves multiple complex carbonization processes, which increases
the difficulty of large-scale applications, and the specific capacitance
also needs to be further improved. Herein, the precursor of porous
carbon was obtained by a one-step carbonization from regenerated chitin
film after dissolving in lithium chloride and N,N-dimethylacetamide. The Brunauer–Emmett–Teller
and morphological assessments showed that the hierarchical porous
structure with high specific surface area (2332.0 m2 g–1) could be achieved under the activator of KOH. At
0.5 A g–1, it had a specific capacitance of 255.5
F g–1. It showed a capacitance retention rate of
91.89% after 5000 cycles, indicating good cycle stability. Therefore,
the dissolution and regeneration strategy of chitin provides a new
method for the preparation of PCMs used as a supercapacitor electrode.
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