Cu-Ion Hybrid Porous Carbon with Nanoarchitectonics Derived from Heavy-Metal-Contaminated Biomass as Ultrahigh-Performance Supercapacitor.

As the Cu content increased from 0 to 50 mg/g, the percentage content of C in porous carbon was relatively reduced, the percentage contents of N, H, and O were relatively increased, and the O/C ratio showed an increasing trend, indicating that the addition of Cu enhanced the demethanation reaction in the porous carbon.

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