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The development of aqueous potassium-ion batteries is limited by the lack of suitable anode materials. Here, a novel anode material, iron phosphate hydroxide hydrate FePO(OH)(HO), was introduced and synthesized, which delivers considerable reversible capacities of 80 mA h g at 0.05 A g. An aqueous full potassium-ion battery assembled with the KZn(Fe(CN)) cathode exhibits 80% capacity retention after 1000 cycles.
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http://dx.doi.org/10.1039/d2cc01798a | DOI Listing |
RSC Adv
September 2025
State Key Laboratory of Disaster Prevention & Reduction for Power Grid Changsha China
Positive temperature coefficient (PTC) materials are pivotal for safeguarding lithium iron phosphate batteries, yet their industrial application is hindered by critical drawbacks: excessive film thickness, high internal resistance, and poor solvent sustainability. Addressing these challenges, this study innovatively develops a solvent-free thermal rolling process to fabricate an asymmetric expansion polymer film, specifically thermoplastic polyurethane (TPU) reinforced polyethylene (PE)/carbon composites, which significantly enhances the PTC effect. The core mechanism lies in the asymmetric thermal expansion of TPU and PE: this unique behavior disrupts the conductive carbon network, triggering a sharp PTC transition at around 120 °C.
View Article and Find Full Text PDFBioresour Technol
September 2025
Department of Earth Resources and Environmental Engineering, Hanyang University, Seoul 04763, Republic of Korea. Electronic address:
The rapid increase of electronic waste, particularly battery waste, presents significant environmental challenges such as pollutant emissions and resource depletion, emphasizing the need for effective valorization and reuse strategies. This study introduces a novel approach for repurposing end-of-life lithium iron phosphate (LFP) batteries as catalysts in the pyrolysis of walnut shells (WS). Characterization analyses revealed that LFP provides both Lewis and Brønsted acid sites, which alter the thermal decomposition pathway of WS.
View Article and Find Full Text PDFJ Sci Food Agric
September 2025
College of Ecology and Environment, Central South University of Forestry and Technology, Changsha, China.
Background: Iron plaque on the rice rhizoplane could potentially prevent cadmium (Cd) entry into plant roots. A hydroponic experiment was conducted to study the morphological characteristics and mineral compositions of iron plaque, Cd immobilization mechanism by iron plaque, and its effect on Cd uptake and transport in rice.
Results: Exogenous divalent iron ion (Fe(II)) could induce the formation of deep-red iron plaque on rice rhizoplane, which primarily consisted of ferrihydrite, goethite, hematite, iron phosphate, and iron sulfate compounds.
Water Res
August 2025
State Key Laboratory of Water Pollution Control and Green Resource Recycling, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China. Electronic address:
Anaerobic co-digestion of sulfur-containing organic wastes with waste-activated sludge containing iron-phosphorus compounds (FePs) was recently suggested as an environment-friendly strategy to promote phosphate release, energy recovery, and hydrogen sulfide (HS) control. Nevertheless, the mechanistic coupling between FePs speciation and the concurrent transformation of carbon, sulfur, iron, and phosphorus within this system remains to be fully elucidated. To address this knowledge gap, methionine, a typical hydrolysis product of sulfur-containing organics, and five FePs prevalent in sludge (ferric-phosphate tetrahydrate (FePO⋅4HO), ferric-phosphate dihydrate (FePO⋅2HO), vivianite (Fe(PO)·8HO), phosphate coprecipitated with Fe(III) (COP-P), and phosphate adsorption on hydrous ferric oxide (HFO-P)) were selected to elucidate C-S-Fe-P transformations in this study.
View Article and Find Full Text PDFLangmuir
September 2025
School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun, Jilin 130022, P.R. China.
Amidst global sustainability imperatives, this study pioneers a solid-state regeneration strategy that transforms spent LiCoO (LCO) cathodes into high-performance materials via amorphous lithium iron phosphate glass (LFPg)-driven structural reconfiguration. Unlike conventional recycling that decomposes cathodes, our approach leverages LFPg's defect-rich framework, high ionic conductivity, and dynamic interfacial activity to directly reconstruct degraded LCO crystals. The LFPg acts as a multifunctional repair agent: creating Li diffusion channels through disorder engineering, eliminating oxygen vacancies via atomic oxygen transfer, scavenging impurities (e.
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