The Fabrication Of Novel Nitrogen-doped Porous Polymer And Application In Energy Storage And Conversion

The incomparable advantages like economally accessible,environmentally friendly and abundant raw materials of porous polymers endow them with broad application prospects over inorganic materials or metals in aerospace,energy,environment and related fields.The excellent properties of porous polymers can be consolidated and expanded via structural designing and optimizing.Herein,based on the existing research merits and deficiencies,different strategies for designing of nitrogen-doped porous polymer were explored to achieve the efficient control of nitrogen contents and styles at molecule level by changing syhthesis method and introducing functional graphene-directed templates.Heteroatom-doping will enhance intrinsic excellent properties and add new features to carbonaceous materials,thus making the best of their potential,aiming to improve their performance.The main contents and results are listed as follows.1.The ionothermal approach was utilized for the synthesis of Schiff-base type hierarchical porous aromatic polymers with high content of nitrogen up to 11.4% and ultra-high specific surface areas up to 2870 m2 g-1 based on Brunauer-Emmett-Teller methods,respectively.As-synthesized porous polymers were further used to fabricate the electrodes for supercapacitors.Remarkably,one of fabricated electrodes exhibits comparable performance to commercial activate carbon and most of graphene-based active materials,however,shows much better cycling stability.Besides,it can reach a specific capacitance of 129 F g-1 at an extremely high current density of 10 A g-1 and shows no obvious capacitance diminishing even after 10000 charge-discharge cycles.The result proves the strong stability under large current density.2.2D graphene-directed nitrogen-doped sandwich-like frameworks(GPAMs)are fabricated by chemical bonding linkages using functional PANI@GO and the former porous polymer,were further used in di-functional electrochemical application.Remarkably,as supercapacitor electrode materials,GPAMs exhibited comparable performance to commercially activate carbon and most of graphene-based active materials.Besides,the as-prepared GPAMs also show an excellent performance close to Pt-C electrode in the catalysis of ORR for fuel cell.The result proves that this strategy for 2D graphene-directed nitrogen-doped sandwich-like frameworks is an ingenious way for di-functional electrochemical application like supercapacitors,batteries,catalysis and others.