模板和发泡双策略制备氮掺杂介孔碳材料及电化学性能OA
Dual-engineering Preparation and Electrochemical Properties of Nitrogen-doped Mesoporous Carbon Materials
以尿素作为氮源,聚乙烯吡咯烷酮为碳源,同时利用硬模板法和发泡双策略在不同预活化温度(90℃、140℃、180℃和 250℃)下探究前驱体缩合反应程度.通过SEM对其形貌分析,通过BET分析不同的发泡温度对孔径的影响,进而探究其作为电极材料的电化学性能.结果表明,在预活化温度为 180℃的条件下煅烧的NPCNs样品呈三维网状形貌,拥有较高的比表面积且伴随着丰富的分级多孔结构.同时,NPCNs的导电性高,电化学性能良好,在 1 mV/s的扫速下比电容高达 382 F/g,即使在 2 A/g的电流密度下经过 1000 次循环后仍保持近 100%的容量保持率,放电比容量能达到 302 F/g.
The extent of precursor condensation reaction was explored at different pre-activation temperatures(90℃,140℃,180℃and 250℃)using urea as nitrogen source and polyvinylpyrrolidone as carbon source via hard template method and foaming strategy.The morphology was analyzed by SEM,and the effect of different foaming temperatures on pore size was analyzed by BET to explore their electrochemical performance as electrode materials.The results show that the calcined NPCNs samples at the pre-activation temperature of 180℃have a three-dimensional network morphology,high specific surface area and rich hierarchical porous structure.Meanwhile,the NPCNs exhibited good electrochemical performance and high electrical conductivity,with a specific capacitance as high as 382 F/g at a sweep rate of 1 mV/s.Even at a current density of 2 A/g,the NPCNs possessed a capacity retention of nearly 100% after 1,000 cycles,and a discharge specific capacity as high as 302 F/g.
王鸿志;白雪;苏文君;高源;王卓
上海理工大学 材料与化学学院,上海 200093
化学工程
发泡法氮掺杂介孔碳材料超级电容器电极电化学性能
foaming strategynitrogen-dopedmesoporous carbon materialsupercapacitorelectrodeelectrochemical performance
《广州化学》 2024 (003)
31-35 / 5
国家青年科学基金项目(22209114)
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