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Ultra‐high volumetric performance electrochemical double layer capacitors based on high density aligned nano‐porous microwave exfoliated graphite oxide have been studied. Elimination of macro‐, meso‐, and larger micro‐pores from electrodes and controlling the nano‐morphology results in very high volumetric capacitance, energy, and power density values.
The promise of aromatic, amorphous, polar polymers containing high dipolar moments with very low defect levels is demonstrated for future dielectric materials with ultrahigh electric‐energy density, low loss at high applied fields, and ultrahigh breakdown strengths. Specifically, aromatic polythiourea films exhibit an ultrahigh breakdown field (>1 GV m−1), which results in an energy density of...
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