{"title":"Dual-Silica Template-Mediated Synthesis of Nitrogen-Doped Mesoporous Carbon Nanotubes for Supercapacitor Applications","authors":"Qian Zhang, Chao Deng, Zaimei Huang, Qingcheng Zhang, Xiaocheng Chai, Deliang Yi, Yuanyuan Fang, Minying Wu, Xingdong Wang, Yi Tang, Yajun Wang","doi":"10.1002/smll.202205725","DOIUrl":null,"url":null,"abstract":"<p>1D carbon nanotubes have been widely applied in many fields, such as catalysis, sensing and energy storage. However, the long tunnel-like pores and relatively low specific surface area of carbon nanotubes often restrict their performance in certain applications. Herein, a dual-silica template-mediated method to prepare nitrogen-doped mesoporous carbon nanotubes (NMCTs) through co-depositing polydopamine (both carbon and nitrogen precursors) and silica nanoparticles (the porogen for mesopore formation) on a silica nanowire template is proposed. The obtained NMCTs have a hierarchical pore structure of large open mesopores and tubular macropores, a high specific surface area (1037 m<sup>2</sup> g<sup>−1</sup>), and homogeneous nitrogen doping. The NMCT-45 (prepared at an interval time of 45 min) shows excellent performance in supercapacitor applications with a high capacitance (373.6 F g<sup>−1</sup> at 1.0 A g−<sup>1</sup>), excellent rate capability, high energy density (11.6 W h kg<sup>−1</sup> at a power density of 313 W kg<sup>−1</sup>), and outstanding cycling stability (98.2% capacity retention after 10 000 cycles at 10 A g<sup>−1</sup>). Owing to the unique tubular morphology, hierarchical porosity and homogeneous N-doping, the NMCT also has tremendous potential in electrochemical catalysis and sensing applications.</p>","PeriodicalId":228,"journal":{"name":"Small","volume":"19 12","pages":""},"PeriodicalIF":13.0000,"publicationDate":"2022-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"12","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Small","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/smll.202205725","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 12
Abstract
1D carbon nanotubes have been widely applied in many fields, such as catalysis, sensing and energy storage. However, the long tunnel-like pores and relatively low specific surface area of carbon nanotubes often restrict their performance in certain applications. Herein, a dual-silica template-mediated method to prepare nitrogen-doped mesoporous carbon nanotubes (NMCTs) through co-depositing polydopamine (both carbon and nitrogen precursors) and silica nanoparticles (the porogen for mesopore formation) on a silica nanowire template is proposed. The obtained NMCTs have a hierarchical pore structure of large open mesopores and tubular macropores, a high specific surface area (1037 m2 g−1), and homogeneous nitrogen doping. The NMCT-45 (prepared at an interval time of 45 min) shows excellent performance in supercapacitor applications with a high capacitance (373.6 F g−1 at 1.0 A g−1), excellent rate capability, high energy density (11.6 W h kg−1 at a power density of 313 W kg−1), and outstanding cycling stability (98.2% capacity retention after 10 000 cycles at 10 A g−1). Owing to the unique tubular morphology, hierarchical porosity and homogeneous N-doping, the NMCT also has tremendous potential in electrochemical catalysis and sensing applications.
一维碳纳米管在催化、传感、储能等领域有着广泛的应用。然而,碳纳米管的长孔洞和相对较低的比表面积限制了其在某些应用中的性能。本文提出了一种双二氧化硅模板介导的方法,通过在二氧化硅纳米线模板上共沉积聚多巴胺(碳和氮前体)和二氧化硅纳米粒子(形成介孔的孔隙素)来制备氮掺杂的介孔碳纳米管(NMCTs)。所制得的nmct具有大的开放介孔和管状大孔的分层孔结构,具有高的比表面积(1037 m2 g−1)和均匀的氮掺杂。NMCT-45(制备时间间隔为45 min)在超级电容器应用中表现出优异的性能,具有高电容(在1.0 a g−1时为373.6 F g−1)、优异的倍率能力、高能量密度(在功率密度为313 W kg−1时为11.6 W h kg−1)和出色的循环稳定性(在10 a g−1下循环10000次后容量保持率为98.2%)。由于其独特的管状结构、分层孔隙度和均匀的n掺杂,NMCT在电化学催化和传感方面也具有巨大的应用潜力。
期刊介绍:
Small serves as an exceptional platform for both experimental and theoretical studies in fundamental and applied interdisciplinary research at the nano- and microscale. The journal offers a compelling mix of peer-reviewed Research Articles, Reviews, Perspectives, and Comments.
With a remarkable 2022 Journal Impact Factor of 13.3 (Journal Citation Reports from Clarivate Analytics, 2023), Small remains among the top multidisciplinary journals, covering a wide range of topics at the interface of materials science, chemistry, physics, engineering, medicine, and biology.
Small's readership includes biochemists, biologists, biomedical scientists, chemists, engineers, information technologists, materials scientists, physicists, and theoreticians alike.