Graphene oxide wrapped porous NiO/CNT microspheres with excellent lithium storage performance

Abstract

Three-dimensional porous NiO/CNT microspheres are constructed by the facile spray-drying method and subsequent annealing treatment under N2 atmosphere, which are subsequently wrapped by graphene oxide (GO) to form the porous NiO/CNT/GO microspheres. Benefiting from abundant pores distributed between NiO nanoparticles and CNT, porous NiO/CNT/GO microspheres exhibit a good cycling stability (333.6 mA h g−1 after 1000 cycles at 2000 mA g−1). Thanks to CNTs distributed inside the microspheres and GO that provides support for microspheres, porous NiO/CNT/GO microspheres show a high rate performance (445.1 mA h g−1 at 5000 mA g−1). This work provides an approach for the synthesis of high-performance lithium-ion battery anode materials, and the synthesis of porous NiO/CNT/GO microspheres plays a very important role in promoting applied physics, which has brought vitality to physics.