▎ 摘　　要

Despite its high theoretical capacity of 936 mAhg(-1), when applied as anodes in lithium-ion batteries, manganese oxide, hausmannite(Mn(3)o(4)) face many practical difficulties due to its poor intrinsic electrical conductivity, huge volume expansion, and pulverization during repetitive charge/discharge cycling processes etc. In this manuscript, we report a simple, fast and facile microwave technique for synthesis of Mn3O4 embedded in three dimensional nitrogen doped graphene-carbon nanotube network. Our newly developed technique not only effectively reduces graphene oxide but also results in growth of nitrogen doped carbon nanotubes on graphene substrate to give unique mesoporous, 3-D hierarchical carbon nano-architectures. When applied as negative electrode in lithium-ion batteries, our 3D graphene-carbon nanotube hybrids exhibit high capacity of 1337 mAhg(-1) even after 300 cycles. (C) 2016 Elsevier B.V. All rights reserved.