Vertically aligned α-MnO 2 nanosheets on carbon nanotubes as cathodic materials for aqueous rechargeable magnesium ion battery

摘要: In this work, vertically aligned α-MnO2 nanosheets on carbon nanotubes are synthesized simply by a solution process and the electrochemical performance as host materials of magnesium ion is tested in aqueous solution. Cyclic voltammetry analysis confirms enhanced activity nanotube-supported samples. Moreover, skeleton could reduce charge transfer resistant cathode materials, which confirmed impedance spectroscopy. Furthermore, when batteries cathodic electrode, α-MnO2/carbon nanotube sample registers prominent discharge capacity 144.6 mAh g−1 at current density 0.5 A g−1, higher than (87.5 mAh g−1) due to synergistic effect insertion/deinsertion reaction physical adsorption/desorption process. After 1000th cycle, remarkable 48.3 mAh collected for 10 A 85% original. It found that not only improved but also cycling electrode significantly. Therefore, very promising candidate further application environmentally benign batteries.