Enhanced Performance of Aprotic Electrolyte Li–O₂ Batteries with SnS₂–SnO₂/C Heterostructure as Efficient Cathode Catalyst

Abstract

In this work, few-layer structured graphene-like m-SnS 2 −SnO 2 /C materials were synthesized successfully with a facile hydrothermal reaction followed by heat treatment in an Ar atmosphere. In these materials, a SnS 2 −SnO 2 heterostructure modified with a carbon coating (SnS 2 −SnO 2 /C) has been fabricated, and their electrochemical performance as a cathode catalyst for aprotic electrolyte Li−O 2 batteries was evaluated and comparatively investigated. It was shown that the battery with 225-SnS 2 −SnO 2 /C in the cathode delivers the best performance. This work added a new promising index to the dictionary for developing highperformance cathode catalysts of Li−O 2 batteries.

One-Pot Hydrothermal Synthesis of Nickel Cobalt Telluride Nanorods for Hybrid Energy Storage Systems

“…Nowadays, transition metal chalcogenides (TMCs) play a major role in various technological fields, similar to supercapacitor, biosensor, batteries, solar cell, photodetectors, photocatalyst, and electrocatalyst for water splitting. − They show high electrical conductivity, excellent redox properties, low cost, and electrochemical activity. , Binary TMCs demonstrate the improved electrochemical redox behavior as a result of their reaction site and collective site that arise from the mixed valence cations. Among the TMCs, the Ni atom is stabilized in the 3 + oxidation state, which has more catalytic activity than Ni 2+ in alkaline medium.…”

Understanding the Photocatalytic Activity of Sodium Hexatitanate Nanoparticles for Pollutants Degradation: A Spectroscopic Insight

“…The first peak at 529.6 eV is due to structural oxygen (O 2– ) associated with the Ti 4+ (Ti–O bonds) chemical states on the titanate surface. , The intensity of the O 1s signal is higher in the MWH nit sample, linked with the highest intensity observed for the Ti 2p signal, which indicates that the surface environment is richer in Ti 4+ -O 2– and Na + -O 2– bonds as indicated by Zárate et al and confirms the formation of Na + –O-Ti 4+ bonds on the materials’ surface . In addition to the O 1s peak at 529.6 eV, the peaks observed at 531.8 and 533.2 eV can be assigned to the oxygen-deficient environments (due to Ti 4+ –V O ·· surface environments) as well as to the oxygen of hydroxyl groups (OH) from carboxyl groups (OC–OH) or from water adsorbed on the surface. , These results indicate that the higher number of oxygen vacancies (V O ·· ) and hydroxyl groups (OH) is formed from the synthesis of the samples performed using sodium acetate as a precursor ( MWH acet and CH acet ).…”

“…•• surface environments) as well as to the oxygen of hydroxyl groups (OH) from carboxyl groups (O�C−OH) or from water adsorbed on the surface. 36,37 These results indicate that the higher number of oxygen vacancies (V O…”

Understanding supercapacitive performance of a N-doped vanadium carbide/carbon composite as an anode material in an all pseudocapacitive asymmetric cell

“…2e, the core-level O 1s spectrum can be well fitted with peaks at binding energies of 530.4, 531.6, 532.1, and 533.1 eV and can be assigned to the superficial V–O, V–OH, CO, and C–O species, respectively. 21,25,26 Moreover, deconvolution of the N 1s spectrum, as depicted in Fig. 2f, results in three peaks centered around 397.3 eV, 399.2 eV, and 400.9 eV, indicating the presence of pyridinic-N (N-6), pyrrolic-N (N-5), and quaternary-N (N-Q) species, respectively.…”