Integrated Photothermal Desalination–Thermo-Electrochemical System Enabled by Cobalt Oxide–Graphite Felt Electrodes

Tailored water–surface interactions on cobalt oxide for stable proton-exchange-membrane water electrolysis

Numerical Analysis of Solution Precursor High-Velocity Oxy-Fuel (SP-HVOF) Spraying for the Development of Lithium Cobalt Oxide (LCO) Coatings

Abstract In recent years, oxychloride‐based materials have emerged as a promising solid‐state electrolyte (SSE) candidate owing to its ultrahigh ionic conductivity and decent cathode compatibility. Although the fabrication of SSE coatings for cathode materials has been recognized as a promising strategy, a precise synthesis of oxychloride‐based SSE coating is still not realized due to the lack of appropriate preparation method. As a proof of concept, we propose a superior lithium‐ion conductive aluminum‐based oxychloride (LAOC) coating synthesized by atomic level fabrication strategy with unique self‐limiting reaction mechanism. The LAOC modified lithium cobalt oxide (LCO) cathode exhibits a high capacity retention of 86.4% after 500 cycles at 5 C and significantly improved high‐voltage cycling stability. The outstanding performance is ascribed to the high interfacial ionic conductivity and construction of robust cathode electrolyte interphase. The ionic conductivity of LCO increased from 1.785 × 10 −7 to 2.823 × 10 −6 S cm −1 after LAOC coating. Scanning transmission X‐ray microscopy and transmission electron microscopy reveal that the LAOC coating suppresses interfacial degradation and mitigates the structural collapse of LCO. This study offers great opportunity for the atomic level fabrication of superior ionic conductive oxychloride thin films to realize high performance lithium‐ion batteries.

In recent years, oxychloride-based materials have emerged as a promising solid-state electrolyte (SSE) candidate owing to its ultrahigh ionic conductivity and decent cathode compatibility. Although the fabrication of SSE coatings for cathode materials has been recognized as a promising strategy, a precise synthesis of oxychloride-based SSE coating is still not realized due to the lack of appropriate preparation method. As a proof of concept, we propose a superior lithium-ion conductive aluminum-based oxychloride (LAOC) coating synthesized by atomiclevel fabrication strategy with unique self-limiting reaction mechanism. The LAOC modified lithium cobalt oxide (LCO) cathode exhibits a high capacity retention of 86.4% after 500 cycles at 5 C and significantly improved high-voltage cycling stability. The outstanding performance is ascribed to the high interfacial ionic conductivity and construction of robust cathode electrolyte interphase. The ionic conductivity of LCO increased from 1.785×10-7 to 2.823×10-6 S cm-1 after LAOC coating. Scanning transmission X-ray microscopy and transmission electron microscopy reveal that the LAOC coating suppresses interfacial degradation and mitigates the structural collapseof LCO. This study offers great opportunity for the atomic level fabrication of superior ionic conductive oxychloride thin films to realize high performance lithium-ion batteries.

High-performance supercapacitor electrodes based on binder-free electrodeposited polypyrrole-coated feather-like cobalt oxide nanostructures

Instigating the mixed phases of cobalt oxide in nanowires for electrolysis of urea-based water

Experimental and environmental impact of early-stage lithium recovery in lithium-ion battery recycling.

Lithium nickel manganese cobalt oxide (NMC811) has emerged as a promising cathode material for next-generation lithium-ion batteries. This study presents a comprehensive investigation of NMC811 synthesis via single-step spray pyrolysis...

Tailoring acid-base sites and oxygen vacancies in boron- and sulfur-integrated cobalt oxide for high-performance NaBH4 dehydrogenation

Cobalt oxide synthesis via flame spray pyrolysis for enhanced oxygen evolution reaction activity

Direct regeneration has emerged as a budding strategy for recycling spent lithium-ion batteries, yet restoring the degraded crystal structure of the cathode remains a momentous handicap. Here, a novel deep eutectic solvent rich in lithium (Li) is developed that not only induces the formation of an adaptive local ectopic structure (ALES) characterized by disordered and localized cations, but also facilitates the separation of cathode sheets and replenishes depleted elements. Within ALES, ectopic cobalt (Co) sites boost Li+ diffusion by expanding the Li slab and forming octahedral coordination with low-spin Co3+, while ectopic Li modulates Co─O interactions, collaboratively impeding long-range structural disorder, mitigating lattice stress, and reducing charge density fluctuations. The synergistic interaction between the ectopic Co and Li enables in situ structural repair of spent lithium cobalt oxide (LCO), thereby restoring crystallinity and enhancing electrochemical performance. The regenerated LCO delivers a reversible capacity of 183.08 mAh g-1 at 0.2 C, with 87.01% capacity retention after 200 cycles at 0.5 C, outperforming commercial counterparts. This study offers a new pathway for addressing an urgent bottleneck in structure-targeted LIB regeneration.

