Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
The major challenges in using NHVO as a cathode for aqueous zinc-ion batteries (AZIBs) are its unsatisfactory structural stability and carrier migration coefficient due to the accumulated lattice strain during cycling. Herein, we developed a KNa(NH)VO·0.63HO (NaKNVOH) cathode to achieve a continuous contribution of cathode structure for Zn storage at both low and high current density. Both experimental data and DFT calculations confirmed that the charge compensation of Na and K not only reinforced the host structure but also enriched the active sites for Zn migration. Especially, the structure-led charge compensation effectively alleviated the lattice strain accumulation during prolonged cycling. The NaKNVOH cathode delivered a specific capacity of 495.4 mAh g at 0.5 A g, a rate capability of 177.8 mAh g at 4 A g, and excellent cycle life and capacity retention at current densities of 0.5 A g (300 cycles, 94.2%) and 4 A g (2000 cycles, 96.57%).
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/d5dt01363a | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Surface-Driven Electron Localization and Defect Heterogeneity in Ceria.
J Am Chem Soc
September 2025
Kathleen Lonsdale Materials Chemistry, Department of Chemistry, University College London, London WC1H 0AJ, U.K.
The exceptional performance of ceria (CeO) in catalysis and energy conversion is fundamentally governed by its defect chemistry, particularly oxygen vacancies. The formation of each oxygen vacancy (V) is assumed to be compensated by two localized electrons on cations (Ce). Here, we show by combining theory with experiment that while this 1 V: 2Ce ratio accounts for the global charge compensation, it does not apply at the local scale, particularly in nanoparticles.
View Article and Find Full Text PDFPolymorph-Induced Reducibility and Electron Trapping Energetics of Nb and W Dopants in TiO.
J Phys Chem C Nanomater Interfaces
August 2025
Cardiff Catalysis Institute, School of Chemistry, Translational Research Hub, Cardiff University, Maindy Road, Cardiff CF24 4HF, U.K.
Controlling the formation of electron polarons in TiO doped with transition metals is important for the design of transparent conducting oxides for high-efficiency photovoltaics and photocatalysts with tunable reaction selectivities. In this work, EPR spectroscopy is combined with Hubbard-corrected density functional theory (DFT+), with refined atomic-like Hubbard projectors, to show the sensitivity of charge compensation in substitutionally doped Nb-TiO and W-TiO with respect to the TiO polymorph (, anatase or rutile). Both EPR magnetic tensors and DFT+predicted Nb 4 and W 5 orbital occupancies show the formation of differing dopant charge states depending on the TiO polymorph, with nonmagnetic Nb and W in doped anatase and paramagnetic Nb and W in doped rutile.
View Article and Find Full Text PDFProteo-transcriptomic reprogramming and resource reallocation define the aging mammalian brain.
bioRxiv
August 2025
Department of Neuro- and Sensory Physiology, University Medical Center Göttingen, 37073 Göttingen, Germany.
Brain aging is a major risk for neurodegeneration, yet the underlying molecular mechanisms remain poorly understood. Here we performed an integrative proteo-transcriptomic analysis of the aging mouse brain, uncovering molecular signatures of aging through the assessment of protein aggregation, mRNA relocalization, and comparative proteomics across eight models of premature aging and neurodegeneration. We identified dynamic changes in physiological aging highlighting differences in synaptic maintenance and energy-allocation.
View Article and Find Full Text PDFPine fruit activated carbon modified with CuCoSe for the application in high-performance battery-type supercapacitor.
Sci Rep
September 2025
Department of Chemistry, Isfahan University of Technology, Isfahan, 84156 - 83111, Iran.
Biomass has attracted considerable interest in the field of energy storage because of its outstanding characteristics, such as superior charge transport ability, affordability, eco-friendly, structural versatility, and renewability. Moreover, biomass-derived activated carbons, combined with pseudocapacitive materials, have recently gained popularity as efficient electrochemical components for energy storage devices. In this study, activated carbon was prepared from pinecone flowers as the biomass precursor through a process involving alkaline treatment and pyrolytic carbonization in an inert gas environment.
View Article and Find Full Text PDFUnder electron bombardment, electrically insulating samples accumulate a net charge which can adversely affect measurements in electron microscopy. Here, we present a preliminary study on gas-based charge compensation in TEM quantified through off-axis electron holography. Based on the present data, it appears that the introduction of a gas flow reversibly reduces the degree of charge buildup and fluctuations on a dielectric sample.
View Article and Find Full Text PDF