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Cheng Y, Yu G. Power Frequency Breakdown Properties of LDPE-Doped Inorganic Nanoparticles. Molecules 2025; 30:1914. [PMID: 40363719 PMCID: PMC12073233 DOI: 10.3390/molecules30091914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2025] [Revised: 04/09/2025] [Accepted: 04/22/2025] [Indexed: 05/15/2025] Open
Abstract
Although polyethylene is widely used in electrical insulation, it does not possess dielectric properties. It is therefore desirable to develop insulation materials with excellent dielectric properties. In this study, low-density polyethylene (LDPE) was used as a matrix resin, while MgO, wollastonite, and montmorillonite (MMT) were employed as inorganic nano-additives. Three composites were prepared using the boiling-melt blending approach. Power frequency breakdown tests were performed on the original LDPE and on the prepared nanoparticle/LDPE composites. Upon combination with the Weibull distribution, the breakdown test results revealed that the addition of these nano-additive particles to the LDPE matrix increased the breakdown field strength of the material. The highest breakdown field strength for the nano-MgO/LDPE composite was obtained using a MgO loading of 0.5%. Notably, the obtained value was 1.8% higher than that of the pure LDPE. In addition, the highest breakdown field strength for the nano-wollastonite/LDPE composite was obtained using a wollastonite loading of 1% (7.48% higher than that of pure LDPE). Similarly, the highest breakdown field strength of the nano-MMT/LDPE composite was obtained using an MMT loading of 3%, giving a value that was 6.67% higher than that of the pure LDPE.
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Affiliation(s)
| | - Guang Yu
- Mechanical and Electrical Engineering Institute, University of Electronic Science and Technology of China Zhongshan Institute, Zhongshan 528400, China;
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Hun Q, Lan L, Lu X, Hu Q, Liang X, Guo Y, Wang Y. Bilayer Heterostructure Electrolytes Were Prepared by a UV-Curing Process for High Temperature Lithium-Ion Batteries. Polymers (Basel) 2024; 16:2972. [PMID: 39518182 PMCID: PMC11548415 DOI: 10.3390/polym16212972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2024] [Revised: 10/16/2024] [Accepted: 10/21/2024] [Indexed: 11/16/2024] Open
Abstract
Solid-state electrolytes are widely anticipated to revitalize high-energy-density and high-safety lithium-ion batteries. However, low ionic conductivity and high interfacial resistance at room temperature pose challenges for their practical application. In this work, the dual-matrix concept is applied to the design of a bilayer heterogeneous structure. The electrolyte in contact with the cathode blends PVDF-HFP and oxidation-resistant PAN. In contrast, the electrolyte in contact with the anode blends PVDF-HFP and reduction-resistant PEO. A UV-curing process was used to fabricate the bilayer heterostructure electrolyte. The heterostructure electrolyte exhibits an ionic conductivity of 4.27 × 10-4 S/cm and a Li+ transference number of 0.68 at room temperature. Additionally, when assembled into LiFePO4/CPEs/Li batteries, it shows a high initial discharge capacity at room temperature (168 mAh g-1 at 0.1 C and 60 mAh g-1 at 2 C), with a capacity retention of 93.3% after 100 cycles at a current density of 0.2 C. Notably, at 60 °C, the battery maintains a discharge capacity of 90 mAh g-1 at 2 C, with a capacity retention of 97.4% after 100 cycles at 0.2 C. Therefore, solid-state batteries using this bilayer heterogeneous structure electrolyte demonstrate promising performance, including effective capacity output and cycling stability.
