A5006050235- Dielectric materials and actuators
- Flame retardant materials and properties
- Advanced Sensor and Energy Harvesting Materials
- Ferroelectric and Piezoelectric Materials
- biodegradable polymer synthesis and properties
- Carbon dioxide utilization in catalysis
- Thermal properties of materials
- Fiber-reinforced polymer composites
- Conducting polymers and applications
- Synthesis and properties of polymers
- Polymer Nanocomposite Synthesis and Irradiation
- Advanced Battery Materials and Technologies
- Advanced battery technologies research
- Supercapacitor Materials and Fabrication
- Advanced Battery Technologies Research
- Epoxy Resin Curing Processes
- Advancements in Battery Materials
- Fire dynamics and safety research
- Electromagnetic wave absorption materials
- Microwave Engineering and Waveguides
- Synthesis of Organic Compounds
- Thermal Radiation and Cooling Technologies
- Heat Transfer and Optimization
- Polymer Nanocomposites and Properties
- Polyoxometalates: Synthesis and Applications
University of California, Los Angeles
2024
Shanghai Jiao Tong University
2016-2024
California NanoSystems Institute
2024
Samueli Institute
2024
Materials Sciences (United States)
2024
Ningbo Institute of Industrial Technology
2013-2014
Chinese Academy of Sciences
2012-2014
Thermally conductive but electrically insulating polymer composites are highly desirable for thermal management applications because of their wide range utilization, ease processing, and low cost. However, the traditional approaches to thermally usually suffer from conductivity enhancement and/or deterioration electrical property. In this study, using cellulose nanofiber‐supported 3D interconnected boron nitride nanosheet (3D–C–BNNS) aerogels, a novel method epoxy nanocomposites is reported....
The continuous evolution toward semiconductor technology in the "more-than-Moore" era and rapidly increasing power density of modern electronic devices call for advanced thermal interface materials (TIMs). Here, we report a novel strategy to construct flexible polymer nanocomposite TIMs management applications. First, aligned polyvinyl alcohol (PVA) supported interconnected 2D boron nitride nanosheets (BNNSs) composite fiber membranes were fabricated by electrospinning. Then, constructed...
Abstract Polymer dielectrics such as poly(vinylidene fluoride) (PVDF) have drawn tremendous attention in high energy density capacitors because of their dielectric constant and ease processing. However, the discharged attained with these materials is restrained by inferior breakdown strength electric resistivity. Herein, PVDF composite films a nanosized interlayer assembled boron nitride nanosheets (BNNSs) that aligned along in‐plane direction are prepared through simple layer‐by‐layer...
Thermal management has become a crucial problem for high-power-density equipment and devices. Phase change materials (PCMs) have great prospects in thermal applications because of their large capacity heat storage isothermal behavior during phase transition. However, low intrinsic conductivity, ease leakage, lack flexibility severely limit applications. Solving one these problems often comes at the expense other performance PCMs. In this work, we report core-sheath structured nanocomposites...
Ultrathin and super-toughness gel polymer electrolytes (GPEs) are the key enabling technology for durable, safe, high-energy density solid-state lithium metal batteries (SSLMBs) but extremely challenging. However, GPEs with limited uniformity continuity exhibit an uneven Li+ flux distribution, leading to nonuniform deposition. Herein, a fiber patterning strategy developing engineering ultrathin (16 µm) fibrous high ionic conductivity (≈0.4 mS cm-1 ) superior mechanical toughness (≈613%)...
High-temperature dielectric polymers are becoming increasingly desirable for capacitive energy storage in renewable utilization, electrified transportation, and pulse power systems. Current typically require robust aromatic molecular frameworks to ensure structural thermal stability at elevated temperatures. Nevertheless, the introduction of units compromises electrical insulation owing pronounced π─π interactions that facilitate electron transport eliminate breakdown self-healing property...
Abstract The heterogeneity, species diversity, and poor mechanical stability of solid electrolyte interphases (SEIs) in conventional carbonate electrolytes result the irreversible exhaustion lithium (Li) during cycling, hindering practical applications Li metal batteries (LMBs). Herein, this work proposes a solvent‐phobic dynamic liquid interphase (DLEI) on (Li–PFbTHF (perfluoro‐butyltetrahydrofuran)) surface that selectively transports salt induces salt‐derived SEI formation. DLEI with...
