Top-down strategy synthesis of fluorinated graphdiyne for lithium ion battery

Abstract

Fluorine doped graphdiyne was synthesized by exposure to XeF2 under mild temperature. Owing to the enhanced conductivity and enhanced mechanical properties, the electrochemical performances are significantly improved.

2D graphdiyne: an emerging carbon material

“…Heteroatom doping offers an efficient method for modulating the properties of carbon materials. GDY provides unique properties for heteroatom-doping, such as nitrogen-(N-GDY), 81,84,85 fluorine-(F-GDY), 82,86,87 chlorine-(Cl-GDY), 88,89 boron-GDYs (B-GDY), [90][91][92][93][94] phosphorus-GDYs (P-GDY), 95 hydrogen-(H-GDY), [96][97][98][99][100] and sulfur-(S-GDY) 101,102 doped GDYs. These heteroatom-doped GDY were either prepared via a top-down or a bottom-up approach.…”

Heteroatoms in graphdiyne for catalytic and energy-related applications

“…Similarly, in 2019, Kang et al prepared F-GDY by mixing and annealing XeF 2 with GDY. 122 Fluorine was doped in a benzene ring and acetylenic bond. In addition to introducing a more atomic defects and electrochemical active sites, the elastic modulus of F-GDY is doubled in contrast to the pristine GDY (7.92 for F-GDY, and 4.12 for GDY).…”

“…With F-DGY as the cathode material of lithium-ion battery, the capacity reaches about 1080 mA h g À1 at a current density of 500 mA g À1 aer 600 cycles. 122 The introduction of F into GDY helps to improve the electronic properties for applications in not only lithium-ion batteries but also potassium ion batteries. 123 Compared to Li ions, K ions have a larger ionic radius, and the stable storage and diffusion of K ions require the design of electrode materials with regular channels, convenient diffusion channels, a large volume of expansion space, and good interface compatibility.…”

Enhancing Lithium-Storage Performance via Graphdiyne/Graphene Interface by Self-Supporting Framework Synthesized

“…First, 20 mg of [(trimethylsilyl) ethynyl]­benzene and 2 mL of tetrabutylammonium fluoride solution were added into 30 mL of the tetrahydrofuran solution passed through an ice bath until the solution changed color to purple. After that, the solution was washed with saturated NaCl solution and dried with anhydrous Na 2 SO 4 , and the hexaethynylbenzene monomer was obtained by evaporating the solution under a vacuum . Then, it was transferred to a three-necked flask containing 80 mL of pyridine solution.…”

“…After that, the solution was washed with saturated NaCl solution and dried with anhydrous Na 2 SO 4 , and the hexaethynylbenzene monomer was obtained by evaporating the solution under a vacuum. 17 Then, it was transferred to a three-necked flask containing 80 mL of pyridine solution. The reaction was continued for 48 h at 110 °C in a dark argon environment.…”