Characterization of Nanocomposites Incorporating PZT Nanowires for Enhanced Energy Storage

2010 ◽  
Author(s):  
Haixiong Tang ◽  
Yirong Lin ◽  
Clark Andrews ◽  
Henry A. Sodano
Keyword(s):  
Energy Storage ◽  
Dielectric Properties ◽  
Energy Density ◽  
Aspect Ratio ◽  
Electric Field ◽  
Polymer Composites ◽  
Volume Fraction ◽  
High Energy ◽  
High Energy Density ◽  
High Dielectric

0–3 Piezoceramic polymer composites have attracted immense attention due to the flexibility afforded by the polymer matrix and the strong electromechanical coupling and high dielectric properties of the piezoceramic filler. The majority of research on these materials has focused on the effective piezoelectric properties of the piezoceramic polymer composites. However, the high dielectric strength of the polymer combined with the high permittivity of the ceramic filler make them well suited for use as high energy density capacitors and various pulsed power applications. Current work in this area has focused on the enhancement of the dielectric properties through a variation of nanoparticle composition or surface modifications to the fillers to enhance the energy density of composites. Recently, research and micromechanics modeling have shown that the filler aspect ratio plays an important role in increasing the effective dielectric properties of the composites. Therefore, unlike prior efforts, this work will focus on the effect of filler aspect ratio on the dielectric properties of the bulk nanocomposite. Nanocomposites were synthesized using lead zirconate titanate (PZT) with two different aspect ratio (nanowires, nanorods) fillers at various volume fractions dispersed in a polyvinylidene fluoride (PVDF) matrix. It was shown that the nanocomposites containing PZT nanowires (NWs) significantly increased the energy density compared to those containing lower aspect ratio PZT nanorods (NRs). The permittivity constants of composites containing PZT NWs were higher than those with PZT NRs at the same inclusion volume fraction. The experimental results also indicated that the high frequency loss tangent of nanocomposites with PZT NWs was smaller than those of PZT NRs, demonstrating the high electrical energy storage efficiency of the PZT NW composite. The PZT NW nanocomposites showed a 77.8% increase in energy density over the PZT NR nanocomposites, under an electric field of 15 kV/mm and 50% volume fraction. Because the energy density exhibits a quadratic relationship with the applied electric field, the performance enhancement through the use of NWs is even greater at higher electric fields. These results indicate that higher aspect ratio PZT nanowires shows promising potential to improve the energy density of nanocomposites, leading the development of advanced capacitors with high energy density.

scholarly journals Improved dielectric constant and energy density of P(VDF-HFP) composites using NBT-xST (x=0, 0.10, 0.26) whiskers

2018 ◽  
Vol 08 (06) ◽  
pp. 1850040 ◽  
Author(s):  
Xuefan Zhou ◽  
Lu Wang ◽  
Guoliang Xue ◽  
Kechao Zhou ◽  
Hang Luo ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Dielectric Constant ◽  
Energy Storage ◽  
Energy Density ◽  
Electric Field ◽  
High Performance ◽  
Volume Fraction ◽  
High Energy ◽  
High Energy Density ◽  
Surface Modified

The high-performance energy-storage dielectric capacitors are increasingly important due to their wide applications in high power electronics. Here, we fabricated a novel P(VDF-HFP)-based capacitor with surface-modified NBT-[Formula: see text]ST ([Formula: see text], 0.10, 0.26) whiskers, denoted as Dop@NBT-[Formula: see text]ST/P(VDF-HFP). The influences of ST content, fillers’ volume fraction and electric field on the dielectric properties and energy-storage performance of the composites were investigated systematically. The results show that the dielectric constant monotonously increased with the increase of ST content and fillers’ volume fraction. The composite containing 10.0 vol% NBT-0.26ST whiskers possessed a dielectric constant of 39 at 1[Formula: see text]kHz, which was 5.6 times higher than that of pure P(VDF-HFP). It was noticed that the D-E loops of the composites became thinner and thinner with the increase of ST content. Due to the reduced remnant polarization, the composite with 5.0 vol% NBT-0.26ST whiskers achieved a high energy density of 6.18[Formula: see text]J/cm3 and energy efficiency of approximately 57% at a relatively low electric field of 200[Formula: see text]kV/mm. This work indicated that NBT-0.26ST whisker is a kind of potential ceramic filler in fabricating the dielectric capacitor with high discharged energy density and energy efficiency.

scholarly journals Significantly Enhanced Energy Storage Density by Modulating the Aspect Ratio of BaTiO3 Nanofibers

