Nitrogen-doped porous carbon/Mn3O4 composites as anode materials for lithium-ion batteries

摘要

This study synthesized activated carbon with petroleum coke (PC) and biomass (Artemisia Hedinii) derived semi-char as raw materials and further applied it as anode materials for lithium-ion batteries (LIBs) with the loading of Mn3O4. The co-activation of PC and AH was proved to be environmentally friendly with less potassium loss compared with that for individual feedstocks. The activated carbons with/without N-doping were attempted as the carrier for the dispersion of Mn3O4 with a facile solvothermal route. The electrochemical performance test results indicated that the N-doped co-activated carbon/Mn3O4 composite delivered initial charge specific capacity of 1090 mAh/g at a current density of 100 mA/g. After 120 cycles, it still maintains a high reversible capacity of 806 mAh/g, which is prominently higher than that of the counterpart composites (PC, AH or PCAH based activated carbon/Mn3O4) and bare Mn3O4. The N-doped co-activated carbon deriving from abundant and low-cost natural waste resources is a promising candidate for high-performance anode materials of LIBs.