batteries convert chemical energy to electrical energy. Of the various types, magnesium battery combine the benefits of inexpensive, environmentally and safe to handle. However, the development of Magnesium battery has been hindered by obstacle. A key obstacle is poor activity of traditional cathode materials for intercalating Mg ions. Here, we propose GeO2 as a new cathode material for high performance magnesium battery. The influence of graphene additives on the structure, thermal and electrical properties of GeO2 have been examined. The conductivity, as measured by I–V techniques higher than that of unmodified GeO2. X-ray investigations showed graphene accumulation in the inter-granular regions. The excellent physicochemical performance of GeO2/GNP nano-composites can be attributed to their unique structures, which intimately combine the conductive GNP network with GeO2 and possess the characteristic parallel channels running along the  orientation, which allow easy Mg+2 transport. A prototype cell is constructed based-Mg anode and (GeO2)0.7/(GNP)0.3 cathode. The Mg/GeO2 cell shows promising cycling behavior.