期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 630, 期 -, 页码 525-534出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2022.10.037
关键词
CuO; Cu@C; N-doped porous carbon; Chitosan; Supercapacitor
In this study, CuO/Cu heterojunction-based composite electrode materials were developed to address the issues of poor electron transfer capacity, loading amount, and cycling stability of copper oxide. The resulting composite showed excellent electrochemical performance and achieved a high specific capacitance and cycling stability, paving the way for transition metal oxide-based electrode materials.
Copper oxide (CuO) and copper (Cu) have been viewed as the prospective pseudocapacitive electrode materials for supercapacitors. Nevertheless, the poor electron transfer capacity, loading amount, and cycling stability limit their wide applications, which can be addressed by developing the CuO based heterojunction on conductive carbons. Here, a CuO/Cu@C comprising CuO/Cu nanoflowers and chitosan-derived N-doped porous carbon was compounded by simple mechanical mixing, freeze-drying, and carbonization. The composite heated at 700 degrees C exhibited a high specific capacitance of 2479F/g at 0.5 A/g and excellent cycling stability with capacitance retention of 82.43 % after 10 000 charge-discharge cycles. In addition, the asymmetric supercapacitor (ASC), i.e., CuO/Cu@C-700//AC assembled by CuO/Cu@C (as a positive electrode) and activated carbon (AC, as a negative electrode) dis-played a great energy density of 76.87 W h kg-1 at 374.5 W kg-1 and kept as high as 25.83 W h kg-1 even at 14998 W kg-1. Our work provides a new pathway to preparing transition metal oxide-based electrode materials with distinguished electrochemical performances.(c) 2022 Published by Elsevier Inc.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据