Synthesis of Co2SnO4 hollow cubes encapsulated in graphene as high capacity anode materials for lithium-ion batteries

Abstract

A Co 2 SnO 4 hollow cube/graphene composite (Co 2 SnO 4 HC@rGO) was synthesized by pyrolysis-induced transformation from the hydrothermally synthesized hollow cubic precursor and subsequent combination with graphene sheets via the analogous mechanism of electrostatic interactions. The Co 2 SnO 4 HCs with a size of 240 nm and the shell of 50-70 nm thickness were uniformly encapsulated in the graphene sheets. As an anode material for lithium-ion batteries, the Co 2 SnO 4 HC@rGO exhibited significantly enhanced cyclability and superior rate capability compared to the pure Co 2 SnO 4 counterpart. Even after 100 cycles, it still delivered a capacity over 1000 mA h g À1 at 100 mA g À1 .

Significant impact of 2D graphene nanosheets on large volume change tin-based anodes in lithium-ion batteries: A review

“…[226]. interaction technique discussed above [226]. Both types of Zn 2 SnO 4 /graphene composites show similar morphologies, which can been observed in the TEM images of Fig.…”

“…The Co 2 SnO 4 with GNSs coating exhibits stable cyclability (1016.2 mAh g À1 at 100 mA g À1 up to 100 cycles) and superior high-rate capability (775 mAh g À1 at 500 mA g À1 ). Obviously, the GNSs coating improves not only the structural stability but also the lithium storage kinetics and electronic transport of Co 2 SnO 4 [226].…”

“…[213]; and Co 2 SnO 4 HC@rGO (d); schematic illustration of the formation of Co 2 SnO 4 HC@rGO (e); Reproduced from Ref. [226]. interaction technique discussed above [226].…”

“…GNSs coatings have been employed to study stannate/graphene composites via an analogous mechanism of electrostatic interactions [226]. For example, Co 2 SnO 4 hollow cubes were first functionalized to give them a positively charged surface and then assembled with negatively-charged GO.…”

Graphene‐Containing Nanomaterials for Lithium‐Ion Batteries

“…ZnFe 2 O 4 nanocrystals/graphene hybrids synthesized by in situ hydrothermal route were also recently noted by Xie et al [ 355 ] An inverse spinel Co 2 SnO 4 hollow cube/graphene composite, delivering a capacity over 1000 mAh g −1 at 100 mA g −1 , was synthesized by a pyrolysis-induced transformation. [ 356 ] The reaction mechanism was expressed as follows: …”