| As an ideal energy system,the rechargeable lithium-ion batteries(LIBs)are extensively applied in the field of electrical vehicles and portable devices due to their high energy density,relatively supernal working voltage,long cycling life-span and environment friendliness.In general,the anode plays a crucial role in the performance of LIBs.Therefore,it’s desirable to search for a new generation of alternative anode materials.Among various anode materials,manganese oxides have attracted more considerable attentions owing to the high theoretical capacity and abundant resource.Nevertheless,the limited cycling stability and poor electrical conductivity are the major obstacles to restrict the application of manganese oxides-based anode materials.To modify the electrochemical performance of manganese oxides-based anode materials,we utilized the Mn2O3 microsphere as precursor to synthesize Mn2O3/TiO2,MnO@NC and MnTiO3/TiO2/C composite through the facile hydrothermal-assistant liquid phase deposition(LPD),in-situ interfacial polymerization and liquid phase deposition with subsequent carbonization process,respectively.After characterized by XRD,XPS,TEM and SEM,the above-mentioned samples exhibited favorable crystalline structure and microtopography.During the process of electrochemical performance measurements,Mn2O3/TiO2,MnO@NC and MnTiO3/TiO2/C composite can deliver a specific capacity of 452,786 and 418 mAh g-1 at the current density of 500 mA g-1 after 200 cycles,respectively.Even at a current density of 4 A g-1,the specific capacity of aforementioned samples can stabilize at 170,206 and 270 mAh g-1,confirming the superior rate performance.All of the texts data are higher than that of pristine Mn2O3 anode materials.In summary,the unique structure design and the synergistic of various components endow the above-mentioned composite with enhanced electrochemical performance. |
