摘要
多孔炭材料的孔结构和表面化学性质是影响双电层电容器电化学性能的关键因素。据此,以天然椴木废渣为炭源,采用水热、炭化以及氢氧化钾活化制备高性能氮掺杂分级孔炭(NPC)材料。通过调节氨水溶液的质量分数有效调控NPC的孔结构和氮原子数分数。当氨水溶液质量分数为15%时,所制备的NPC15比表面积为2370 m^(2)/g,氮原子数分数为3.13%。其电化学性能测试结果表明,当充放电电流密度为0.5 A/g时,NPC15具有较高的比电容(223.5 F/g)和优异的循环稳定性,循环5000次后其比电容保持率高达93%。研究结果表明制得的材料在储能领域具有良好的应用前景。
The pore structure and surface chemistry properties of porous carbons are key factors affecting the electrochemical performance of the double-layer capacitor.Accordingly,with the waste residue of the natural basswood as the carbon source,the nitrogen-doped hierarchical-structured porous carbons(NPCs)material was prepared by the hydrothermal method,carbonization and potassium hydroxide activation.The porous structure and nitrogen atomic number fraction of NPCs can be effectively regulated by adjusting the mass fraction of ammonia solution.And when the mass fraction of ammonia solution is 15%,the specific surface area and nitrogen number fraction of the prepared NPC15 are 2370 m^(2)/g and 3.13%,respectively.The test results of electrochemical properties show that NPC15 has a higher specific capacitance of 223.5 F/g at a charge and discharge current density of 0.5 A/g and exceptional cycling stability,its specific capacitance retention rate is up to 93%after 5000 cycles.The research results indicate that the prepared material has a promising application prospect in the field of energy storage.
作者
程存喜
刘琴
杨凤娟
Cheng Cunxi;Liu Qin;Yang Fengjuan(Higher Educational Key Laboratory for Flerible Manufacturing Equipment Integration of Fujian Province,Xiamen Institute of Technology,Xiamen 361021,China;State Key Laboratory for Manufacturing Systems Engineering,Xian Jiaotong University,Xian 710049,China)
出处
《微纳电子技术》
CAS
北大核心
2022年第7期636-643,共8页
Micronanoelectronic Technology
基金
福建省中青年教师教育科研资助项目(JAT190951)
福建省高校杰出青年科研人才培育计划(2018)
2020年度厦门工学院先进功能材料科研创新团队项目(KYTD202004)
机械制造系统工程国家重点实验室(西安交通大学)开放课题(SKLMS2019001)。
关键词
超级电容器
水热法
分级孔炭
氮掺杂
储能
supercapacitor
hydrothermal method
hierarchical-structured porous carbon
nitrogen-doping
energy storage
