Understanding the high capacity contributions of Cu3PS4 towards lithium storage

Copper Selenophosphate, Cu3PSe4, Nanoparticle Synthesis: Octadecane Is the Key to a Simplified, Atom-Economical Reaction

“…Additionally, X-ray photoelectron spectroscopy (XPS) of the carbon (C) and nitrogen (N) 1s regions (Figure S19) is representative of HDA binding environments according to previous literature reports. ,, Of note, the Cu and P 2p binding region (Figure A and B) demonstrates the characteristic Cu 3– x P environments, ,− while the satellite Cu­(II) peak (Figure B) and P–O peak at 134 eV likely corresponds to surface oxides. − , Finally, Cu 3 PSe 4 was characterized with XPS for Cu, P, Se, and C bonding environments (Figure S20). The core bonding environments (Cu, P and Se) were consistent with previous reports of Cu 3 PSe 4 and Cu 3 PS 4 , − , whereas the C region had similar peaks to Cu 3– x P NPs but a decrease in the C-NH 2 environment (Figure S20D). In summary, the spectroscopic evidence mentioned above confirms the sample purity and provides evidence for the nanoparticle surface composition, an important component of the net reaction stoichiometry.…”

“…Ternary chalcogenide nanoparticles (NPs) have recently gained considerable interest owing to their promising properties for technologically relevant applications, such as photovoltaics, − thermoelectrics, − and cathode materials. − Of particular interest is copper selenophosphate, Cu 3 PSe 4 , with its theoretical photovoltaic efficiency of 24% and earth abundant elemental composition. , Historical strategies targeting Cu 3 PSe 4 classically involve high temperature solid-state synthetic schemes from traditional elemental precursors (Table S1). ,,− A more recent solution-based synthesis of Cu 3 PSe 4 NPs from Lee et al achieved selenization of presynthesized Cu 3 P NPs in a one-pot heating method, using a 0.1 M Se 0 powder (Se 0 powder ) and 1-octadecene (1-ODE) solution .…”

Copper Tetraselenophosphate Cathode for Rechargeable Magnesium Batteries: A Redox-Active Polyatomic Anion Strategy to Design the Cathode Material

“…The content of Cu 3 PSe 4 is 89.50% determined by thermogravimetric analysis (TGA, Figure S3). As shown in Figure d, the two bands at 932.6 and 952.4 eV are, respectively, assigned to 2p 3/2 and 2p 1/2 of Cu + , confirming the valence state of Cu (+1) . The peaks at 131.4 and 132.3 eV of the P 2p XPS spectra can be, respectively, attributed to 2p 3/2 and 2p 1/2 of PSe 4 3– (Figure e) .…”

“…As shown in Figure 2d, the two bands at 932.6 and 952.4 eV are, respectively, assigned to 2p 3/2 and 2p 1/2 of Cu + , confirming the valence state of Cu (+1). 17 The peaks at 131.4 and 132.3 eV of the P 2p XPS spectra can be, respectively, attributed to 2p 3/2 and 2p 1/2 of PSe 4 3− (Figure 2e). 18 Slight surface oxidation is noted by the peak at ∼135 eV.…”

A Ternary Metal Oxide-Reduced Graphene Oxide Composite as High Capacity and Durable Anode for Li-Ion Batteries

“…These components are observed very clearly in the same electrolyte in our earlier studies. 47 When FEC is used as an additive, it gets reduced preferentially and forms more of the fluorinated component LiF compared to the electrolyte without an additive which is more stable compared to the organic components. 48 The use of FEC as an additive in the electrolyte improves the cycling performance (Fig.…”