Researchers at the University of Akron in the United States developed Mn 3O4/C grades porous nanospheres and uses them as anode materials for lithium-ion batteries. These nanoballs have a higher reversible specific capacity (200 mA/g and a battery capacity of 1237 mAh/g), providing excellent stability. Sex (4A/g current, battery capacity 425mAh/g) and extremely long cycle life (current 4A/g, 3000 cycles without significant loss of capacity).
Theoretically, the transition metal oxide has high capacity and low cost, and is a promising anode candidate. In this type of material, Mn 3O4With abundant reserves, it is not easily oxidized, and it is electrochemically competitive. As a battery anode material, its prospect is good, and it is also widely used in the research of various types of battery materials.
However, transition metal oxides can become anode materials for lithium-ion battery (LIBs), and several problems have also been encountered: First, the inherent poor conductivity of metal oxides limits the electron transport throughout the electrode, resulting in low utilization of active materials. The low appraisal rate. Secondly, the large volume shrinkage of metal oxides during lithiation and delithiation can lead to electrode comminution, thereby accelerating capacity decay during recycling. It is well known that nanoengineering and carbon hybrids are overcome and An effective way to limit such issues.
The research team used a solvothermal reaction to synthesize a self-assembled manganese-based metal complex (Mn-MOC) that has a spherical structure. The researchers then converted the Mn-MOC precursor material into porous layers by thermal annealing. Mn 3O4/C nanospheres.
Researchers attribute the lithium storage capacity to the unique porous hierarchical structure of nanospheres. Nanospheres Mn 3O4Nanocrystalline composition, the crystal covers a uniform distribution of thin carbon shells. This nanostructure has a large reaction area, enhanced conductivity, and easy to generate a stable solid electrolyte interface (SEI) formation and can adapt to the volume of the conversion reaction type electrode Variety.
