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Article Abstract
This study reports a new strategy to regulate the over-foaming of lignin towards carbon foam production. By adding ammonium sulfate ((NH)SO) to lignin during the thermal conversion process, carbon foam precursor with uniform macrostructure independent of heating conditions are achieved. The mechanism between the interaction of lignin and (NH)SO is discussed, and the resulting nitrogen (N), sulfur (S)-codoped carbon foam exhibits a hierarchical porous structure with compressive strength of 1.5 MPa and several other attractive properties as self-standing electrodes. Benefiting from the continuous and porous carbon network in addition to the N, S co-doping effect, it facilitates efficient electron transport and offers abundant active sites. The L1A2-1000-1-CF electrode in assembled symmetric solid-state supercapacitor device can deliver as high as 9070.9 mF cm at 2 mV s. This study provides a facile synthesis of N, S-codoped lignin-derived carbon foam electrodes, highlighting their potential in high-areal capacitance energy storage systems.
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| http://dx.doi.org/10.1016/j.biortech.2025.132926 | DOI Listing |
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