Revisiting metal fluorides as lithium-ion battery cathodes by Hua, X, Eggeman, AS, Castillo-Martínez, E, Robert, R, Geddes, HS, Lu, Z, Pickard, CJ, Meng, W, Wiaderek, KM, Pereira, N, Amatucci, GG, Midgley, PA, Chapman, KW, Steiner, U, Goodwin, AL, Grey, CP