标题：Nitrogen/oxygen co-doped monolithic carbon electrodes derived from melamine foam for high-performance supercapacitors
作者：Zhang, Rui; Jing, Xiangxia; Chu, Yanting; Wang, Lei; Kang, Wenjun; Wei, Denghu; Li, Haibo; Xiong, Shenglin
作者机构：[Zhang, Rui; Jing, Xiangxia; Wang, Lei; Kang, Wenjun; Li, Haibo] Liaocheng Univ, Sch Chem & Chem Engn, Liaocheng 252059, Peoples R China.; [Chu, Yan 更多
通讯作者：Li, HB;Xiong, SL;Li, HB;Li, Haibo
通讯作者地址：[Li, HB]Liaocheng Univ, Sch Chem & Chem Engn, Liaocheng 252059, Peoples R China;[Xiong, SL]Shandong Univ, Sch Chem & Chem Engn, Minist Educ, Key Lab C 更多
来源：JOURNAL OF MATERIALS CHEMISTRY A
摘要：A novel monolithic carbon sponge is prepared by a ZnCl2-assisted carbonization of commercial melamine foam (MF) at 800 degrees C in a N-2 atmosphere. The as-prepared nitrogen/oxygen co-doped carbon sponges (NOCSs) can be directly applied as monolithic electrodes for supercapacitors without using any additives. It is found that ZnCl2 activation plays an important role in improving the supercapacitive behavior of NOCSs. Compared with the NOCS without ZnCl2 activation treatment, the optimal NOCS-1/10, obtained with a ZnCl2/MF weight ratio of 1:10, has the best capacitive performance due to its unique porous architecture, rich pseudocapacitance-active species, and good electron/ion transfer feature. It exhibits a high specific capacitance (242 F g(-1) at a current density of 0.5 A g(-1) and 325 F g(-1) at a scan rate of 10 mV s(-1)) and good electrochemical cyclability (97% after 10000 cycles at 5.0 A g(-1)). When being further assembled into an all-solid-state supercapacitor (PVA/KOH electrolyte), it can deliver an energy density of 4.33 W h kg(-1) at a power density of 250 W kg(-1) and 3.13 W h kg(-1) at a power density of 3 kW kg(-1).