Facile Preparation of NiO@graphene Nanocomposite with Superior Performances as Anode for Li-ion Batteries

Abstract

Transition metal oxides gain considerable research attentions as potential anode materials for lithium ion batteries, but their applications are hindered due to their poor electronic conductivity, weak cycle stability and drastic volume change. Here, a NiO@graphene composite with a unique 3D conductive network structure is prepared through a simple strategy. When applied as anode material for Li-ion batteries, at 50 mA g −1 , the NiO@graphene displays a high reversible capacity of 1366 mAh g −1 and a stable cyclability of 205 mAh g −1 after 500 cycles. Even at a high rate of 10 A g −1 , it displays a favorable reversible capacity of 711 mAh g −1 . Remarkably, when it recovers back to 0.05 A g −1 , a reversible capacity of 1741 mAh g −1 is achieved. Thus, the NiO@graphene composite with 3D structure shows good application prospects as an alternative anode for advanced lithium ion batteries.

Operando Color-Coding of Reversible Lithiation and Cycle Life in Batteries Using Photonic Crystal Materials

“…78 However, there is a large peak at ∼2.20 V in the cathodic sweep of the first CV cycle which is not present in the second cycle, or any subsequent cycles for that matter. The peak voltage for this reaction coincides with the reported reaction potential for the conversion of Ni metal to NiO; 79 the reverse reaction (NiO conversion to Ni metal) is not present in this potential window (1.0-3.0 V) as this reaction is reported to happen below 1.0 V 79 and so the modification of the Ni current collecting layer would appear to remain unique to the very first cycle.…”

A comprehensive review of various carbonaceous materials for anodes in lithium-ion batteries

“…The initial specific capacity is up to 652.8 mA h g −1 at 0.1 A g −1 , and reaches 198 mA h g −1 at 1 A g −1 after 300 cycles. Ou et al 141 prepared NiO@graphene composites with unique conductive network structures by a simple hydrothermal reaction method. The synergistic combination of graphene with high conductivity and NiO net structure benefits the excellent electrochemical performance of NiO@graphene composites.…”

Preparation of yolk–shell urchin-like porous Co3O4/NiO@C microspheres with excellent lithium storage performance

“…The disordered D-band peak at 1330 cm −1 implies that the carbon atoms feature crystal defects, which are conductive to accelerating the diffusion of lithium ions, promoting the transfer of electrons, and improving the lithium storage capacity. [29][30][31][32] The thermogravimetry curve of the YSUCNO@C microspheres was measured to determine the coated carbon content (Fig. S5 †), with the two weight losses corresponding to adsorbed water and coated carbon layers, and a coated carbon content of 6.06% was determined.…”