Composite carbon-based ionic liquid supercapacitor for high-current micro devices

14th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications

物理学;能源学

Cowell, M.^1 ; Winslow, R.^1 ; Zhang, Q.^2 ; Ju, J.^1 ; Evans, J.^2 ; Wright, P.^1

Department of Mechanical Engineering, University of California at Berkeley, 6141 Etcheverry Hall, Berkeley

CA

94709, United States^1

Department of Materials Science and Engineering, University of California at Berkeley, 210 Hearst Mining Building, Berkeley

CA

94720, United States^2

关键词: Ambient conditions;    Carbon-based;    Composite electrode;    Energy Harvester;    Gel polymers;    High currents;    Manufacturing process;    Single cells;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/557/1/012061/pdf
DOI  :  10.1088/1742-6596/557/1/012061

来源: IOP

【 摘 要 】

Manufacture and performance of a composite carbon-based supercapacitor that employs a gel polymer ionic liquid electrolyte to achieve stable, long cycle life, high-current draw energy storage is discussed in this paper. This supercapacitor when cycled galvanostatically can achieve a discharge capacitance of 43.0 mF per square centimeter of substrate by leveraging the strengths of a composite electrode composition. The printed manufacturing process takes place in ambient conditions at room temperature enabling high-current, rechargeable energy storage to be built onto many substrates. Single-cell discharge power densities have reached 404 μW/cm2which could enable many technologies when paired with a MEMS energy harvester.