Indeed. From the perspective of battery chemistry technology this paper is utterly unremarkable. But then that's not what it is about. The breakthrough is (ove

Indeed. From the perspective of battery chemistry technology this paper is utterly unremarkable. But then that's not what it is about. The breakthrough is (oversimplifying here) that they invented a way to whack a bog-standard smartphone battery into the middle of a bunch of layers of building material, such that about 20% of the weight of the end product is battery, whilst the material is still strong enough to not cause a Samsung Galaxy Note style oopsie when structurally compromised, and to be strong enough to build with, and to have some of the mass of the battery improve the structural integrity of the whole, even. The idea being: Take your tesla. Take the batteries out. Smash em to paste. Remove ~20% of the atoms from the chassis materials and replace them with your paste. Voila - made your car 20% lighter.