High performance Li–S battery based on amorphous NiS₂as the host material for the S cathode

Abstract

A Li–S battery based on amorphous NiS2showed fabulous stability and high S utilization.

Nickel sulfide thin films and nanocrystals synthesized from nickel xanthate precursors

“…Among these are solid-state reactions [24,25], physical vapor and atomic layer depositions [14,26], laserinduced reactions [27], electrochemical processes [8], solvo-and hydrothermal routes [2,4,[11][12][13], spray pyrolysis [16], solution-based processes at room temperature [6,22], or microwave-assisted syntheses [3,5].…”

“…Cubic pyrite NiS 2 (vaesite), suggested as a MottHubbard insulator, exhibits semiconductor behavior with interesting electrical, optical and magnetic properties [19] and is explored for applications in hydrogen production [5] and batteries [6]. Ni 3 S 2 (heazlewoodite) is a Pauli paramagnetic metal [20] with a stable rhombohedral crystal structure [21] and displays catalytic activity in water splitting reactions [7,8].…”

Co‐doping Nitrogen/Sulfur through a Solid‐State Reaction to Enhance the Electrochemical Performance of Anatase TiO2 Nanoparticles as a Sodium‐Ion Battery Anode

“…The peak in the N 1s spectra (Figure 5c) at 395.79 eV (peak I) is assigned to the substituted N species in the TiO 2 lattice (TiÀN), while the prominent peak II corresponds to the interstitial N and a trace of chemically adsorbed nitrogen. [10,26,40,41] Figure 5d shows the S 2p spectra of the N/S-TiO 2 . Due to the partial overlapping of S 2p 3/2 and S 2p 1/2 , XPS signals associated with the substituted sulfur (S sub ) should be found in the 159.8 eV-165.4 eV range (peak I).…”

“…[6][7][8][9] TiO 2 was also proposed as one of the promising anode materials for SIBs owing to its small volume change (less than 4 %) during Na + insertion and extraction. [10] However, the electronic conductivity and Na + diffusivity of TiO 2 are not very satisfied, which cause a low capacity during cycling process. [11] Improving Na + diffusion in TiO 2 could be achieved by nano-sized TiO 2 with different morphology, such as nanoparticles, [12] nanotubes, [13] or nanorods [14] .…”

Nitrogen‐Doped Graphdiyne as High‐capacity Electrode Materials for Both Lithium‐ion and Sodium‐ion Capacitors

“…[40][41][42][43] The defects generated by N-doping can also increase the conductivity and wettability of the materials. [38,[44][45][46][47] Based on the above, N-doped graphdiyne (N-GDY) is synthesized by pyrolysis of GDY under ammonia (NH 3 ). N-GDY possesses many excellent properties, such as three-dimensional porous channels, many active sites and defects induced by nitrogen doping, and better conductivity.…”