Rodlike FeS/SnS@N-C Core–Shell Microparticles for Lithium-Ion Batteries

Abstract

FeS/SnS@N-C composites were successfully synthesized through the combination of nucleation self-assembly, N-doped carbon coating, and in situ vulcanization. The experimental results show that the discharge capacitance of FeS/SnS@N-C in the lithium storage process is 796.90 mAh g–1 at 0.5 A g–1 after 200 cycles, and more importantly, the discharge capacitance can maintain 278.84 mAh g–1 at 5 A g–1 after 2000 cycles. FeS in FeS/SnS@N-C plays a key role in the electrochemical performance, which is due to the certain electronic density of states (DOS) near the Fermi level. In short, our research expands the application of transition metal sulfide composites in lithium-ion batteries.

All-organic PVDF-based composite films with high energy density and efficiency synergistically tailored by MMA-co-GMA copolymer and cyanoethylated cellulose

“…26 Compared with PMMA, the MMA-co-GMA (MG) copolymer has a higher dielectric constant and stronger electric breakdown strength, and is miscible with PVDF, resulting in a greater improvement of crystal morphology and U e of PVDF. 27,28 As a result of our previously published research, the introduction of MG into PVDF promoted the formation of hydrogen bonds, which was useful for enhancing the trap energy level due to the epoxy groups of GMA on the MG macromolecular chains, thus inhibiting the carrier's transportation and delivery. 27 Therefore, the E b and U e of the composites reached the maximum when PVDF was blended with MG at 40% content.…”

“…27,28 As a result of our previously published research, the introduction of MG into PVDF promoted the formation of hydrogen bonds, which was useful for enhancing the trap energy level due to the epoxy groups of GMA on the MG macromolecular chains, thus inhibiting the carrier's transportation and delivery. 27 Therefore, the E b and U e of the composites reached the maximum when PVDF was blended with MG at 40% content. 28 In recent years, most researchers would like to utilize biorenewable polymers to replace traditional chemical raw materials for the preparation of dielectric films.…”

A covalent organic framework based on multi-carbonyl as anode material for lithium-organic batteries

“…1,3,5triformylchlorobutanediol, as a building unit, is widely used as a collective unit center for constructing a series of TFP-COFs. Of these, TFP-PaSO3H is the structure of 1.3.5-tri aldehyde-based phloroglucinol (TFP) and 2,5-diaminobenzene sulfonic acid (PaSO3H), which has been widely used in material technology [6] , Membrane process [7] and analytical chemistry [8] . Therefore, TFP-PaSO3H may become a good performance anode material for LIBs.…”