Solvent self-doping synthesis of nitrogen/oxygen co-doped porous carbon from cellulose as high performance material
Zheng Yang1, Xiaonan Li2, Mengjie Zhang1
1Engineering Research Center of Biomass Conversion and Pollution Prevention of Anhui Educational Institutions, Biomass Oligosaccharides Engineering Technology Research Center of Anhui Province, Anhui Provincial Key Laboratory of Green Carbon Chemistry, School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang 236037, PR China.
Abstract:
Developing novel heteroatoms co-doped biomass porous carbon with low-cost, tunable physical/chemical properties, and environmental friendliness is an important candidate to face energy shortage and environmental pollution currently. Herein, a novel solvothermal avenue was designed using triethanolamine as self-doping solvent to treat rice straw powders with KOH. The rice straw with triethanolamine derived carbon (RSTCs-1) possessed hierarchical porous structure, N/O diatomic doping, and large specific surface area. The electrochemical energy storage performance of RSTCs-1 was evaluated in the systems of supercapacitors, aqueous zinc ion hybrid supercapacitors (AZHSs), and lithium-ion batteries (LIBs) respectively. As the results, the RSTCs-1 based symmetric supercapacitor exhibited the maximum energy density of ca. 98.4 Wh·kg-1 with the excellent cycling stability. Moreover, both RSTCs-1 AZHSs and RSTCs-1 LIBs achieved the relative high discharge specific capacities of ca. 407.1 and 1906.7 mAh·g-1 at current density of 0.1 A·g-1. These results highlighted the huge potential of the obtained with notable electrochemical performance acting as multifunctional electrode material for the different energy storage devices.
