The preparation of porous carbon materials and its application in the supercapacitor

来源 :第31届全国化学与物理电源学术年会 | 被引量 : 0次 | 上传用户:dracula1103
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  Due to the controllable pore structure and surface chemical properties,porous carbon materials are widely used on catalysis,absorption,sensor,electrochemistry et al.In this research,we synthesized hierarchical macro-mesoporous carbon used as electrode materials for electrical double-layer capacitors(EDLCs),where the glucose acted as the carbon source and Mn(NO3)2 as the pore-forming agent and then annealed at different temperatures.The electrode exhibits a specific capacitance of 238 F g-1 at 0.5 A g-1in a 6 M KOH aqueous solution and its suitable for charge-discharge operation even at the current density of 10 A g-1 coupled with a capacitance of 220 F g-1,indicating excellent high-rate electrochemical performance.The electrochemical capacitance of the electrode has a high retention of 90.9%after 5000 cycles at 10 A g-1,which implies a good electrochemical cycle life.Our work demonstrated that hierarchical porous carbon continue to show potential for use in specific electrochemical applications.As shown from figure 1,the electrode exhibits a specific capacitance of 238 F g-1 at 0.5 A g-1in a 6 M KOH aqueous solution and its suitable for charge-discharge operation even at the current density of 10 A g-1 coupled with a capacitance of 220 F g-1,indicating excellent high-rate electrochemical performance.Plots of cyclic voltammetry data with the capacitor electrode made from this carbon showed an almost rectangular curve.The electrochemical capacitance of the electrode has a high retention of 90.9%after 5000 cycles at 10 A g1,which implies a good electrochemical cycle life.In this research,we synthesized hierarchical macro-mesoporous carbon used as electrode materials for electrical double-layer capacitors(EDLCs),the electrode exhibits good electrochemical performance.Our work demonstrated that hierarchical porous carbon continue to show potential for use in specific electrochemical applications.In terms of the porous carbon material,the relationship between pore structure and super capacitor performance still needs further exploration to understand mechanism clearly.
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