N, S Co‐Doped Porous Carbon from Antibiotic Bacteria Residues Enables a High‐Performance FeF₃ ⋅ 0.33H₂O Cathode for Li‐Ion Batteries

Abstract

FeF3 ⋅ 0.33H2O is considered as a potential candidate cathode material owing to the special structure with one‐dimension (1D) tunnel. However, its practical application is hindered by the poor electric conductivity. In this work, FeF3 ⋅ 0.33H2O embedded into N, S co‐doped porous carbon (NSPC) derived from antibiotic bacterial residues was synthesized by a facile wet‐impregnation method. Close contact of FeF3 ⋅ 0.33H2O nanoparticles with NSPC can provide the rapid electron conduction channel and keep the structural stability, which endows that FeF3 ⋅ 0.33H2O@NSPC electrode achieves excellent cycling performance with a reversible capacity of 164.5 mAh g−1 at 40 mA g−1 after 100 cycles between 2.0 and 4.5 V and good rate performance. This study offers a new method for high‐value utilization of antibiotic bacteria residues (ABRs) for application in energy storage.

Rational Construction of Fluffy CNT on Binary FeCo‐NC as High‐Efficiency S Host for Li−S Battery

“…The fine scan spectra of the major elements of C, N, Fe, and Co were further deconvoluted for a detailed comparison of elemental configurations and chemical states. Figure S5A shows the C1s spectra and deconvolution curves of both samples, where the C−N species show the largest contribution of heteroatom‐containing functional groups, which agrees with their large N contents obtained by XPS element analysis [20] . As indicated by the deconvolutions of XPS N1s spectra, the N species in both samples consist mainly of pyridinic N (Figure S5B), which is correlated with the necessity for the coordination of Fe and Co species.…”

Recent advances of metal fluoride compounds cathode materials for lithium ion batteries: a review

“…In addition to metal cations, elemental doping of fluoride materials with anions has been studied. Some nonmetallic elements and functional groups have been introduced to fluoride materials to tailor the ionic interactions between Fe-F [170][171][172][173]. Lee and Kang [172] have prepared nitrogen-doped FeF 3 /C nanocrystals using melamine as the nitrogen source.…”

Toward High Energy Density FeFx (x=2 and 3) Cathodes for Lithium‐Ion Batteries

“…Considering the previous efforts to doping anions or cations in FeF x cathodes, the co‐doping strategy could be implemented by combining different heteroatoms [105,106] . For example, Fan et al [107] .…”

“…Considering the previous efforts to doping anions or cations in FeF x cathodes, the co-doping strategy could be implemented by combining different heteroatoms. [105,106] For example, Fan et al [107] developed the Fe 0.9 Co 0.1 OF cathode by Co and O co-substitution strategy, which achieved a rate capability of 340 mAh g À 1 at 0.64 A g À 1 by suppressed lessreversible conversion reaction and reducing the voltage hysteresis (Figure 6c and d). Further analysis of the structure evolution by In-situ synchronous X-ray technology and in-situ transmission electron microscopy showed that the diffusion channel of Li + was changed from 3D to 2D and the local structure-oriented rearrangement from corner-sharing octahedra to edge-sharing octahedrons (Figure 6e).…”