Superior cycle performance and high reversible capacity of SnO2/graphene composite as an anode material for lithium-ion batteries

Abstract

SnO2/graphene composite with superior cycle performance and high reversible capacity was prepared by a one-step microwave-hydrothermal method using a microwave reaction system. The SnO2/graphene composite was characterized by X-ray diffraction, thermogravimetric analysis, Fourier-transform infrared spectroscopy, Raman spectroscopy, scanning electron microscope, X-ray photoelectron spectroscopy, transmission electron microscopy and high resolution transmission electron microscopy. The size of SnO2 grains deposited on graphene sheets is less than 3.5 nm. The SnO2/graphene composite exhibits high capacity and excellent electrochemical performance in lithium-ion batteries. The first discharge and charge capacities at a current density of 100 mA g−1 are 2213 and 1402 mA h g−1 with coulomb efficiencies of 63.35%. The discharge specific capacities remains 1359, 1228, 1090 and 1005 mA h g−1 after 100 cycles at current densities of 100, 300, 500 and 700 mA g−1, respectively. Even at a high current density of 1000 mA g−1, the first discharge and charge capacities are 1502 and 876 mA h g−1, and the discharge specific capacities remains 1057 and 677 mA h g−1 after 420 and 1000 cycles, respectively. The SnO2/graphene composite demonstrates a stable cycle performance and high reversible capacity for lithium storage.

Three dimensional Graphene aerogels as binder-less, freestanding, elastic and high-performance electrodes for lithium-ion batteries

“…With the development of new electrode materials and technology innovations, LIBs which have high charge-discharge rate and specific capacity, have shown great advantages in the electronic field1234. It has been reported that several kinds of nanostructured, transition-metal oxides5 such as SnO 2 nano-particles can improve the performance of rechargeable LIBs6.…”

An elastic carbon layer on echeveria-inspired SnO2 anode for long-cycle and high-rate lithium ion batteries

“…Both electrodes show the distinct plateaus at around 1 V and 0.6 V vs. Li/Li + in the discharge procedure, ascribing to the electrolyte decomposition and the combination of SnO 2 reduction to Sn metal and the formation of the SEI film [3]. For charge step, we found the plateaus at 0.6 V and 1.3 V vs. Li/Li + for both electrodes, corresponding to the de-alloying reaction from Li x Sn and partially reversible reaction from Sn to SnO 2 [31].…”

Investigation of carbon phase evolutions in titanium nitride-carbon nanocomposites prepared in supercritical benzene with respect to their lithium storage capacity

“…The presence of G peak demonstrates E 2g mode of graphite, which is related to the vibration of sp 2 bonded carbon atoms in a 2-dimensional hexagonal lattice. Meanwhile, the presence of D peak is an indication of defects associated with vacancies, grain boundaries, and amorphous carbon species [18]. Moreover, the presence of 2D peak is the evidence of bi-layer graphene structure and good indication of c axis ordering.…”

“…At rst, speci c capacity initially increases up to 1.1 times during the rst three cycles that can be attributed to the boosting of its porous network structure. During Li insertion and extraction process, in the initial cycles, the TiN clusters pulverize into small particles due to electrochemical milling e ects that lead to more porous nanostructures with more edges, which are able to provide more activated sites for Li storage and also facilitate the penetration of the electrolytes [18,36]. Establishing di usive condition because of SEI formation leads to a capacity retention (C15/C3) of 95%.…”