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Nitrogen-doped graphene hollow microspheres (NGHMs) were constructed, using polystyrene microspheres (PSMs) as the sacrificial template. Negatively charged graphene oxide nanosheets (GONs) were assembled onto sulfonated PSMs with the aid of poly(ethyleneimine) through electrostatic interaction. NGHMs were obtained by pyrolysis the mixture of melamine and GON-wrapped PSMs under a nitrogen atmosphere...
Partially reduced graphene oxide nanosheet (prGON)/poly(sodium 4-styrenesulfonate) (PSS) composite with very high specific capacitance were prepared. Graphene oxide nanosheets (GON) were firstly partially reduced by a weak reducing agent, and PSS was attached to prGON through π–π stacking, acting as a spacer to prevent prGON from agglomeration. Otherwise, PSS could only bind GON through combining...
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