The aggregate-of-spheres ('Kugelhaufen') model of the PbO 2/PbSO 4 Electrode Winsel, A. ; Voss, E. ; Hullmeine, U. Abstract Publication: Journal of Power Sources Pub Date: 1990 DOI: 10.1016/0378-7753(93)80078-4 Bibcode: 1990JPS....30..209W