What if your battery served also as a wing or a fuselage? Several current efforts converge on creating batteries or supercapacitors that could function as structural elements in electric vehicles. We’ve reported on this before, with efforts by Dr. Emil Greenhalgh at Imperial College London and associated work by Volvo to make car components from the type of energy storing sandwich structure he developed. Your editor’s article on the “Grand Unified Airplane” in the July 2013 issue of Kitplanes magazine advanced the idea that such structures, coupled with graphene’s projected capabilities to collect solar energy, could lead to a self-powering aircraft. (In researching the current entry, he found that his idea had been done at model scale by BAE.) Reports from two universities show that others are working toward making that dream less than an idle fantasy. Researchers at Vanderbilt University are making headway toward creating a “Multifunctional Load-Bearing Solid-State Supercapacitor,” as titled in the American Chemical Society’s journal, Nano …