超级电容器
电容
材料科学
碳化
功率密度
电化学
电极
纳米技术
碳纤维
储能
化学工程
比表面积
生物量(生态学)
复合材料
复合数
功率(物理)
化学
扫描电子显微镜
有机化学
热力学
物理
海洋学
物理化学
工程类
地质学
催化作用
作者
Liqiong Zhang,Yujie Zhang,Shenghui Jiao,Junliu Zhang,Xin Zhao,Honglei Chen,Jianchun Jiang
出处
期刊:Chemsuschem
[Wiley]
日期:2023-05-31
卷期号:16 (13)
被引量:2
标识
DOI:10.1002/cssc.202202393
摘要
Supercapacitors with the performance advantages of high-power density are emerging materials for energy storage/conversion systems that can combat climate change caused by CO2 emissions and are of importance with the development of electronic products and artificial intelligence. But rationally preparing high-performance electrode with high mass-loading quantity remains challenge. Herein, we have opted for chitosan as well-structured binding agent to combine with active carbon (SSP-900), a 3D hierarchical micro-meso-macro porous biochar previously obtained, to synthesize high mass-loading freestanding electrode. Especially, the freestanding material (C1000 G0.2 ), owning 0.2 g SSP-900 and suffering carbonization at 1000 °C exhibits high specific surface area of 389.3 cm2 g-1 , and self-doped N, O (2.75 %, 5.64 %). That awards C1000 G0.2 outstanding electrochemical properties, including high specific mass capacitance of 199.2 F g-1 , splendid specific area capacitance of 4.37 F cm-2 in 21.93 g cm-2 , which is more competitive than conventional freestanding materials. Symmetrical supercapacitor with mass loading of 12 mg is assembled and exhibits large specific capacitance of 65 F g-1 , high energy density of 32.5 Wh kg-1 under the power density of 90.4 W kg-1 , and capacitance stability of 98 % after 10,000 cycles. The distinguished electrochemical performance of freestanding electrodes supplies prospective application for storing/converting electrical energy from intermittent solar and wind.
科研通智能强力驱动
Strongly Powered by AbleSci AI