An efficient solution has been built for the chemical recycling of carbon fiber/epoxy composites by oxidative degradation under mild conditions with acetone and H2O2. Clean CF can be obtained after reacting at 60 °C 30 min. The decomposition ratio epoxy is above 90%, strength remains more than 95% its original strength.
Adv. Energy Mater. 2019, 9, 1901826 DOI: 10.1002/aenm.201901826 On page 3, the Weibull statistical distribution formula is incorrect, corrected version is, P E = 1 − exp / b β 4, Figure S4 erroneously referenced. The relevant sentences are to, “The high electric field energy storage performance was then assessed with D-E (electric displacement as a function of field) loop measurement (Figure S3, Supporting Information)” “For instance, under 320 MV m−1, while PVDF has Pr 0.03 C m−2, composite...
Flexible dielectric materials with high electrical energy densities are of crucial importance in advanced electronics and electric power systems. The conventional methods for fabricating flexible introducing zero-, one-, three-dimensional high-k inorganic nanofiller into a polymer matrix while less two-dimensional nanofillers were included. Herein, (2D) titanium dioxide nanosheets prepared by one-step hydrothermal reaction utilized to boost the storage performance nanocomposites. It was...
Introducing a high dielectric constant (high-<italic>k</italic>) nanofiller into polymer is the most common way to achieve flexible nanocomposites for electrostatic energy storage devices.
Dielectric polymer nanocomposites are considered as one of the most promising candidates for high-power-density electrical energy storage applications. Inorganic nanofillers with high insulation property frequently introduced into fluoropolymer to improve its breakdown strength and capability. Normally, inorganic thought introducing traps matrix suppress leakage current. However, how these effect current is still unclear. Meanwhile, dopant (> 5 vol%) prerequisite distinctly improved...
A highly efficient intumescent flame retardant (IFR) system for polypropylene is constructed by adding a polyoxometalate based ionic liquid (PIL) into conventional PP/IFR composites. The PP composite with 14.5 wt% IFR and 0.5 PIL can pass the UL-94 V-0, while that single more than 25 wt%.
Abstract Relaxor ferroelectric polymers exhibiting a giant electrocaloric effect (ECE) can potentially be used to create next‐generation solid‐state coolers. Under an electric field, poly(vinylidene fluoride‐trifluoroethylene‐chlorofluoroethylene) terpolymer goes through large dipolar entropy change producing high adiabatic temperature (Δ T ECE ). This work resolves the molecular origins of behind field‐induced dipole switching. A Fourier transform infrared spectroscopy equipped with voltage...
Aqueous supercapacitors (SCs) are highly desirable as the next generation of energy storage devices, holding promise being environmentally friendly and free safety concerns. However, their low water-splitting voltage prevents practical applications. Here, we utilize a dielectric-polymer-coated, hierarchically structured carbon electrode to prepare dielectric-electrolyte SC (DESC), which exhibits an ultra-high stable operating 3 V. The facile design polymeric superstructure, covalently bonded...
Three polyoxometalates-based ionic liquid (PIL) hybrid materials with different anions were prepared and introduced into polypropylene/intumescent flame retardants (PP/IFR) system to modify its retardant efficiency. It is found that the of PILs play great roles in properties PP/IFR composites. The synergistic effect [BMIm]3PW (PIL1) on PP composites better than [BMIm]4SiW (PIL3), [BMIm]3PMo (PIL2) has best suitability composite 15 wt% total amount PIL2 IFR a LOI 28.0 passes UL-94 V-0 test...
Polymer dielectrics with high energy density and low dielectric loss are highly desired due to the rapid development of electric devices. Among known polymers, poly(vinylidene fluoride-ter-trifluoroethylene-ter-chlorofluoroethylene) P(VDF-TrFE-CFE) is one promising materials for storage capacitor applications because its constant. Nevertheless, it suffers from especially at field, which suppresses breakdown strength density. Herein, sandwiched structure films were fabricated by employing...
Three kinds of organic intercalation agent containing flame retardant groups, melamine (MA), triphenylphonium (TPP) chloride, and tetradecyl trihexyl phosphonium (TTP) bromide were intercalated into montmorillonite (MMT) via cation exchange reactions. These modified MMTs are combined with intumescent systems compounded PP. The thermal properties the PP composites studied. agents in layers MMT play important roles char formation composites. MA shows a better performance limiting oxygen index...