Flexible Free-Standing Graphene/SnO₂ Nanocomposites Paper for Li-Ion Battery

Abstract

A flexible free-standing graphene/SnO₂ nanocomposites paper (GSP) was prepared by coupling a simple filtration method and a thermal reduction together for the first time. Compared with the pure SnO₂ nanoparticles, the GSP exhibited a better cycling stability, because the graphene with high mechanical strength and elasticity can work as a buffer to prevent the volume expansion and contraction of SnO₂ nanoparticles during the Li⁺ insertion/extraction process. Meanwhile, compared with single graphene paper, the GSP showed a higher capacity because of the hybridizing with higher capacity SnO₂ nanoparticles. The excellent electrochemical performance of the GSP as an anode material in Li-ion battery was obtained. The as-prepared GSP shows a great potential for flexible Li-ion batteries.

Enhanced electrochemical performance of CoMoO4 nanorods/reduced graphene oxide as anode material for lithium-ion batteries

“…An extensively used approach to conquer these issues is to design and optimize nanocomposites for homogeneous dispersion and high electrical conductivity [21][22][23][24][25][26]. Liang [27] showed that rGO in the rGO/SnO 2 composite not only improved the conductivity of the overall electrode but also largely enhanced the electrochemical activity of SnO 2 nanoparticles during the cycle processes. Reddy [28] reported that the excellent cyclic stability and capacity of MnO 2 /CNT coaxial nanotube electrodes resulted from the hybrid nature of the electrodes with improved electronic conductivity and dual mechanism of lithium storage.…”

Current Collectors for Flexible Lithium Ion Batteries: A Review of Materials

“…These nanocomposite films showed a discharge capacity of 708 mAh/g after 100 cycles in the form of a half-cell [22]. Similarly, free-standing graphene/ SnO 2 nanocomposite paper was also investigated as an alternative flexible anode [23]. As compared with CNTs, graphene-sulfur paper was investigated as a cathode for flexible LIBs by using an in situ redox reaction followed by vacuum filtration.…”

Graphene‐Based Electrodes for Lithium Ion Batteries

“…Such approaches usually produce low loading and aggregation of metal oxides; thus the improvement on the overall hybrid electrode performance was limited. Another way was based on vacuum filtration, by which various active materials (such as Fe 3 O 4 [81], Co 3 O 4 [82], SnO 2 [34,83], TiO 2 [84,85], MnO 2 [68,86], V 2 O 5 [14], and silicon [87][88][89]) were incorporated into the graphene scaffold [68]. Specifically, both components were homogeneously mixed and filtered to produce paper-like electrodes, in which graphene formed a 3D conductive network to behave as a mechanical support and embedded-in current collector.…”

“…Guo et al [83] first prepared a flexible, free-standing SnO 2 nanoparticle/GS paper by vacuum filtration of GO and SnO 2 nanoparticles, followed by a thermal reduction (Figure 2.15a). Compared with single graphene paper, the hybrid paper showed a higher capacity because of the hybridization with high-capacity SnO 2 nanoparticles.…”