Hierarchical Ni(OH)2–MnO2hollow spheres as an electrode material for high-performance supercapacitors

Hierarchical Ni(OH) 2 –MnO 2 hollow spheres are prepared via a simple self-templating route. The structural and compositional advantages of the Ni(OH) 2 –MnO 2 material endow it with remarkable performance as a supercapacitor.