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Affiliation(s)
- Qiankun Hun
- Guangxi Key Laboratory of Automobile Components and Vehicle Technology, Guangxi University of Science & Technology, Liuzhou 545006, China; (Q.H.); (L.L.); (X.L.); (X.L.); (Y.W.)
| | - Lingxiao Lan
- Guangxi Key Laboratory of Automobile Components and Vehicle Technology, Guangxi University of Science & Technology, Liuzhou 545006, China; (Q.H.); (L.L.); (X.L.); (X.L.); (Y.W.)
| | - Xuanan Lu
- Guangxi Key Laboratory of Automobile Components and Vehicle Technology, Guangxi University of Science & Technology, Liuzhou 545006, China; (Q.H.); (L.L.); (X.L.); (X.L.); (Y.W.)
| | - Qicheng Hu
- Guangxi Key Laboratory of Automobile Components and Vehicle Technology, Guangxi University of Science & Technology, Liuzhou 545006, China; (Q.H.); (L.L.); (X.L.); (X.L.); (Y.W.)
| | - Xinghua Liang
- Guangxi Key Laboratory of Automobile Components and Vehicle Technology, Guangxi University of Science & Technology, Liuzhou 545006, China; (Q.H.); (L.L.); (X.L.); (X.L.); (Y.W.)
| | - Yifeng Guo
- School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
| | - Yujiang Wang
- Guangxi Key Laboratory of Automobile Components and Vehicle Technology, Guangxi University of Science & Technology, Liuzhou 545006, China; (Q.H.); (L.L.); (X.L.); (X.L.); (Y.W.)
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Tan Y, Deng J, Gao H, Feng Z, Lu L, Wang J, Pan Z, Yao L, Deng Q. Research on the energy storage performance of laminated composites based on multidimensional co-design in a broad temperature range. NANOSCALE 2024; 16:8455-8461. [PMID: 38577747 DOI: 10.1039/d4nr00189c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/06/2024]
Abstract
Polymer dielectrics play an irreplaceable role in electronic power systems because of their high power density and fast charge-discharge capability, but it is limited by their low stability in the temperature range of 25-200 °C. Rather than the introduction of one-dimensional fillers in polymers, we used a kind of multidimensional synergistic design to prepare Al2O3-TiO2-Al2O3/PI composites with layered structures by introducing multi-dimensional materials in polyimide (PI). In fact, the composite achieves much higher temperature stability than the pure PI film. The optimally proportioned composite has an energy density of 3.41 J cm-3 (vs. 1.48 J cm-3 for pure PI) even at 200 °C. Additionally, it reaches an impressive energy density retention of up to 90% and maintains an energy efficiency as high as 86% at 400 MV m-1 in the temperature range of 25-200 °C. The multidimensional coordination design is proposed to obtain composite films, and provides a feasible strategy in the study of polymer-based composites with high-temperature performance.
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Affiliation(s)
- Yipeng Tan
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, P. R. China.
- Research Center for Advanced Information Materials, Huangpu Research & Graduate School of Guangzhou University, Guangzhou 510275, China
| | - Jiayu Deng
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, P. R. China.
| | - Hang Gao
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, P. R. China.
- Research Center for Advanced Information Materials, Huangpu Research & Graduate School of Guangzhou University, Guangzhou 510275, China
| | - Ziwen Feng
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, P. R. China.
- Research Center for Advanced Information Materials, Huangpu Research & Graduate School of Guangzhou University, Guangzhou 510275, China
| | - Linfei Lu
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, P. R. China.
- Joint Institute of Guangzhou University & Institute of Corrosion Science and Technology, Guangzhou University, Guangzhou 510275, China
- Research Center for Advanced Information Materials, Huangpu Research & Graduate School of Guangzhou University, Guangzhou 510275, China
| | - Jiheng Wang
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, P. R. China.
| | - Zhongbin Pan
- School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
| | - Lingmin Yao
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, P. R. China.
- Joint Institute of Guangzhou University & Institute of Corrosion Science and Technology, Guangzhou University, Guangzhou 510275, China
- Research Center for Advanced Information Materials, Huangpu Research & Graduate School of Guangzhou University, Guangzhou 510275, China
| | - Qinglin Deng
- School of Physics and Materials Science, Guangzhou University, Guangzhou 510006, P. R. China.
- Research Center for Advanced Information Materials, Huangpu Research & Graduate School of Guangzhou University, Guangzhou 510275, China
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