The exploration of electrode materials in the paradigm of battery research has been shifting towards finding materials that are completely renewable, do not contain any transition metals, and are readily available. Recently, we have explored using pure polycyclic aromatic hydrocarbons (PAHs) as electrode materials for dual-ion batteries, where for the first time we demonstrated a crystalline coronene electrode showing flat plateaus at around 4.1 V in charge and discharge in a standard alkyl carbonate electrolyte. A voltage of 4.1 V avoids the use of expensive ionic liquids that are used with the conventional graphite anion insertion electrodes, which insert anions at much higher voltages of above 5.0 V. This electrode delivers a reversible discharge capacity of ~ 40 mA h g^-1. We have further demonstrated that perylene and triphenylene, both PAH crystalline solids, exhibit even higher capacities than coronene, ~80 and ~100 mA h g^-1, respectively. We are striving to investigate and identify a trend to elucidate structure-property relationships of PAHs that we believe can create a paradigm shift in dual-ion batteries based on pure hydrocarbons as the electrode materials.