4 research outputs found
Lowātemperature selective catalytic reduction of NO over carbon nanotubes supported MnO 2
Synergistic Effect of ZnāCo Bimetallic Selenide Composites for LithiumāSulfur Battery
Compared with monometallic selenides, heterogeneous bimetallic selenides have rich phase boundaries and superior electrical conductivity. ZnSe/CoSe2 composites were prepared by introducing Zn metal and using ZIF-8/67 as the precursor through the synergistic effect between Zn and Co after selenification. The electrocatalytic conversion of polysulfide is accelerated by ZnSe through chemical adsorption and the catalytic effect. The conductive CoSe2 surface provides a rapid diffusion path for lithium ions, accelerating the conversion of the polysulfide. On the basis of their individual strengths, ZnSe and CoSe2 can jointly promote the smooth adsorptiveādiffuseācatalytic conversion process of polysulfide and induce the growth of lithium sulfide around its heterogeneous interface, thus enhancing the electrochemical performance of the lithiumāsulfur battery cathode materials. The ZnSe/CoSe2āS electrode, at the optimal Zn-to-Co ratio of 1:1, has a 790.06 mAh gā1 initial specific capacity at 0.2 C and excellent cycling stability at 1 C. After 300 cycles, the final capacity is 300.85 mAh gā1, and the capacity retention rate reaches 82.71%