Activation-induce d bowl-shape d nitrogen and oxygen dual-doped carbon material and its excellent supercapacitance  

作　　者：Junyan Wang Xinta Li Wanchun Guo Kesong Tian Jiamin Zhang Bosen Zhang Xueai Li Haiyan Wang 

机构地区：[1]Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse,State Key Laboratory of Metastable Materials Science and Technology,School of Environmental and Chemical Engineering,Yanshan University,Qinhuangdao 066004,China

出　　处：《Journal of Materials Science & Technology》2023年第29期1-8,共8页材料科学技术（英文版）

基　　金：the National Natural Science Foundation of China(No.52202048);the Hebei Natural Science Foundation(Nos.E2022203082 and B2021203012);the Department of Education of Hebei Province(No.QN2021140).

摘　　要：Porous heteroatom-doped carbon materials exhibit promising electrochemical applications because of tunable porous structure and doping heteroatom-induced charge redistribution.Nevertheless,it is still a great challenge to develop porous heteroatom-doped carbon materials with both high-content active heteroatom species and facilitated diffusion route.Herein,we report a bowl-shaped nitrogen and oxygen dual-doping carbon(N,O-doped carbon)material based on low-temperature defluorination pyrolysis and alkali-etched activation of 3-fluorophenol-3-amino-4-hydroxypyridine-formaldehyde co-condensed resin and its excellent supercapacitance.This low-temperature thermal treatment strategy ensures high-content pyrrolic nitrogen(4.6 at.%)and oxygen species(15.9 at.%)to avoid high-temperature treatment-induced heteroatom loss and undesired configuration conversion.In these processes,the defluorination pyrolysis promotes the transformation from the resin to carbon material to some extent,and KOH activation also promotes the ordered arrangement of 002 planes,which together assure the appropriate conductivity of the final microporous carbon material.More importantly,KOH-etched activation partially removes an un-stable nano/microscale domain of the intermediate carbon microspheres to form a unique bowl-shaped structure extremely facilitating the diffusion of the substitutes and/or electrolyte ions.As expected,N,O-doped carbon material displays a remarkable specific capacitance of 486.4 F g^(−1)at 1 A g^(−1)with nitro-gen/oxygen species-dependant pseudocapacitance and good electrochemical durability.

关 键 词：N O-doped carbon Bowl-shaped structure Low-temperature pyrolysis Alkali activation SUPERCAPACITANCE 

分 类 号：TQ127.11[化学工程—无机化工] TM53[电气工程—电器]