期刊
ELECTROANALYSIS
卷 26, 期 1, 页码 109-120出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.201300161
关键词
S-doped nanoporous carbon; Graphene/carbon composite; Capacitance; Conductivity; Surface chemistry; Porosity
The composites of nanoporous carbon and graphene were prepared by carbonization of mixed sulfonate-based polymers and graphite oxide. Addition of the graphene phase modified the texture and chemistry of the final products. The materials show high electrochemical capacity in spite of the relatively low surface area. The good performance is linked to the presence of sulfur in the small pores, which brings a positive charge on carbon atoms and thus increases the attraction to anions, to the sulfones, sulfoxides and quinones in larger pores, which undergo Faradaic reactions, and to the balanced content of oxygen groups, which provides the wettability.
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