Facile Construction of Carbon Encapsulated of Earth‐Abundant Metal Sulfides for Oxygen Electrocatalysis

Abstract

Transition metal sulfide (TMS) promises an excellent prospect in electrocatalysis with high intrinsic activity but poor conductivity. In this work, a series of TMS wrapped by a thin carbon layer with enhanced conductivity have been developed by a facile and rapid strategy. Among them, the prepared CoSx compound exhibits the optimal ORR and OER performances because of the synergistic effect between the high intrinsic activity of CoSx and the desirable conductivity of carbon layer. More importantly, the CoSx‐based zinc‐air batteries (ZABs) exhibit a current density of 10 mA cm−2 with voltage gap of 0.8 V and remarkable cycling durability, which is comparable to those of the state‐of‐art noble Pt/C+IrO2 batteries. Therefore, this work introduces a facile route that opens up a new horizon and inspiration for the development of sulfide for energy conversion.

Cu/Co/CoS2 embedded in S,N-doped carbon as highly efficient oxygen reduction and evolution electrocatalyst for rechargeable zinc–air batteries

“…60 (iii) The improved performance of S-doped over undoped S materials indicates that the interaction between the sulfide and carbon layers promotes the cleavage of O-O bonds to have low activation barriers. 61,62 C-S is considered to effectively render high spins in surrounding C atoms and facilitate the ORR reaction process thereby. 63 This corresponds to a lower disordered C content of 54% for Cu/Co@NC than that of Cu/Co/CoS 2 @S,N-C (61%) in the XPS results (Fig.…”

Review—Oxygen Electrocatalysts based on Various Modulation Strategies for Rechargeable Li-O2 Batteries

“…However, the inherent limitation of poor electrical conductivity and high rates of agglomeration problems hinder its application to a certain extent. 156,157 To overcome this limitation, the auxiliary of carbon-based materials to form metal compounds/carbon composites is an effective strategy. Up to now, various carbon-based materials (such as carbon nanotube, 158 nanofiber, 159 and graphene 160 etc.)…”

TiO2 nanoarrays modification by a novel Cobalt-heteroatom doped graphene complex for photoelectrochemical water splitting: An experimental and theoretical study

“…The production of green, low-cost, storable, and renewable chemical fuels is a significant challenge for scientists and researchers [1,2]. The ideal way to generate energy is to use low-cost energy sources and more available raw materials.…”