RuO2 active particles supported on Ni12P5 as excellent electrocatalysts for LiO2 batteries

Ni 12 P 5 has excellent electrochemical properties due to the existence of a large number of Ni P bonds with abundant phosphorus vacancies. RuO 2 has good electrical conductivity and catalytic activity , and its OER activity is very significant. In this paper, RuO 2 nanoparticles were loaded onto the surfaces of Ni 12 P 5 particles, forming RuO 2 /Ni 12 P 5 /C composite electrode catalytic materials which were prepared and applied to Li O 2 cells. The electrochemical tests reveal that the specific capacity of the Li O 2 battery with a RuO 2 /Ni 12 P 5 /C electrode reaches 4296 mAh g −1 , the cycle life reaches 56 cycles, and the over-potential is effectively controlled at the current density of 200 mA g −1 . This improvement is attributable to the effective adsorption of phosphorus vacancies in Ni 12 P 5 and the excellent OER catalytic activity of RuO 2 . Therefore, this work significantly enhanced the electrochemical performance of the cell, thus laying the foundation for the development of Li O 2 batteries.