Preparation of re-constructed carbon nanosheet powders and their efficient lithium-ion storage mechanism

Self-assembly flower-like porous carbon nanosheet powders for higher lithium-ion storage capacity

“…According to the nitrogen adsorption-desorption isotherms of CNPs shown in Fig. 4c, the total specific surface area of the CNPs was determined to be 113.1 m 2 g -1 , which is far higher than that of graphite powders (1.7-6.0 m 2 g -1 ) and re-CNSs (18.3 m 2 g -1 ) [7,24]. The adsorption and desorption isotherms of CNPs display hysteresis, which is indicative of a mesoporous structure.…”

“…The oxidized samples were then calcined at 500°C for 2 h under N2 to obtain the reduced CNPs. 7 The morphologies of the CNPs were characterized using scanning electron microscopy (SEM, ZEISS Ultra 55) and transmission electron microscopy (TEM, JEM-2100, Japan). The EDX spectra (ZEISS Ultra 55) were obtained to analyze the elemental composition.…”

“…To date, several kinds of carbon nanomaterials, including flower-like nanosheets, hierarchical porous nanosheets, and hollow microspheres, have been reported to have higher capacities than the theoretical capacity of graphitic carbon [3][4][5]. Recently, we also prepared a carbon nanomaterial by using graphene-like carbon nano-fragments (CNFs) as a carbon building block for the anode of LIBs that can store a higher capacity than natural graphite [6,7]. Based on its appearance, this carbon nanomaterial was named "re-constructed carbon nanosheets (re-CNSs)" [7].…”

“…Recently, we also prepared a carbon nanomaterial by using graphene-like carbon nano-fragments (CNFs) as a carbon building block for the anode of LIBs that can store a higher capacity than natural graphite [6,7]. Based on its appearance, this carbon nanomaterial was named "re-constructed carbon nanosheets (re-CNSs)" [7]. The spectroscopic and charge-discharge results demonstrated that the existence of wrinkles on re-CNSs can improve the initial specific capacity to 903 mAh g -1 .…”

Binder-free combination of large area reduced graphene oxide nanosheets with Cu foil for lithium ion battery anode

“…During the negatively scanning, 2 reduction peaks were detected at about 0.6 V and 0 V, corresponding to the formation of SEI film [28][29], and the intercalation of Li + within the inter layers and the defects of RGO nanosheets (such as pores, vacancies and edges), respectively [30][31]. Meanwhile, during the positively scanning, 2 oxidation peaks at about 0.3 V and 1.5 V were also observed, which can be ascribed to the extraction of Li + from RGO nanosheets and the defects (such as pores, vacancies and edges), respectively [31][32][33]. Fig.…”