Polypyrrole/nickel sulfide/bacterial cellulose nanofibrous composite membranes for flexible supercapacitor electrodes

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• 作者：Shuo Peng ; Lingling Fan ; Chengzhuo Wei ; Haifeng Bao ; Hongwei Zhang ; Weilin Xu…
• 刊名：Cellulose
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：23
• 期：4
• 页码：2639-2651
• 全文大小：3,192 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Bioorganic Chemistry
  Physical Chemistry
  Organic Chemistry
  Polymer Sciences
  
• 出版者：Springer Netherlands
• ISSN：1572-882X
• 卷排序：23

文摘

The increasing trend of portable electronic products requires the development of portable and flexible energy-storage devices, such as flexible supercapacitors. In this study, we deposited polypyrrole (PPy) and nickel sulfide (NiS) on bacterial cellulose (BC) nanofibrous membranes to be used as flexible supercapacitor electrodes. The obtained PPy/NiS/BC composite membranes are highly conductive, with the electrical conductivity up to 5.1 S cm−1. Electrochemical measurements showed that the supercapacitors based on the PPy/NiS/BC electrodes have a high specific capacitance of 713 F g−1 with a power density of 39.5 W kg−1 and an energy density of 239.0 Wh kg−1 at a current density of 0.8 mA cm−2. With increasing current density from 0.2 to 1.6 mA cm−2, the corresponding capacitance changes from 884 to 569 F g−1. The presence of NiS is found to considerably improve the capacitance performance.KeywordsPolypyrroleNickel sulfideBacterial celluloseNanofibrous membranesFlexible supercapacitor electrodes