Abstract
After self-assembly and thermal reduction at low temperature (350 °C), reduced graphite oxide membranes (RGOM) with few cracks are obtained. The structure leads to low specific capacities of RGOM electrodes in lithium ion battery (LIB) and sodium ion battery (SIB). Molecular dynamic (MD) simulations indicate that damage for intactness of RGOM has positive impact on ions' diffusion of RGOM in LIB and SIB electrolyte. The damage is completed by pressing RGOM on Cu foams in this paper. According to electrochemical tests, the charge storage mechanism of RGOM in LIB and SIB are both obviously affected by ions’ diffusion, and thus the modified RGOM electrodes assisted with Cu foams show more electrochemical active sites, higher initial coulombic efficiency (∼1.29 times improvement for LIB and ∼1.40 times improvement for SIB at a current density of 50 mA g−1) and specific capacities (∼5.3 times improvement for LIB and ∼10 times improvement for SIB at a current density of 1 A g−1), which is meaningful for application of RGOM in LIB and SIB on a large scale.
Published Version
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