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Improving the energy storage density of dielectrics without sacrificing charge-discharge energy storage efficiency and reliability is crucial to the performance improvement of modern electrical and electronic systems, but traditional methods of doping high-dielectric ceramics cannot achieve high energy storage densities without sacrificing reliability and storage efficiency. Here, an all-organic energy storage dielectric composed of ferroelectric and linear polymer with a sandwich structure is proposed and successfully prepared by the electrostatic spinning method. Additionally, the effect of the ferroelectric/linear volume ratio on the dielectric properties, breakdown, and energy storage is systematically studied. The results show that the structure has good energy storage characteristics with a high energy storage density (9.7 J/cm) and a high energy storage efficiency (78%). In addition, the energy storage density of the composite dielectric under high energy storage efficiency (90%) is effectively improved (25%). This result provides theoretical analysis and experience for the preparation of multilayer energy storage dielectrics which will promote the development and application of energy storage dielectrics.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7564590 | PMC |
http://dx.doi.org/10.3390/polym12091972 | DOI Listing |
Discov Nano
September 2025
Henan Key Laboratory of Diamond Optoelectronic Materials and Devices, Key Laboratory of Integrated Circuit, Ministry of Education, School of Physics, Zhengzhou University, Zhengzhou, 450052, China.
A cost-effective and large-scale method for synthesizing ZnCoO nanoflowers with surface oxygen vacancies as electrode materials for supercapacitors is presented. The existence of oxygen vacancies on the surface of the ZnCoO nanoflowers has been confirmed through X-ray photoelectron spectroscopy (XPS). The energy bands and density of states (DOS) of ZnCoO are examined using density functional theory, revealing that treatment with NaBH reduces the band gap of ZnCoO while increasing the DOS near the Fermi level compared to pristine ZnCoO.
View Article and Find Full Text PDFDiscov Nano
September 2025
RRU 709, Department of Clinical Pharmacology, Advanced Centre for Training, Research and Education in Cancer, Kharghar, Navi Mumbai, India.
In this study, we investigated the influence of ultrasonic frequency during ultrasound-assisted chemical bath deposition (UCBD) on the surface morphology and electrochemical performance of CoO:MnO@CoMnO composite flexible electrodes for supercapacitor applications. By systematically varying the ultrasonic frequency (1.0-2.
View Article and Find Full Text PDFNanomicro Lett
September 2025
College of New Materials and New Energies, Shenzhen Technology University, Lantian Road 3002, Pingshan, 518118, Shenzhen, People's Republic of China.
The introduction of two-dimensional (2D) perovskite layers on top of three-dimensional (3D) perovskite films enhances the performance and stability of perovskite solar cells (PSCs). However, the electronic effect of the spacer cation and the quality of the 2D capping layer are critical factors in achieving the required results. In this study, we compared two fluorinated salts: 4-(trifluoromethyl) benzamidine hydrochloride (4TF-BA·HCl) and 4-fluorobenzamidine hydrochloride (4F-BA·HCl) to engineer the 3D/2D perovskite films.
View Article and Find Full Text PDFJ Phys Chem Lett
September 2025
Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao East Road, Taipei 106, Taiwan.
Sugarcane () was employed as a sustainable carbon source to synthesize three-dimensional (3D) spherical manganese carbonate (MnCO) microspheres, offering a green route to advanced electrode material for high-energy-density symmetric supercapacitors. Although numerous synthesis strategies and material modifications have been explored, a detailed evaluation of environmentally friendly synthesis pathways remains essential. In this study, MnCO microspheres were successfully synthesized via a sugar-derived green synthesis followed by hydrothermal treatment.
View Article and Find Full Text PDFNano Lett
September 2025
School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan, Hubei 430070, China.
Aqueous zinc-ion batteries (AZIBs) represent an environmentally benign energy storage alternative. However, the VO cathode suffers from limited cycling stability and rate capability due to structural instability, vanadium dissolution, and high desolvation energy caused by the large size of [Zn(HO)] deintercalation. Address these issues, we introduce a VO/VOPO (VOP) heterostructure that that reinforces the crystal structure to suppress vanadium dissolution and establishes a hydrophilic interface reducing the desolvation energy of Zn.
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