Hierarchical cellulose-derived carbon nanocomposites for electrostatic energy storage

15th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Kuzmenko, V.^1,2 ; Saleem, A.M.^1,3 ; Bhaskar, A.^1 ; Staaf, H.^1 ; Desmaris, V.^1,3 ; Enoksson, P.^1,2

Department of Microtechnology and Nanoscience, Chalmers University of Technology, Kemivägen 9, S-Gothenburg

SE-41296, Sweden^1

Wallenberg Wood Science Center, Chalmers University of Technology, Kemivägen 4, S-Gothenburg

SE-41296, Sweden^2

Smoltek AB, Regnbågsgatan 3, S-Gothenburg

SE-41755, Sweden^3

关键词: Composite electrode;    Continuous deliveries;    Effective solution;    Electrostatic charges;    Electrostatic energies;    Galvanostatic charge discharges;    Specific capacitance;    Supercapacitor electrodes;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/660/1/012062/pdf
DOI  :  10.1088/1742-6596/660/1/012062

来源: IOP

【 摘 要 】

The problem of energy storage and its continuous delivery on demand needs new effective solutions. Supercapacitors are viewed as essential devices for solving this problem since they can quickly provide high power basically countless number of times. The performance of supercapacitors is mostly dependent on the properties of electrode materials used for electrostatic charge accumulation, i.e. energy storage. This study presents new sustainable cellulose-derived materials that can be used as electrodes for supercapacitors. Nanofibrous carbon nanofiber (CNF) mats were covered with vapor-grown carbon nanotubes (CNTs) in order to get composite CNF/CNT electrode material. The resulting composite material had significantly higher surface area and was much more conductive than pure CNF material. The performance of the CNF/CNT electrodes was evaluated by various analysis methods such as cyclic voltammetry, galvanostatic charge-discharge, electrochemical impedance spectroscopy and cyclic stability. The results showed that the cellulose-derived composite electrodes have fairly high values of specific capacitance and power density and can retain excellent performance over at least 2 000 cycles. Therefore it can be stated that sustainable cellulose-derived CNF/CNT composites are prospective materials for supercapacitor electrodes.