Incorporation of heterostructured Sn/SnO nanoparticles in crumpled nitrogen-doped graphene nanosheets for application as anodes in lithium-ion batteries

Abstract

Sn/SnO nanoparticles are incorporated in crumpled nitrogen-doped graphene nanosheets by a simple melting diffusion method. The resulting composite exhibits large specific capacity, excellent cycling stability and high rate capability as an anode for lithium-ion batteries.

Three‐Dimensional Molybdenum Disulfide Nanoflowers Decorated on Graphene Nanosheets for High‐Performance Lithium‐Ion Batteries

“…The mass percentage of MoS 2 in the C‐FL‐MoS 2 /graphene and N‐FL‐MoS 2 /graphene composites was calculated to be around 68.17 and 71.74 wt %, respectively. The Raman spectra shown in Figure c show two distinct bands at shifts of about 1330 and 1580 cm −1 , and they are assigned to the D band and G band of graphene . Commonly, the relative intensity ratio of these bands ( I D / I G ) can serve as a convenient measurement of defects in carbon materials, and they were calculated to be 1.44 and 1.31 for C‐FL‐MoS 2 /graphene and N‐FL‐MoS 2 /graphene, respectively.…”

Ultrafine Sn Nanoparticles Anchored on Nitrogen‐ and Phosphorus‐Doped Hollow Carbon Frameworks for Lithium‐Ion Batteries

“…After 800 °C heat treatment, LFP was dissolved and washed away from the carbon framework by acid treatment to obtain G‐HCF. At 250 °C, molten Sn could be imbibed to the carbon structure due to the low melting point of Sn (231 °C) . The capillary force exerted by the carbon scaffold sandwiched with hollow porous carbon structures could help the molten Sn to get embedded into the carbon structure.…”

N-doped crumpled graphene: bottom-up synthesis and its superior oxygen reduction performance

“…3b) [56]. In low-frequency region, the CrG-900, with mutual supporting crumpled GO sheets, shows much bigger slope than Pt on particle-like carbon, indicating that smooth mass transportation occurs [9,21].…”

“…For instance, CrG induced by metal oxide template barely changed its capacitance as current density increasing from 0.5 to 100 A g −1 , because the crumpled form can efficiently provide plentiful, stable interfacial contacts and low-electrical-resistance pathways even under extremely high compressive strength [9,15,32,33]. Additionally, the large free volume enclosed by the crumpled thin layers can be utilized for loading active materials and these cargos can be well protected by the inert graphene sheet, which further extends the potential applications [18,21,27,28,34,35]. Currently, the potential-to-scale-up methods are usually based on top-down transforming the 2D graphene sheet into crumpled ball structure while bottom-up synthetic methods remain for exploration [9,33,36].…”

“…Thus the devices made by CrG are significantly less dependent on the electrode mass loading, showing high potential of crumpled form in preventing graphene restacking and maintaining high accessible surface area, which is especially appealing for real applications of energy conversion and storage [18][19][20][21][22][23][24][25][26][27][28][29][30][31]. For instance, CrG induced by metal oxide template barely changed its capacitance as current density increasing from 0.5 to 100 A g −1 , because the crumpled form can efficiently provide plentiful, stable interfacial contacts and low-electrical-resistance pathways even under extremely high compressive strength [9,15,32,33].…”