Fluoride Batteries

In article number 2200131, Atsushi Inoishi and co-workers investigate the discharge–charge performance of a fluoride battery using FeF₃ cathode for the first time. X-ray diffraction and X-ray adsorption spectroscopy reveal that FeF₃ is reduced to FeF₂ at the first-stage plateau and then to Fe metal at the second-stage plateau; it is also reveals that the reverse process proceed during charging.

Plasma treatment is a more promising approach for surface modification and material synthesis than chemical methods due to its shorter reaction time, high efficiency, nonpolluting processing, etc. Progress, types, and challenges of nonplatinum oxygen reduction electrocatalysts prepared by low temperature plasma technology are critically evaluated.

The functionalization of transition metal dichalcogenides (TMDs) with photoactive molecules targets the optimization of materials properties for energy-related applications. In this review, an insightful overview of recent progress in this field is presented, including an analytical preview of the different ways of TMDs modification and the physical processes that are responsible for charge transfer phenomena.

Owing to the great potential of photoelectrochemical cathodic protection (PECCP), a cutting-edge green metal anticorrosion technology, this review explains the fundamental reaction mechanism and related characteristics of PECCP systems in terms of both thermodynamics and kinetics, lists the key indexes for evaluating the performance, summarizes previous works on photoanode material modulation strategies, and proposes several important future development directions.

The discharge–charge performance of a fluoride battery using FeF₃ cathode is investigated for the first time. X-ray diffraction and X-ray adsorption spectroscopy reveal that FeF₃ is reduced to FeF₂ at the first-stage plateau and then to Fe metal at the second-stage plateau; they also reveal that the reverse process proceed during charging.

A competitive-reduction chemistry is proposed for Ni-doped FeS₂ (Ni-FeS₂) hydrogen evolution reaction catalyst exhibiting significantly enhanced anti-acid stability compared with FeS₂. Specifically, the competitive reduction reactions of HER and acid corrosion occur at the same S sites in Ni-FeS₂ significantly suppressing acid corrosion, while in FeS₂ the reactions occur at S and Fe sites, respectively, causing serious acid corrosion.

Herein, a model that shows how nanoparticles may be harnessed within materials, to modulate oxide ion transport properties, beyond their traditional role as catalytic centers is developed. This could inspire the design of new nanostructured oxide ion conductors for energy conversion applications.

Carbon-coated nanoscale NASICON-Na_3+yV_2−yMn_y(PO₄)₃ cathodes through sol–gel-assisted solid-state synthesis are tailored. They display enhanced cycling stabilities and rate performances compared with the bulk materials.

The surface chemistry on metal oxides is investigated toward its capability for sodium-ion storage. Excellent, self-improving sodiation rate capabilities in combination with high-capacity retention are related to surface film formation with inorganic compounds. Initially formed Na₂O₂ reversibly converts to NaO₂ upon desodiation.

Energy and charge transfer coexist and compete during the interfacial charge dynamics at nonfullerene acceptor (NFA)-based donor/acceptor interfaces. By strengthening the NFA molecular electron push ability, competition between charge and energy transfer presents a nonmonotonous behavior; by strengthening the electron pull ability, charge transfer is always promoted and energy transfer is correspondingly inhibited.

Nb₂O₅/g-C₃N₄ type-II heterojunction adjusts the production of active substances used for selective oxidation and promotes the separation and transformation of photoexcited carriers. The degree of H₂O₂ inhibition is about 7.7-fold, thus further inhibiting the formation of ·OH. The system achieves an outstanding 2,5-diformylfurane selectivity of >99%, and an hydroxymethylfurfural conversion (53%) approximately 3 times that of g-C₃N₄ under simulated sunlight.

An attractive nonmetallic plasma S-scheme photocatalyst with a WO_3−x /S-doped g-C₃N₄ (WO_3−x /SC₃N₄) heterogeneous structure is reported. It can efficiently capture the photon energy from the UV-to-NIR region with the concomitant effect of improved carrier dynamics to facilitate the production of long-lived active carriers for photocatalytic degradation of Pharmaceuticals and personal care products.