NiO nanosheets grown on graphene nanosheets as superior anode materials for Li-ion batteries

Abstract

This paper reports a hydrothermal preparation of NiO-graphene sheet-on-sheet and nanoparticle-on-sheet nanostructures. The sheet-on-sheet nanocomposite showed highly reversible large capacities at a common current of 0.1 C and good rate capabilities. A large initial charge capacity of 1056 mAh/g was observed for the sheet-on-sheet composite at 0.1 C, which decreased by only 2.4% to 1031 mAh/g after 40 cycles of discharge and charge. This cycling performance is better than that of NiO nanosheets, graphene nanosheets, NiO-graphene nanoparticle-on-sheet, and previous carbon/carbon nanotube supported NiO composites. It is believed that the mechanical stability and electrical conductivity of NiO nanosheets are increased by graphene nanosheets (GNS), the aggregation or restacking of which to graphite platelets are, on the other hand, effectively prevented by NiO nanosheets.

Fabrication of Ce-doped MnO2decorated graphene sheets for fire safety applications of epoxy composites: flame retardancy, smoke suppression and mechanism

“…41 In contrast, the resulting Ce-MnO2-GNS hybrid exhibits remarkably different thermogravimetric behavior with about 52 wt% of residue at 800 o C. These results demonstrate that the combination of Ce-MnO2 with GNS significantly improves the residue yield of GNS.…”

Critical Insight into the Relentless Progression Toward Graphene and Graphene‐Containing Materials for Lithium‐Ion Battery Anodes

“…Another MoS 2 -graphene hybrid was also reported by J. P. Lemmon et al [ 132 ] In their work, RGO (2 wt%) was incorporated into a MoS 2 /polyethylene oxide (PEO) composite but, even if properly engineered, no real progresses in terms of cycling stability or gravimetric capacity were achieved with respect to the previous MoS 2 research efforts (see Table 2 ). A further graphene/metal sulfi de hybrid (i.e., RGO/CdS [ 133 ] ), alongside with several conversion-(i.e., RGO/ NiO, [ 134 ] RGO/MoO 2 , [ 135 ] RGO/Mn 2 Mo 3 O 8 , [ 136 ] RGO/MnO 2 , [ 137 ] polymer-functionalized RGO/MnO 2 , [ 138 ] solvothermally produced graphene/MnO 2 , [ 139 ] N-doped RGO/VN [ 140 ] and RGO/ CeO 2 [ 141 ] ), and alloying-(RGO/SnSe 2 , [ 142 ] RGO/NiSb [ 143 ] and RGO/FeSb 2 [ 143 ] ) based composites were also proposed for the fi rst time. Unfortunately, none of these enabled satisfactory long term stability (maximum 100 cycles), and most of them showed a high 1 st cycle irreversible capacity (see Table 2 ).…”

Reduced graphene oxide–titania based platform for label-free biosensor

“…[25][26][27][28] It has been reported that the use of MOsN and GO nanocomposites may result in improved biosensor efficacy compared to when a single component is used. [29][30][31][32][33] Recently, a GO and titanium oxide (TiO 2 ) nanocomposite has been explored for the development of lithium ion batteries, photocatalysts and dye sensitized solar cells. 34 However, the RGO and MOsN composite have not yet been used for the fabrication of an electrochemical immunosensor.…”