Significant improvement in Mn₂O₃ transition metal oxide electrical conductivity via high pressure

Highly efficient energy storage is in high demand for next-generation clean energy applications. As a promising energy storage material, the application of Mn₂O₃ is limited due to its poor electrical conductivity. Here, high-pressure techniques enhanced the electrical conductivity of Mn₂O₃ significantly. In situ synchrotron micro X-Ray diffraction, Raman spectroscopy and resistivity measurement revealed that resistivity decreased with pressure and dramatically dropped near the phase transition. At the highest pressure, resistivity reduced by five orders of magnitude and the sample showed metal-like behavior. More importantly, resistivity remained much lower than its original value, even when the pressure was fully released. This work provides a new method to enhance the electronic properties of Mn₂O₃ using high-pressure treatment, benefiting its applications in energy-related fields.