Synthesis of biphenyl-linked covalent triazine frameworks with excellent lithium storage performance as anode in lithium ion battery

Fabrication of porous imidazole polymerized ionic liquids with fast ion diffusing kinetics for super lithiation anode materials in lithium-ion batteries

“…The low coulombic efficiency is mainly caused by the irreversible electrochemical reaction for the formation of the SEI film on the surface of the PILs-Im anode. 4 As the cycling continues, the charge capacity increases with the values of 748.9 (the 10 th cycle), 780.8 (the 30 th cycle), 795.8 (the 60 th cycle) and 846.6 (the 100 th cycle) mA h g −1 , implying that the PILs-Im anode undergoes an activation process, which is similar to the reported phenomenon in microporous polymer electrode materials. 45–48 The subsequent charge/discharge cycles exhibit a coulombic efficiency higher than 99%, which indicates that the PILs-Im anode possesses a high reversibility of the insertion/release of Li + in the structure after the formation of the SEI film.…”

“…2,3 Possessing the advantageous properties of polymers, PIL materials achieve stable electron transport and designed morphologies, such as tunable channels, and adjustable porous and two-dimensional layered structures. 4,5 Based on this, the ion interface on the skeleton of PILs changes the interaction between the polymer and ions, and counterions (such as Li + /Na + /Mg 2+ ) can be anchored in the polymeric backbone, providing PILs with new functional properties, including fast ion diffusion kinetics, excellent electrical conductivity (up to 10 À3 S cm À1 at 90 C) and wide electronic window (approximately to 5 V, compared to Li/Li + ), which consequently expand the scope of polymers. [6][7][8] Since the pioneering work of Ohno and coworkers in 1990, a series of exciting advances have been made for PILs for application in the eld of lithium-ion batteries (LIBs), including as binders, separators and electrolytes, which benet from the high ionic conductivity of PILs.…”

Molecular structure-controlled synthesis of sulfur-containing polymers for rechargeable Li–S batteries

“…These unique characteristics give POPs an advantage in inhibiting the shuttle effect of polysuldes and improving the utilization of active substances. The types of POPs mainly include covalent organic frameworks (COFs), [115][116][117] covalent triazine organic frameworks (CTFs) [118][119][120] and porous organic frameworks (POFs). [121][122][123] In this part, we summarize the recent applications and research progress of sulfur-containing polymers based on POP materials in Li-S batteries.…”

Construction of Fluorine‐ and Piperazine‐Engineered Covalent Triazine Frameworks Towards Enhanced Dual‐Ion Positive Electrode Performance

“…In addition to the triazine and benzene rings in CTFs, other N species, such as secondary and tertiary amines, should provide extra electron redox sites for a higher energy density [28] . In previous works, CTFs mainly served as organic anode materials in batteries [35–39] . However, the existence of both p‐ and n‐dopable regions in CTF frameworks allows for the intercalation of cations and anions, which provide both a high working voltage and energy density in dual‐ion batteries (DIBs) [24,40,41] .…”

“…[28] In previous works, CTFs mainly served as organic anode materials in batteries. [35][36][37][38][39] However, the existence of both p-and n-dopable regions in CTF frameworks allows for the intercalation of cations and anions, which provide both a high working voltage and energy density in dual-ion batteries (DIBs). [24,40,41] Since anions such as PF 6…”