Superfine SnO₂ Uniformly Anchored on Reduced Graphene Oxide Sheets by a One‐Step Solvothermal Method for High‐Performance Lithium‐Ion Batteries

Abstract

In this work, the tin dioxide/reduced graphene oxide (SnO2/rGO) hybrid with 3D porous architecture has been prepared by a straightforward and environmentally friendly one‐step solvothermal method, in which superfine SnO2 nanoparticles are well‐proportioned immobilized on rGO. When applied as anode material for lithium‐ion batteries (LIBS), the prepared SnO2/rGO hybrid demonstrates superior electrochemical properties. It can be achieved high initial cycle reversible capacity of 1058 mA h g−1 and retained a stable discharge capacity of 1104 mA h g−1 after 200 cycles at 0.1 A g−1. Remarkably, a high capacity of 750 mA h g−1 can be kept after 500 cycles at 0.5 A g−1. These consequences manifest that the obtained SnO2/rGO hybrid is a promising anode material for LIBS.

Synthesis of Metal Oxide/Carbon Nanofibers via Biostructure Confinement as High-Capacity Anode Materials

“…The activation process of the electrode materials facilitates penetration of the electrolyte into N-CF and supplies additional interfacial charge storage between SnO x and carbon. Additionally, SnO x serves as an electrocatalyst which promotes the decomposition of the electrolyte and the reversible reaction, offering additional capacity during charge/discharge cycling. − Figure S10 shows a TEM image of the morphologies of the electrodes after cycling. The particles in the electrode become small and more amorphous because of the conversion reaction and alloying/dealloying.…”

Mass ratio-dependently tunable enhancement of the optical nonlinearities of SnO2/RGO composites

“…Figure 5 depicts the composition and valence information of elements of SnO 2 /RGO composite (ex.S2). [41,42]. The existence of Sn-O-C bonds indicates that SnO 2 and RGO were connected in the form of chemical bond, which not only enhanced the interaction between them, but also may affect the NLO properties of the composite.…”