E-mail: ypdu nankai. E-mail: zongyou. However, a facile and controllable synthesis of monodispersed CoF 2 and CoF 2 -based nano-heterostructures have been rarely reported. In this direction, an eco-friendly and precisely controlled colloidal synthesis strategy to grow uniformly sized CoF 2 nanorods and LiF-tipped CoF 2 -nanorod heterostructures based on a seeded-growth method is established. The unveiled selective growth of LiF nanoparticles onto the two end tips of the CoF 2 nanorods is associated with the higher energy of tips, which favors the nucleation of LiF nanocrystals.
Notably, it was found that LiF could protect CoF 2 from corrosion even after 9 months of aging. In addition, the as-obtained heterostructures were employed in supercapacitors and lithium sulfur batteries as cathode materials.
The heterostructures consistently exhibited higher specific capacities than the corresponding two single components in both types of energy storage devices, making it a potential electrode material for energy storage applications. It is known that the oxides, sulfides, and phosphides of cobalt have been widely used in energy storage devices and researchers have designed some efficient strategies for boosting their performance. In order to improve the performance of CoF 2 as an electrode material, some strategies have been reported.
Additionally, in these wet chemical synthesis methods, environmentally unfriendly HF and NH 4 F were always used as fluoride sources or TOPO trioctyl phosphorus oxide solvents. To sum up, a precise green synthesis of CoF 2 with functional nano-heterostructures has been rarely reported to date, which is probably associated with its strong ionic bonds, unconducive to the construction of heterostructures.
In this study, monodispersed CoF 2 nanorods were synthesized by developing a facile colloidal synthesis strategy using trifluoroacetates as precursors. Then, the CoF 2 nanorods were used as the template for constructing the CoF 2 βLiF rod-like heterostructure by injecting a lithium trifluoroacetate solution.
