Spherical-graphite/nano-Mn2O3 composites as advanced anode materials for lithium half/full batteries

The spherical-graphite/Mn2O3 composites (SG/Mn2O3) with a core-shell structure have been facilely synthesized by the initial coprecipitation method and subsequent calcination treatment. As-synthesized composites as anode materials demonstrate remarkable lithium storage performances. The optimal SG/Mn2O3 with 17.6 wt% of Mn2O3 nanoparticles manifests the charge capacity of 499 mA h g(-1) over 100 cycles at 0.5 A g(-1), and presents the reversible capacity of 383 mA h g(-1) under 2 A g(-1) after 1000 long cycles for lithium-ion half batteries. When the optimal SG/Mn2O3 electrode is assembled to full-cell using LiFePO4 as the cathode, the full-cell affords the discharge capacity of 318 mA h g(-1) with capacity retention of 97.2% at 0.1 A g(-1) over 30 cycles. The high capacity of Mn2O3 nanoparticles coating on the surface/interface of SG enhances the long-periodic cycling properties and rate performance of overall electrode. The superior lithium storage performance demonstrates that the SG/Mn2O3 has great potential in the new-generation energy storage devices. (c) 2020 Elsevier B.V. All rights reserved.

Automated summary

The spherical-graphite/Mn2O3 composites with a core-shell structure are facilely synthesized and demonstrate remarkable lithium storage performances as anode materials for lithium-ion batteries. The high capacity of Mn2O3 nanoparticles coating enhances the cycling properties and rate performance of the overall electrode, showing great potential in new-generation energy storage devices.