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Dou Zhang ◽  
Xuefan Zhou ◽  
James Roscow ◽  
Kechao Zhou ◽  
Lu Wang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Aspect Ratio ◽  
Volume Fraction ◽  
Breakdown Strength ◽  
Electric Displacement ◽  
High Energy ◽  
High Energy Density ◽  
Energy Storage Density ◽  
Storage Density

Abstract There is a growing need for high energy density capacitors in modern electric power supplies. The creation of nanocomposite systems based on one-dimensional nanofibers has shown great potential in achieving a high energy density since they can optimize the energy density by exploiting both the high permittivity of ceramic fillers and the high breakdown strength of the polymer matrix. In this paper, BaTiO3 nanofibers (NFs) with different aspect ratio were synthesized by a two-step hydrothermal method and the permittivity and energy storage of the P(VDF-HFP) nanocomposites were investigated. It is found that as the BaTiO3 NF aspect ratio and volume fraction increased the permittivity and maximum electric displacement of the nanocomposites increased, while the breakdown strength decreased. The nanocomposites with the highest aspect ratio BaTiO3 NFs exhibited the highest energy storage density at the same electric field. However, the nanocomposites with the lowest aspect ratio BaTiO3 NFs achieved the maximal energy storage density of 15.48 J/cm3 due to its higher breakdown strength. This contribution provides a potential route to prepare and tailor the properties of high energy density capacitor nanocomposites.

scholarly journals Development of Lead-Free Nanowire Composites for Energy Storage Applications

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Miguel Mendoza ◽  
Md Ashiqur Rahaman Khan ◽  
Mohammad Arif Ishtiaque Shuvo ◽  
Alberto Guerrero ◽  
Yirong Lin
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Polymer Matrix ◽  
Polyvinylidene Fluoride ◽  
Breakdown Strength ◽  
Environmental Safety ◽  
High Energy ◽  
High Energy Density ◽  
Lead Free ◽  
High Dielectric

There is an increasing demand to improve the energy density of dielectric capacitors for satisfying the next generation material systems. One effective approach is to embed high dielectric constant inclusions such as lead zirconia titanate in polymer matrix. However, with the increasing concerns on environmental safety and biocompatibility, the need to expel lead (Pb) from modern electronics has been receiving more attention. Using high aspect ratio dielectric inclusions such as nanowires could lead to further enhancement of energy density. Therefore, this paper focuses on the development of a lead-free nanowire reinforced polymer matrix capacitor for energy storage application. Lead-free sodium niobate nanowires (NaNbO3) were synthesized using hydrothermal method, followed by mixing them with polyvinylidene fluoride (PVDF) matrix using a solution-casting method for nanocomposites fabrication. Capacitance and breakdown strength of the samples were measured to determine the energy density. The energy density of NaNbO3/PVDF composites was also compared with that of lead-containing (PbTiO3/PVDF) nanocomposites and previously developed Pb()O3/PVDF composites to show the feasibility of replacing lead-containing materials. The energy density of NaNbO3/PVDF capacitor is comparable to those of lead-containing ones, indicating the possibility of expelling lead from high-energy density dielectric capacitors.

scholarly journals Tunable Nanodielectric Composites

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Daniel Qi Tan ◽  
Yang Cao ◽  
Xiaomei Fang ◽  
Patricia C. Irwin
Keyword(s):  
Energy Storage ◽  
Dielectric Properties ◽  
Energy Density ◽  
High Voltage ◽  
High Energy ◽  
High Energy Density ◽  
Energy Storage And Conversion ◽  
Interface Engineering ◽  
Tunable Device ◽  
High Level

This paper presents a progress update with the development of nanodielectric composites with electric field tunability for various high energy, high power electrical applications. It is demonstrated that nonlinear electrical/dielectric properties can be achieved via the nanostructure and interface engineering. A high level summary was given on the progress achieved as well as challenges remaining in nanodielectric engineering towards high energy density capacitors for energy storage and conversion, nonlinear dielectrics for tunable device, and high voltage varistor for surge suppression.

