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Hierarchical cellulose- derived CNF/CNT composites for electrostatic energy storage

Volodymyr Kuzmenko (Institutionen för mikroteknologi och nanovetenskap, Elektronikmaterial och system ) ; Amin M Saleem (Institutionen för mikroteknologi och nanovetenskap, Elektronikmaterial och system ) ; Henrik Staaf (Institutionen för mikroteknologi och nanovetenskap, Elektronikmaterial och system ) ; Mohammad Mazharul Haque (Institutionen för mikroteknologi och nanovetenskap, Elektronikmaterial och system ) ; Arun Bhaskar (Institutionen för mikroteknologi och nanovetenskap, Elektronikmaterial och system ) ; M. Flygare ; K. Svensson ; V. Desmaris ; Peter Enoksson (Institutionen för mikroteknologi och nanovetenskap, Elektronikmaterial och system )
Journal of Micromechanics and Microengineering (0960-1317). Vol. 26 (2016), 12, p. 124001.
[Artikel, refereegranskad vetenskaplig]

Today many applications require new effective approaches for energy delivery on demand. Supercapacitors are viewed as essential energy storage devices that can continuously provide quick energy. The performance of supercapacitors is mostly determined by electrode materials that can store energy via electrostatic charge accumulation. This study presents new sustainable cellulose-derived composite electrodes which consist of carbon nanofibrous (CNF) mats covered with vapor-grown carbon nanotubes (CNTs). The CNF/CNT electrodes have high electrical conductivity and surface area: the two most important features that are responsible for good electrochemical performance of supercapacitor electrodes. The results show that the composite electrodes have fairly high values of specific capacitance (101 F g(-1) at 5 mV s(-1)), energy and power density (10.28 W h kg(-1) and 1.99 kW kg(-1), respectively, at 1 A g(-1)) and can retain excellent performance over at least 2000 cycles (96.6% retention). These results indicate that sustainable cellulose-derived composites can be extensively used in the future as supercapacitor electrodes.

Nyckelord: supercapacitors, carbon nanocomposite, electrodes, cellulose



Denna post skapades 2016-11-16. Senast ändrad 2017-01-16.
CPL Pubid: 245282

 

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