In Li 0-1 VO 2 vs Li 0-1 VS 2 the low cell voltage is purely achieved by means of inductive effect [44] on the materials' Fermi levels, the sulphide having a lower one and behaving as NEAM: an elegant solution to the low voltage problem. A similar phenomenon is highlighted in Li 0-2 V(CO 3 ) 2 vs Li 0-1 VS 2 yielding a lower cell voltage than the couple oxide-sulphide although reducing V with two electrons instead of one.