Newly developed cost-effective manganese anode -Lithium - Ion Battery Equipment

Newly developed cost-effective manganese anode material -Lithium - Ion Battery Equipment

Researchers at the University of Akron have developed Mn3O4/C hierarchical porous nanospheres and used them as anode materials for lithium-ion batteries. These nanospheres have high reversible specific capacity (1237mAh/g when the current is 200?mA/g), excellent stability (425mAh/g when the current is 4A/g) and extremely Long cycle life (current is 4A/g, no obvious capacity decay after 3000 cycles of use).

In theory, transition metal oxides are promising anode candidates due to their high capacity and low cost. Among such materials, Mn3O4 has abundant reserves, is not easily oxidized, and is electrochemically competitive. As a battery anode material, it has a good prospect and is also widely used in the research of various battery materials.

However, transition metal oxides can become anode materials for lithium-ion batteries (LIBs), but they encounter several problems: First, the inherent poor conductivity of metal oxides limits the electron transport across the electrode, resulting in low utilization of active materials, Valuation is low. Second, the large volume expansion of metal oxides during lithiation and delithiation can lead to electrode pulverization, which accelerates the capacity fading during cycling. It is well known that nanoengineering and carbon hybridization are effective methods to overcome and limit such problems.(Lithium - Ion Battery Equipment)

The research team utilized a solvothermal reaction to synthesize self-assembled manganese-based metal complexes (Mn-MOCs) with spherical structures. The researchers then transformed the Mn-MOC precursor material into hierarchically porous Mn3O4/C nanospheres by thermal annealing.

The researchers attribute the lithium storage ability to the unique porous hierarchical structure of the nanospheres. The nanospheres consist of Mn3O4 nanocrystals, which are covered with a thin, uniformly distributed carbon shell. The nanostructure has a large reaction area, enhanced electrical conductivity, and is easy to form a stable solid electrolyte interface (SEI) and can adapt to the volume change of conversion reaction-type electrodes.



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