Ultrafine Co_1–xS Attached to Porous Interconnected Carbon Skeleton for Sodium-Ion Batteries

Abstract

Carbon-based materials are effective carriers of metal sulfides because of their good volume stability and chemical stability, which can reduce volume expansion of materials and can also inhibit the interfacial reaction. In this study, Co1–x S incorporated into three-dimensional porous biomass carbon skeleton were synthesized by a template method. The three-dimensional porous carbon with large surface area is favorable for the electrolyte infiltration. The uniform distribution of Co1–x S nanoparticles results in a high reversible electrochemical reaction. The well-designed Co1–x S/three-dimensional porous carbon structure exhibits outstanding performance when used as an anode for sodium-ion batteries (SIBs). The results show that the transition mental sulfide/three-dimensional porous carbon structure has broad application prospects in SIBs.

Bimetallic Co–W–S Chalcogenides Confined in N,S-Codoped Porous Carbon Matrix Derived from Metal–Organic Frameworks for Highly Stable Electrochemical Supercapacitors

“…Figure d demonstrates the XRD pattern of the binary sulfide composite, displaying diffraction peaks at 2θ = 14.28, 33.09, 39.45, 43.7, and 58.49°, which are related to the (002), (100), (103), (006), and (110) reflections of hexagonal WS 2 , respectively . Moreover, the diffraction peaks at 2θ = 20.08, 21.89, 30.52, 35.68, 46.8, and 54.82° are indexed to the (200), (211), (100), (101), (102), and (110) reflections of the hexagonal Co 1– x S phase, respectively . Besides, it is noticed that there is no apparent diffraction peak at 2θ ∼ 26°, which could be ascribed to the production of the amorphous carbon matrix or due to its lower relative diffraction intensity with respect to those of the metal sulfides …”

Progress and Prospects of Transition Metal Sulfides for Sodium Storage

“…The charge/discharge mechanism of Co 1−x S anode was investigated by Fang et al [88]. Figure 12e, f show the HRTEM images and the corresponding SAED patterns of the phase variation of the Co 1−x S during the first cycle.…”

“…d In-situ XRD patterns of the NiS x @C-600 anode under different conditions during the second electrochemical cycle [94]. Ex-situ HRTEM images and the corresponding SAED patterns of the Co 1-x S/C electrode at e sodiated and f desodiated states [88]. g Ex-situ XRD patterns of the (Co 9 S 8 QD@ HCP)@rGO anode under different voltage conditions and the corresponding charge/discharge curves during the first cycle.…”

Investigation of the Sn4+-distribution and photocatalytic performance of Sn4+/TiO2 hollow fiber nanomaterials

“…In addition, the quick recombination of photogenerated charges is also another limitation for achieving a high photocatalytic efficiency of TiO 2 . 8 Therefore, various modification methods, such as doping metal ions and nonmetal elements, [9][10][11][12][13] coupling narrow-band semiconductors, [14][15][16] and combining conjugated polymers, 17,18 have been developed and employed to broaden the light response range of TiO 2 and reduce the recombination of charge carriers.…”