Sulfonate-bearing mesoporous silica particles have been synthesized by grafting an alkyl sulfonate to the surface and the inner pore walls of mesoporous silica prepared via sol-gel methods. Solid lithium conductors were prepared by inserting varying amounts of oligomeric polyethylene oxide, PEO, along the alkyl sulfonates. These nanoparticles were then blended with a lithium solvating PEO-grafted polyethyleneimine, PNE, to produce flexible self-standing films. The ionic conductivity can be controlled by tuning the O/Li ratio within the silica mesopores, changing the pore size distributions, and by changing the relative amounts of silica particles to PNE in the hybrid films. Optimized hybrid film compositions exhibited lithium conductivities above 0.5 mS/cm at room temperature, indicating that both ion transport and ion-pair dissociation benefit from mesopore nanoconfinement. Insights from 2D correlation <sup>7</sup>Li-NMR experiments and preliminary battery tests will be discussed.

Solid electrolytes for lithium-ion batteries from polymer/sulfonated mesoporous silica composites, effects of nanoconfinement and matrix polarity on ion transport

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.