Figure 2. Schematic illustration of a lithium-ion battery’s fully charged negative electrode (left); of a lithium-ion supercapacitor (middle); of a graphene-based lithium-ion supercapacitor (right)

From

Graphene – Exciting Insights into the Synthesis and Chemistry of the Miracle Material of the 21st Century and Its Implementation in Chemistry Lessons for the First Time

Andreas Schedy, Dominik Quarthal, Marco Oetken

World Journal of Chemical Education. 2018, 6(1), 43-53 doi:10.12691/wjce-6-1-8