High energy density aqueous zinc–benzoquinone batteries enabled by carbon cloth with multiple anchoring effects

2021 ◽  
Author(s):  
Zhiqiang Luo ◽  
Silin Zheng ◽  
Shuo Zhao ◽  
Xin Jiao ◽  
Zongshuai Gong ◽  
...  
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Porous Carbon ◽  
Large Scale ◽  
High Energy ◽  
High Energy Density ◽  
Carbon Cloth ◽  
Anchoring Effects ◽  
High Theoretical Capacity ◽  
Energy Storage Applications

Benzoquinone with high theoretical capacity is anchored on N-plasma engraved porous carbon as a desirable cathode for rechargeable aqueous Zn-ion batteries. Such batteries display tremendous potential in large-scale energy storage applications.

scholarly journals Designing high energy density flow batteries by tuning active-material thermodynamics

RSC Advances ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 5432-5443
Author(s):  
Shyam K. Pahari ◽  
Tugba Ceren Gokoglan ◽  
Benjoe Rey B. Visayas ◽  
Jennifer Woehl ◽  
James A. Golen ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Energy Density ◽  
Fossil Fuels ◽  
Active Material ◽  
High Energy ◽  
Theoretical Framework ◽  
High Energy Density ◽  
Density Flow ◽  
The Cost

With the cost of renewable energy near parity with fossil fuels, energy storage is paramount. We report a breakthrough on a bioinspired NRFB active-material, with greatly improved solubility, and place it in a predictive theoretical framework.

scholarly journals Novel Lithium-Ion Capacitor Based on a NiO-rGO Composite

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3586
Author(s):  
Qi An ◽  
Xingru Zhao ◽  
Shuangfu Suo ◽  
Yuzhu Bai
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Power Density ◽  
High Power ◽  
Specific Capacity ◽  
Lithium Ion ◽  
High Energy ◽  
Cycle Life ◽  
High Energy Density ◽  
Lithium Ion Capacitor

Lithium-ion capacitors (LICs) have been widely explored for energy storage. Nevertheless, achieving good energy density, satisfactory power density, and stable cycle life is still challenging. For this study, we fabricated a novel LIC with a NiO-rGO composite as a negative material and commercial activated carbon (AC) as a positive material for energy storage. The NiO-rGO//AC system utilizes NiO nanoparticles uniformly distributed in rGO to achieve a high specific capacity (with a current density of 0.5 A g−1 and a charge capacity of 945.8 mA h g−1) and uses AC to provide a large specific surface area and adjustable pore structure, thereby achieving excellent electrochemical performance. In detail, the NiO-rGO//AC system (with a mass ratio of 1:3) can achieve a high energy density (98.15 W h kg−1), a high power density (10.94 kW kg−1), and a long cycle life (with 72.1% capacity retention after 10,000 cycles). This study outlines a new option for the manufacture of LIC devices that feature both high energy and high power densities.

scholarly journals Development on Thermochemical Energy Storage Based on CaO-Based Materials: A Review

2018 ◽  
Vol 10 (8) ◽  
pp. 2660 ◽  
Author(s):  
Yi Yuan ◽  
Yingjie Li ◽  
Jianli Zhao
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Energy Density ◽  
Circulating Fluidized Bed ◽  
High Energy ◽  
High Energy Density ◽  
Hydration Reaction ◽  
Initial Sample ◽  
Storage Performance ◽  
Low Activity

The intermittent and inconsistent nature of some renewable energy, such as solar and wind, means the corresponding plants are unable to operate continuously. Thermochemical energy storage (TES) is an essential way to solve this problem. Due to the advantages of cheap price, high energy density, and ease to scaling, CaO-based material is thought as one of the most promising storage mediums for TES. In this paper, TES based on various cycles, such as CaO/CaCO3 cycles, CaO/Ca(OH)2 cycles, and coupling of CaO/Ca(OH)2 and CaO/CaCO3 cycles, were reviewed. The energy storage performances of CaO-based materials, as well as the modification approaches to improve their performance, were critically reviewed. The natural CaO-based materials for CaO/Ca(OH)2 TES experienced the multiple hydration/dehydration cycles tend to suffer from severe sintering which leads to the low activity and structural stability. It is found that higher dehydration temperature, lower initial sample temperature of the hydration reaction, higher vapor pressure in the hydration reactor, and the use of circulating fluidized bed (CFB) reactors all can improve the energy storage performance of CaO-based materials. In addition, the energy storage performance of CaO-based materials for CaO/Ca(OH)2 TES can be effectively improved by the various modification methods. The additions of Al2O3, Na2Si3O7, and nanoparticles of nano-SiO2 can improve the structural stabilities of CaO-based materials, while the addition of LiOH can improve the reactivities of CaO-based materials. This paper is devoted to a critical review on the development on thermochemical energy storage based on CaO-based materials in the recent years.

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