A nanoporous N-doped reduced graphene oxide(p-N-rGO) was prepared through carbothermal reaction between graphene oxide and ammonium-containing oxometalates as sulfur host for Li-S batteries.The p-N-rGO sheets have abundant nanopores with diameters of 10-40 nm and the nitrogen content is 2.65 at%.When used as sulfur cathode,the obtained p-N-rGO/S composite has a high reversible capacity of 1110mAhg~1 at 1C rate and stable cycling performance with 781.8 mAhg~1 retained after 110 cycles,much better than those of the rGO/S composite.The enhanced electrochemical performance is ascribed to the rational combination of nanopores and N-doping,which provide efficient contact and wetting with the electrolyte,accommodate volume expansion and immobilize polysulfides during cycling. A nanoporous N-doped reduced graphene oxide (pN-rGO) was prepared through carbothermal reaction between graphene oxide and ammonium-containing oxometalates as sulfur host for Li-S batteries.The pN-rGO sheets have abundant nanopores with diameters of 10-40 nm and the nitrogen content is 2.65 at% .When used as sulfur cathode, the resulting pN-rGO / S composite has a high reversible capacity of 1110mAhg ~ 1 at 1C rate and stable cycling performance with 781.8 mAhg ~ 1 retained after 110 cycles, much better than those of the rGO / S composite. The enhanced electrochemical performance is ascribed to the rational combination of nanopores and N-doping, which provide efficient contact and wetting with the electrolyte, accommodate volume expansion and immobilize polysulfides during cycling.