超级电容器
水热碳化
碳化
碳纤维
纤维素
材料科学
电容
化学工程
无机化学
化学
电化学
复合数
复合材料
电极
工程类
扫描电子显微镜
物理化学
作者
Xuli Ma,Bo Zhang,Zhixiang Xu,Yi Tan,Bin Li,Yongcai Zhang,Guo-Song Ni,Weiyou Zhou,Rafael Luque,Huiyan Zhang
标识
DOI:10.1016/j.jclepro.2022.133903
摘要
N-carbon material was prepared via ammonium nitrate (AN) assisted by hydrothermal carbonization (HTC) of cellulose-derived N-carbon materials to improve the electrochemical properties of supercapacitors. The N-carbon constructed electrode possessed a high specific capacitance of 318 F/g at 1 A/g, excellent cycling stability with 98% capacitance retention after 10,000 cycles, as well as enhanced rate capability in symmetric supercapacitor. During HTC, the improved electrochemical performance was decisively determined by the uniquely designed nitrogen supply, acidic catalyst, and powerful oxidant. Moreover, improving hydrolysis of cellulose to enhance carbonization and high nitrogen doping content of the prepared N-carbon material were the key factors contributing to its improved electrochemical properties. These findings improve the understanding of how cellulose appropriately is oxidant assisted HTC to produce N-carbon for applications in high-energy-density supercapacitors.
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