电子元件与材料2017，Vol.36Issue(3)：26-30,5.DOI:10.14106/j.cnki.1001-2028.2017.03.006
活性碳堆积密度对双电层超级电容器性能的影响
Stacking density of active carbon and its impact on edlc capacity behavior
文怀梁 1赵伟 2靳琳浩 1孟垂舟 2张继国 1郑军华 2李现化1
作者信息
- 1. 煤基低碳国家重点实验室,河北 廊坊 065001
- 2. 新奥科技发展有限公司,河北 廊坊 065001
- 折叠
摘要
Abstract
The stacking density of active materialis very important to the super capacitor cycle. The effects of stacking density of sheet during rolling process on capacity behavior were researched through the measurement of the specific capacitance, the charge and discharge characteristic curves, half discharge voltage and electrochemical impedance spectroscopy during the 5000 cycles. The results show that the specific capacitance of active carbon electrode increases firstly and then decreases with bulk density increasing. The SEM results show that the high density compresses the large stacking hole of active material layer. Electrochemical impedance tests show that higher conductive agent promotesthe formation of conductive network more effectively, thereby reducing the sheet resistance. However, higher stacking density would increase the ion diffusion resistance, which increase the cell resistance, resulting in reduced capacitance. The optimization of the bulk densityis 529×10–3g/cm3.关键词
超级电容器/活性碳/电化学阻抗谱/扣式/堆积密度/辊压Key words
super capacitor/active carbon/electrochemical impedance/coin cell/stacking density/rolling process分类
化学化工引用本文复制引用
文怀梁,赵伟,靳琳浩,孟垂舟,张继国,郑军华,李现化..活性碳堆积密度对双电层超级电容器性能的影响[J].电子元件与材料,2017,36(3):26-30,5.
