Abstract
Conjugated microporous polymers (CMPs) have attracted intensive attention owing to their permanent nanoporosity, large surface area and possibility for functionalization, however their application in energy storage suffers from poor conductivity and low hetero-atom content. Here, we demonstrate a hybrid of conjugated microporous polymers and graphene aerogel with improved conductivity. After treating at 800°C in NH3, the nitrogen content increases to 9.8%. The resulting microporous carbon exhibits a significant rise in supercapacitive performance up to 325 F g−1, 55% higher than pristine triazine-based CMPs, with energy density up to 12.95 Wh kg−1. Moreover, it has high stability with 99% retention after 10,000 cycles at 5 A g−1. The synergy of hierarchical porous structure, graphene-based conduction path and high percentage of hybridization with nitrogen ensures effective ion/electron transport and diffusion, making NH3-treated graphene aerogel/CMP hybrid a promising electrode material in high-performance supercapacitor.
Highlights
Conjugated microporous polymers (CMPs) are one kind of covalently linked organic porous materials which have attracted extensive interest in recent years due to their strong π-conjugated linkage, permanent nanoporosity, large surface area, possibility to modify functional groups as well as high stability compared with other porous organic materials (Xu et al, 2013)
CMPs with high carbon content are synthesized by coupling reactions, it usually results in poor wettability of CMPs-based electrode
The isotherm of the N-graphene aerogels (GA)/CMPs reveals a typical II type, which indicates the combination of micro-pores and meso-pores in the material
Summary
Conjugated microporous polymers (CMPs) are one kind of covalently linked organic porous materials which have attracted extensive interest in recent years due to their strong π-conjugated linkage, permanent nanoporosity, large surface area, possibility to modify functional groups as well as high stability compared with other porous organic materials (Xu et al, 2013). (Zhang and Zhao, 2009; Wang G. et al, 2012; Peng et al, 2014; Salunkhe et al, 2014; Wang Q. et al, 2014)Compared with traditional supercapacitor electrode materials, CMPs have high specific surface area and the possibility to tailor pore and channel structures. The CMPs are normally produced by solvothermal method, which is Triazine-Based Conjugated Microporous Polymers suitable for carbon-carbon bond-forming reactions. CMPs produced by solvothermal method have relatively poor orbital overlap due to the twisted benzene rings, leading to low electrical conductivity (Lee et al, 2016). CMPs with high carbon content are synthesized by coupling reactions, it usually results in poor wettability of CMPs-based electrode
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
