Diode or Storage
Sorry, but this article (and maybe the press release, deliberately?) seem to miss the point. Isn't he proposing a more efficient type of diode? This isn't going to store more energy, it's going to cut the amount of energy loss in diodes (and I guess in the charging / discharging circuitry of the cell). I imagine only a small proportion of the energy of the cell is lost as heat in inefficient diodes.
Am I missing something?