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基于环糊精支化聚合物的多孔碳制备及其超电容储能机理研究

批准号51602202 学科分类无机非金属能量存储材料 ( E021002 )
项目负责人邓立波 负责人职称讲师 依托单位深圳大学
资助金额20.00
万元
项目类别青年科学基金项目 研究期限2017 年 01 月 01 日 至
2019 年 12 月 31 日
中文主题词孔结构;支化聚合物;环糊精;超电容储能机理
英文主题词Pore structure;Branched polymer;Cyclodextrin;Mechanism for capacitive energy storage

摘要

中文摘要 超级电容器是一种兼具高功率密度与良好循环稳定性的电化学储能装置,提高其能量密度的关键在于改善电极材料的性能。多孔碳材料已经被广泛应用于商业超级电容,然而其电容性能仍然有巨大的提升空间,深刻理解电解质与各类型孔的相互作用并有效调控孔结构对于提升性能至关重要。本项目拟采用环糊精为支化点、通过交联反应构筑多孔支化聚合物,继而将其碳化,以牺牲桥联链段而保留环糊精单元形成的碳微晶来制备新型三维多孔碳材料。通过改变交联剂分子链段的刚性、长度与支化度有效调节聚合物的孔隙率进而精确调控其裂解碳的孔结构,并以其为电极材料制备高性能超级电容器。进一步采用固体核磁共振技术研究电解质在微孔与小介孔中的静电吸附过程,阐明碳材料的孔结构与其电容性能之间的关系,为提高碳材料储能性能及推动其工程化应用提供理论依据和基础实验数据。
英文摘要 Supercapacitor is an electrochemical energy storage device that possesses both high power density and excellent cyclic stability. The key to increase the energy density of supercapacitors is to improve the performance of the electrode materials. Porous carbon materials have been extensively used in commercial supercapacitors but there is still great potential for improvement of their capacitive performance. To this end, it is important to understand deeply the interaction between electrolytes and different types of pores and to tune the pore structure effectively. In this project, porous branched polymers will be constructed by cross linking reaction and using cyclodextrin (CD) as the branching unit. The polymer will be carbonized through which the bridging units are sacrificed and the CD units are converted into carbon microcrystallites at the branching points, resulting in novel three-dimensional porous carbons. The porosity of the CD polymers and the pore structure of the resultant carbons will be precisely tuned by changing the rigidity, length and branching degree of the molecular chains for the cross-linking agents. The as-synthesized porous carbons will be used as electrodes to fabricate high-performance supercapacitors. Furthermore, solid nuclear magnetic resonance will be used to study the electrostatic adsorption process of electrolytes in micropores and small mesopores and to elaborate the relationship between the pore structure and the capacitive performance. These work would provide theories and fundamental data, and consequently to imperove the performance and foster the industrial applications of carbon materials for energy storage.
结题摘要

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