Size-controllable synthesis of monodispersed nitrogen-doped carbon nanospheres from polydopamine for high-rate supercapacitors  

作　　者：Ning Zhang Fu-Cheng Gao Hong Liu Feng-Yun Wang Ru-Liang Zhang Qing Yu Lei Liu 

机构地区：[1]School of Materials Science and Engineering,Shandong University of Science and Technology,Qingdao 266590,China [2]College of Physics and State Key Laboratory of Bio Fibers and Eco Textiles,Qingdao University,Qingdao 266071,China

出　　处：《Frontiers of Chemical Science and Engineering》2023年第11期1788-1800,共13页化学科学与工程前沿（英文版）

基　　金：the Natural Science Foundation of Shandong Province(Grant No.ZR2019QEM005),Project of Shandong Province Higher Educational Young Innovative Talent Introduction and Cultivation Team[Environment Function Material Innovation Team].

摘　　要：Monodispersed nitrogen-doped carbon nanospheres with tunable particle size(100-230 nm)were synthesized via self-polymerization of biochemical dopamine in the presence of hexamethylenetetramine as a buffer and F127 as a size controlling agent.Hexamethylenetetramine can mildly release NH3,which in turn initiates the polymerization reaction of dopamine.The carbon nanospheres obtained exhibited a significant energy storage capability of 265 F·g^(-1)at 0.5 A·g^(-1)and high-rate performance of 82%in 6 mol·L^(-1)KOH(20 A·g^(-1)),which could be attributed to the presence of abundant micromesoporous structure,doped nitrogen functional groups and the small particle size.Moreover,the fabricated symmetric supercapacitor device displayed a high stability of 94%after 5000 cycles,revealing the considerable potential of carbon nanospheres as electrode materials for energy storage.

关 键 词：carbon nanospheres size-controlled NITROGEN-DOPED high-rate SUPERCAPACITORS 

分 类 号：TB383[一般工业技术—材料科学与工程]