N和O共掺杂碳电极材料的制备及其组装的超级电容器的性能  

Preparation of N and O Co-doped Carbon Materials by Salt Sealing Method for Electrode of Supercapacitors

作　　者：原新忠 王存景[2] 姚鹏[2] 李琼[3] 马志华 李鹏发 YUAN Xinzhong;WANG Cunjing;YAO Peng;LI Qiong;MA Zhihua;LI Pengfa(Medical college,Xinxiang University,Xinxiang 453003,China;School of Chemistry and Materials Engineering,Xinxiang University,Xinxiang 453003,China;School of Pharmacy of Xinxiang University,Xinxiang University,Xinxiang 453003,China)

机构地区：[1]新乡学院医学院,新乡453003 [2]新乡学院化学与材料工程学院,新乡453003 [3]新乡学院药学院,新乡453003

出　　处：《材料研究学报》2024年第7期529-536,共8页Chinese Journal of Materials Research

基　　金：国家自然科学基金(51902278,51871190,51901200)。

摘　　要：用盐密封法高温热解2-甲基咪唑锌盐(ZIF-8)制备了N、O共掺杂碳电极材料,这种碳材料具有开口空心结构,其中的介孔和微孔的分布适宜且比表面积(1589 m^(2)·g^(-1))较高。N和O异质原子的掺杂改善了材料的浸润性,开口空心结构便于电解质离子从内外表面同时向电极材料内部扩散,使更多的溶剂化离子在电极材料的孔内进行吸脱附反应,增大了电极材料的有效比表面积和使更多的N、O异质原子活性位参与氧化还原反应,构成了更高的法拉第电容。用这种电极材料组装的对称超级电容器功率密度为250 W·kg^(-1)时其能量密度为11 Wh·kg^(-1)。N and O co-doped carbon electrode materials were synthesized by pyrolysis of Zeolitic Imidazolate Framework-8(ZIF-8)at high temperature in air using a salt-sealing technique,aiming to solve the issue related with the low energy density of conventional carbon materials for supercapacitors.Compared with the conventional carbon materials prepared by direct pyrolysis of ZIF-8 in nitrogen atmosphere,the novel carbon materials prepared by this proposed technique have an open hollow structure with appropriate distribution of mesoporous and microporous,and higher specific surface area of 1589 m^(2)·g^(-1).The co-doping of heteroatoms N and O can improve the wettability of the material,while the open hollow structure is conducive to the diffusion of the electrolyte ions from both internal and external surfaces to the interior of the electrode material.Therefore,more solvated ions are adsorbed and desorbed in the pores,and the effective specific surface area is increased for the electrode material,therewith,more active sites of heteroatoms N and O can participate in the redox reaction,introducing higher Faraday capacitance.As a matter of course,the symmetrical supercapacitor assembled with the novel electrode material shows an energy density of 11 Wh·kg^(-1)at power density of 250 W·kg^(-1).

关 键 词：无机非金属材料 超级电容器 盐密封法 开口空心碳材料 

分 类 号：O646[理学—物理化学]