Abstract
HighlightsAn in situ molecular foaming and activation strategy is designed and investigated for the synthesis of hierarchically porous N-doped carbon foams (HPNCFs).The prepared HPNCFs possess 3D macropores, uniform micropores and mesopores, ultrahigh surface areas and high N contents and show high performances in supercapacitors and CO2 capture.
Highlights
Porous carbon materials have received wide interest because of their attractive physicochemical properties, easy compatibility with other elements, and low cost and toxicity, as well as wide applications in energy storage and conversion, adsorption and catalysis [1–7]
The hierarchically macro-/meso-/microporous N-doped carbon foams (HPNCFs) are promising for supercapacitors with high specific capacitances (185–240 F g−1), good rate capability and excellent stability
We demonstrate an acid–base enabled in situ foaming and activation strategy for the synthesis of hierarchically macro-/meso-/microporous N-doped carbon foams (HPNCFs)
Summary
Porous carbon materials have received wide interest because of their attractive physicochemical properties, easy compatibility with other elements, and low cost and toxicity, as well as wide applications in energy storage and conversion, adsorption and catalysis [1–7]. The resultant HPNCFs possess attractive properties, including 3D foam structures constructed by thin carbon walls, ultrahigh surface areas (~ 3200 m2 g−1), large pore volumes (~ 2.0 cm[3] g−1), narrowly distributed micropores and mesopores and high N contents (~ 14.6 wt%). They are promising for supercapacitors showing high specific capacitances, a good rate capability and an excellent stability, as well as attractive for C O2 capture with a large adsorption capacity and an excellent CO2/N2 selectivity
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