Singlet oxygen mediated ciprofloxacin degradation via manganese-doped cobalt oxide catalysis with peroxymonosulfate for water purification.

Tuning the properties of cobalt oxide thin films via precursor solution engineering for high-performance supercapacitor applications

Strontium cobalt oxide spinel as a promising electrode material for next-generation batteries

Dual-defects Stimulating catalytic site activity to enhance oxygen evolution performance of cobalt oxide

Facile synthesis of ternary graphene oxide supported metal doped cobalt oxide nanostructures as an active electrode material for supercapacitor applications

This review evaluates the effectiveness of gaseous products derived from the pyrolysis of waste polymers (polyethylene (PE), polypropylene (PP), high-density polyethylene (HDPE) and waste tires) in reducing metal oxides (cobalt(III) oxide (Co₃O₄), nickel(II) oxide (NiO), bismuth(III) oxide (Bi₂O₃) and copper(II) oxide (CuO)). Owing to the high energy consumption and environmental impact of conventional reduction techniques, utilizing pyrolytic gases as an alternative reducing atmosphere is critical for sustainability and resource recovery. Experimental studies conducted using horizontal tube furnace systems have demonstrated that gas mixtures obtained from waste polymers — comprising mainly H₂, CH₄, C₂H₄ and aromatic hydrocarbons — can effectively reduce these metal oxides at relatively low temperatures. This review comparatively evaluates parameters influencing reduction efficiency, such as temperature, reactant ratio, heating rate, and gas composition, and provides detailed evaluations of product phases and microstructures through XRD, SEM, and EDS analyses. The findings reveal novel opportunities for waste management and sustainable metallurgy, establishing pyrolytic gases as a promising solution at scientific and industrial levels.

Background: Lignin valorization into high-value chemicals is crucial for sustainable development. This study focused on optimizing the catalytic conversion of benzyl phenyl ether (BPE), a lignin model compound, to vanillin and phenolic compounds. Methods: Hierarchical H-ZSM-5 was synthesized via a dual-template method and subsequently modified by wet impregnation with bimetallic cobalt and molybdenum oxides (CoMoO4/H-ZSM-5). Catalyst properties were thoroughly characterized using various techniques, including XRD, FTIR, XRF, N2-physisorption, and SEM-EDS mapping. Reaction conditions, specifically Co:Mo ratio, temperature, and reaction time, were optimized using the Box-Behnken design (BBD), and product yields were quantified by High-Performance Liquid Chromatography (HPLC). Findings: Characterization confirmed successful catalyst synthesis, organic template removal, and bimetal oxide incorporation without significant structural damage. Catalytic tests demonstrated 100% BPE conversion. The highest experimental vanillin yield achieved was 54.69%. BBD analysis revealed that the interaction between Co:Mo ratio and temperature, as well as the quadratic effect of Co:Mo ratio, were the most influential factors impacting product yields. The optimal parameters for maximizing vanillin and phenolic yield were determined to be a Co:Mo ratio of 3:7, a temperature of 169 °C, and a reaction time of 31 minutes. While the phenolic model showed a reasonable fit (R² = 0.76), the vanillin model exhibited a lower fit (R² = 0.34) with significant lack-of-fit. Conclusion: This research provides crucial insights into the efficient production of high-value chemicals from BPE, offering a comprehensive optimization approach for the CoMoO4/H-ZSM-5 catalytic system. Novelty/Originality of this article: This study represents a novel contribution to lignin valorization.

ABSTRACT Solid‐state lithium‐metal batteries (SSLBs) are considered as promising next‐generation energy storage systems due to their high energy density and substantially improved safety. However, the poor interfacial contact between electrodes and solid electrolytes leads to high internal impedance, low coulombic efficiency, and rapid capacity degradation. Herein, a novel organic co‐crystal (LiDFOB‐SN) containing lithium difluoro(oxalato)borate (LiDFOB) and succinonitrile (SN) is developed to establish cohesive contact at the electrode/electrolyte interface. The designed LiDFOB 0.5 ‐SN electrolyte shows a wide electrochemical window (anodic reduction potential >5.2 V) and high conductivity (0.56 mS·cm −1 at 30°C). Assembled with this electrolyte, lithium cobalt oxide (LiCoO 2 , LCO) || Li batteries cycled between 3.0 and 4.5 V exhibit a high‐capacity retention of over 87% after 500 cycles. The improved high‐voltage cycling performance originates from the designed solid electrolytes, which reduce irreversible phase transformation in cathode materials and suppress Li dendrite growth. Furthermore, operando Raman measurements and molecular dynamics simulations are combined to explore the Li‐ion transport mechanism, suggesting that Li‐ions tend to transport along the highly conductive grain boundaries of the polycrystalline LiDFOB‐SN. This work provides a comprehensive insight into the operation mechanisms of organic co‐crystal electrolytes, which can further enable high‐performance solid‐state Li‐metal batteries and promote their practical applications.