A unique hydrophilic/hydrophobic nanoporous double layer structure was designed for efficient and stable solar water evaporation distillation.

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Binary transition metal phosphides hold immense potential as innovative electrode materials for constructing high-performance energy storage devices. Herein, porous binary nickel-cobalt phosphide (NiCoP) nanosheet arrays anchored on nickel foam (NF) were rationally designed as self-supported binder-free electrodes with high supercapacitance performance. Taking the combined advantages of compositional features and array architectures, the nickel foam supported NiCoP nanosheet array (NiCoP@NF) electrode possesses superior electrochemical performance in comparison with Ni-Co LDH@NF and NiCoO2@NF electrodes. The NiCoP@NF electrode shows an ultrahigh specific capacitance of 2143 F g-1 at 1 A g-1 and retained 1615 F g-1 even at 20 A g-1, showing excellent rate performance. Furthermore, a binder-free all-solid-state asymmetric supercapacitor device is designed, which exhibits a high energy density of 27 W h kg-1 at a power density of 647 W kg-1. The hierarchical binary nickel-cobalt phosphide nanosheet arrays hold great promise as advanced electrode materials for supercapacitors with high electrochemical performance.

As eries of electrochromic electron-accepting poly-(chalcogenoviologen)s with multiple,s table,a nd reversible redox centers were used as anodic materials in organic radical lithium-ion batteries (ORLIBs). The introduction of heavy atoms (S,S e, and Te)i nto the viologen scaffold significantly improved the capacity and cycling stability of the ORLIBs. Notably,the poly(Te-BnV) anode was able to intercalate 20 Li ions and showed higher conductivity and insolubility in the electrolyte,t hus contributing to ar eversible capacity of 502 mAh g À1 at 100 mA g À1 when the Coulombic efficiency approached 100 %. The charged/discharged state of flexible electrochromic batteries fabricated from these anodic materials could be monitored visually owingt ot he unique electrochromic and redox properties of the materials.T his study opens ap romising avenue for the development of organic polymer-based electrodes for flexible hybrid visual electronics.Viologens (RV 2+ )a re electron-accepting organic molecules based on diquaternized 4,4'-bipyridine moieties.U nder an applied voltage or direct illumination, viologens can undergo at wo-step reversible one-electron reduction with obvious color changes.This phenomenon, commonly observed for the radical species of viologens (RV 2+ + e À $ RV + C;RV + C + e À $ RV), [1] has been explored in electrochromic devices (ECDs), [2] molecular machines, [3] and organic batteries, [4] among other applications. [5] Owing to their synthetic versatility and the ready tunability of their redox properties, [6] the development of viologen-based energy-storage devices has increased dramatically over the past decades. [7] Theexcellent redox properties and unique radical states of viologens make them exceptional electrode candidates for an ew generation of energy-storage devices,s uch as inorganic/organic Li/Na/ Mg ion batteries, [8] aqueous organic redox flow batteries, [9] organic radical batteries, [10] lithium-oxygen batteries, [11] and others. [12] As ap romising emerging technology for energy storage, [13] ORBs have shown several advantages as compared to previously reported inorganic [14] and polymeric materials, [15] such as no need for rare metals,r eady tunability of redox properties,g reater safety,a nd design flexibility at the molecular level, but the development of such batteries has still been limited. [16] Reported ORBs suffered from poor performance,f or example,l ow cell capacity and stability, owing to fewer redox states and low specific energy.T herefore,t he development of novel viologen derivatives with multiple stable redox centers and higher specific energy could dramatically enhance the performance and expand the limits of ORBs. [8c] Thei ntroduction of chalcogen atoms into organic conjugated scaffolds could enhance the electron mobility of the compounds in terms of greater mass and polarizability. [17] However,t he inherent toxicity and shortage of heavychalcogenide resources may limit their application. The development of novel chalcogenides with low toxicity,l ow chalcoge...

We found that Ni(OH)2 nanosheets of Ni(OH)2/NOSCF decorated with ∼3.3 nm CeO2 NPs displayed enhanced OER performance.

Nitrogen-doped graphene hydrogels were synthesized using amino acids as doping agents. The acidity of the amino acid affects the morphology and ultimately the electrochemical performance of the material.

Owing to the unique electronic properties, rare‐earth modulations in noble‐metal electrocatalysts emerge as a critical strategy for a broad range of renewable energy solutions such as water‐splitting and metal–air batteries. Beyond the typical doping strategy that suffers from synthesis difficulties and concentration limitations, the innovative introduction of rare‐earth is highly desired. Herein, a novel synthesis strategy is presented by introducing CeO2 support for the nickel–iron–chromium hydroxide (NFC) to boost the oxygen evolution reaction (OER) performance, which achieves an ultralow overpotential at 10 mA cm−2 of 230.8 mV, the Tafel slope of 32.7 mV dec−1, as well as the excellent durability in alkaline solution. Density functional theory calculations prove the established d–f electronic ladders, by the interaction between NFC and CeO2, evidently boosts the high‐speed electron transfer. Meanwhile, the stable valence state in CeO2 preserves the high electronic reactivity for OER. This work demonstrates a promising approach in fabricating a nonprecious OER electrocatalyst with the facilitation of rare‐earth oxides to reach both excellent activity and high stability.

Uniform 3D MoSe2 layered nanostructures grown on graphene nanosheets to form high quality MoSe2/graphene hybrid nanostructures were synthesized by using a facile wet chemistry strategy.