Co0.85Se nanosheets assembled layer by layer on N-doped carbon nanosheets ([email protected]) are designed and fabricated through a facile solvothermal process. The hexamethylenetetramine as the solvent and complexing agent promotes the accumulation of Co0.85Se layer by layer. The long chain diethylenetriamine between the Co0.85Se nanosheets provides buffer space and nanochannels for accelerating the Li+ transportation. The N-doped carbon nansheets in [email protected] provide effective conductive network during charge-discharge process. As an anode material for lithium-ion batteries, the [email protected] nanocomposites deliver a high specific capacity of 636 mAh g(-1) after 100 cycles at current density of 200 mA g(-1), and 399 mAh g(-1) for 500 cycles at high current density of 5000 mA g(-1). (C) 2020 Elsevier Inc. All rights reserved.