SnO2 nano-spheres/graphene hybrid for high-performance lithium ion battery anodes

The origin of anomalous large reversible capacity for SnO2 conversion reaction

“…In the case of 75 wt%-dosage (A), a capacity of 300 mA h g À1 was obtained at the 100th cycle, and the sample fully degraded aer 170 cycles. This value is more or less consistent with the data presented in other representative recent papers (X. Li et al, 53 H. Song et al, 54 M. Alaf et al, 55 J. Huang et al, 56 and X. Fan et al 36 ).…”

“…Such high performance has never been attained to date, according to previous reports. 36,[52][53][54][55][56] The reversible capacity of 837 mA h g À1 (at >1200 cycles) is equivalent to 1444 mA h g À1 relative to the mass of the SnO 2 active material, suggesting that the conversion reaction itself became reversible. This 1444 mA h g À1 capacity is purely ascribable to the capacity of SnO 2 in the 45 wt% dosage sample, since the capacity ascribed to the pure KB, 340 mA h g À1 , has already been subtracted.…”

Fabrication of novel rugby-like ZnSnO3/reduced graphene oxide composites as a high-performance anode material for lithium-ion batteries

“…3a shows the CV curves of ZSGNC electrode for the first three cycles at a scan rate of 0.1mV s -1 . A weak peak (~1.52 V) along with a strong peak (~0.91 V) can be observed for the first cathode scan, which correspond to the negligible amount of Li + inserted into the crystal structure [11], the reduction of ZnSnO 3 to Zn and Sn as well as the generation of the solid electrolyte interphase (SEI) layer, respectively [2,12], these two peaks disappear in the subsequent cycles. The redox couples indexed to 0.12/0.1V, 0.56/0.44V and 1.27/1.22V are relative to the intercalating/extracting process of Li + , alloying/dealloying processes of Li x Sn and Li y Zn, respectively, matching well with the first three GCD curves (Fig.…”

The preparation and characterization of SnO2/rGO nanocomposites electrode materials for supercapacitor

“…5 For many of these composites materials, many studies show that graphene is an effective conductive substrate for further construction of the high-quality SnO 2 nanomaterials. 1,[6][7][8][9][10][11][12] The preparation of SnO 2 /graphene composites can not only effectively prevent the reunion of SnO 2 nanostructures and stack of graphene resulting the larger electrical activity surface area but also improve the electrical conductivity and mechanical stability of composite material, which is good for the transport of ionic and the improve of electrochemical performance.…”