Facile synthesis of MnO2@C@Ni(OH)2 core–shell nanowires for high-performance supercapacitor.

One-dimensional MnO₂@C@Ni(OH)₂ core–shell nanowires were successfully synthesized by simple hydrothermal and chemical bath method. The MnO₂@C@Ni(OH)₂ core–shell nanowires showed a high capacitance of 1595.4 F g⁻¹ at 1 A g⁻¹ as supercapacitor electrode material. After 6000 cycles, the cyclic reservation rate was about 82.3%, informing the good cycling stability. The asymmetric supercapacitor composed of MnO₂@C@Ni(OH)₂ as positive electrode and activated carbon as negative electrode exhibited high energy density of 39.78 Wh kg⁻¹. This research provides that the fabricated MnO₂@C@Ni(OH)₂ core–shell nanowires will be the promising supercapacitors materials in the future. [ABSTRACT FROM AUTHOR]