Manuscript: Increased Li-ion pore access through oxidation + surfactant passivation

The following documents are a manuscript and supporting information that outlines the methodology and electrochemical effects of partially graphitized and surfactant passivated activated carbon electrodes. Due to the increased electrochemical pore access from the chemical graphitization procedure outlined in “Partial Graphitization of Activated Carbon by Surface Acidification” combined with covalent bonded surfactant passivation of surface oxygen groups on the outermost pore edges, Li-insertion electrodes are shown to have over a 1000% increase in their reversible loading capacity after 50 charge/discharge cycles. The effectiveness of the graphitization + passivation tandem treatment is shown to be dependent on the activated carbon’s inherent density of total acidity–where too high of a density diminishes the electrochemical loading effect of the treated carbon substrate. The composition and structural integrity of the solid electrolyte interface (SEI) is shown to be significantly homogeneous and stronger, respectively, for optimally oxidized + surfactant treated electrodes. These optimal physical/chemical properties of the evolved SEI layer are shown to be attributed to a cleaner, more open, water-free surface that strongly promotes the formation of lithium ethylene dicarbonate SEI while suppressing the formation of SEI products such as pore-impeding propylene glycol precipitation as well as the¬†commonly observed lithium carbonate.

Increased Li-ion pore access through development of lithium ethylene dicarbonate SEI by passivation of oxidized amorphous carbon electrode with fluorosurfactant

Increased Li-ion pore access through development of lithium ethylene dicarbonate SEI by passivation of oxidized amorphous carbon electrode with fluorosurfactant (sup info)