scholarly journals Temperature-dependent energy storage characterization of Pb-free relaxor ferroelectrics

2020 ◽  
Vol 10 (03) ◽  
pp. 2050009
Author(s):  
Sarir Uddin ◽  
Guang-Ping Zheng ◽  
Asif Khan ◽  
Muhammad Riaz Khan ◽  
Banaras Khan
Keyword(s):  
Energy Storage ◽  
Electric Field ◽  
Sol Gel ◽  
Relaxor Ferroelectrics ◽  
Maximum Energy ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Increase With Increase ◽  
Energy Storage Properties ◽  
Increasing Temperature

The energy storage properties of [Formula: see text][Formula: see text][Formula: see text]TiO3–[Formula: see text]BaTiO3([Formula: see text]) (BNT–BT) ceramics obtained via sol–gel method are determined from the polarization versus electric field ([Formula: see text]–[Formula: see text]) loops at various temperatures. The energy storage densities are observed to increase with increase in temperature and this may be attributed to the presence of antiferroelectric (AFE) phase at higher temperature ([Formula: see text]C). Obvious changes are observed in the saturation polarization ([Formula: see text] and remnant polarization ([Formula: see text] with increasing temperature. The maximum energy storage density of 0.6[Formula: see text]J/cm3 is observed for [Formula: see text] in the AFE phase at 150∘C for 90[Formula: see text]kV/cm of applied electric field. BNT–BT can be a promising candidate for energy storage devices to be used in above-room-temperature environment.

scholarly journals BiFeO3-BaTiO3: A new generation of lead-free electroceramics

2018 ◽  
Vol 08 (06) ◽  
pp. 1830004 ◽  
Author(s):  
Dawei Wang ◽  
Ge Wang ◽  
Shunsuke Murakami ◽  
Zhongming Fan ◽  
Antonio Feteira ◽  
...  
Keyword(s):  
Energy Storage ◽  
Limited Range ◽  
Lead Free ◽  
Potassium Sodium Niobate ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Wide Range ◽  
Energy Storage Properties ◽  
New Generation ◽  
Initial Results

Lead-based electroceramics such as Pb(Zr.Ti)O3 (PZT) and its derivatives have excellent piezoelectric, pyroelectric and energy storage properties and can be used in a wide range of applications. Potential lead-free replacements for PZT such as potassium sodium niobate (KNN) and sodium bismuth titanate (NBT) have a much more limited range of useful properties and have been optimized primarily for piezoelectric applications. Here, we review the initial results on a new generation of lead-free electroceramics based on BiFeO3-BaTiO3 (BF-BT) highlighting the essential crystal chemistry that permits a wide range of functional properties. We demonstrate that with the appropriate dopants and heat treatment, BF-BT can be used to fabricate commercially viable ceramics for applications, ranging from sensors, multilayer actuators, capacitors and high-density energy storage devices. We also assess the potential of BF-BT-based ceramics for electrocaloric and pyroelectric applications.

scholarly journals Silicon Oxycarbide-Graphite Electrodes for High-Power Energy Storage Devices

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4302
Author(s):  
Dominik Knozowski ◽  
Magdalena Graczyk-Zajac ◽  
Grzegorz Trykowski ◽  
Monika Wilamowska-Zawłocka
Keyword(s):  
Energy Storage ◽  
High Power ◽  
Sol Gel ◽  
Lithium Ion ◽  
Silicon Oxycarbide ◽  
Energy Storage Devices ◽  
Graphite Composite ◽  
Storage Devices ◽  
Lithium Ion Capacitor ◽  
Graphite Composites

Herein we present a study on polymer-derived silicon oxycarbide (SiOC)/graphite composites for a potential application as an electrode in high power energy storage devices, such as Lithium-Ion Capacitor (LIC). The composites were processed using high power ultrasound-assisted sol-gel synthesis followed by pyrolysis. The intensive sonication enhances gelation and drying process, improving the homogenous distribution of the graphitic flakes in the preceramic blends. The physicochemical investigation of SiOC/graphite composites using X-ray diffraction, 29Si solid state NMR and Raman spectroscopy indicated no reaction occurring between the components. The electrochemical measurements revealed enhanced capacity (by up to 63%) at high current rates (1.86 A g−1) recorded for SiOC/graphite composite compared to the pure components. Moreover, the addition of graphite to the SiOC matrix decreased the value of delithiation potential, which is a desirable feature for anodes in LIC.

scholarly journals Triaxial Carbon Nanotube/Conducting Polymer Wet-Spun Fibers Supercapacitors for Wearable Electronics

Nanomaterials ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 3
Author(s):  
Azadeh Mirabedini ◽  
Zan Lu ◽  
Saber Mostafavian ◽  
Javad Foroughi
Keyword(s):  
Carbon Nanotube ◽  
Energy Storage ◽  
Low Cost ◽  
Future Generation ◽  
Maximum Energy ◽  
Wearable Electronics ◽  
Electronic Textiles ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Increasing Demand

The ubiquity of wearables, coupled with the increasing demand for power, presents a unique opportunity for nanostructured fiber-based mobile energy storage systems. When designing wearable electronic textiles, there is a need for mechanically flexible, low-cost and light-weight components. To meet this demand, we have developed an all-in-one fiber supercapacitor with a total thickness of less than 100 μm using a novel facile coaxial wet-spinning approach followed by a fiber wrapping step. The formed triaxial fiber nanostructure consisted of an inner poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) core coated with an ionically conducting chitosan sheath, subsequently wrapped with a carbon nanotube (CNT) fiber. The resulting supercapacitor is highly flexible, delivers a maximum energy density 5.83 Wh kg−1 and an extremely high power of 1399 W kg−1 along with remarkable cyclic stability and specific capacitance. This asymmetric all-in-one fiber supercapacitor may pave the way to a future generation of wearable energy storage devices.

scholarly journals Switching and energy-storage characteristics in PLZT 2/95/5 antiferroelectric ceramic system

2016 ◽  
Vol 06 (04) ◽  
pp. 1620003 ◽  
Author(s):  
A. Peláiz-Barranco ◽  
Y. Mendez-González ◽  
J. D. S. Guerra ◽  
Xiucai Wang ◽  
Tongqing Yang
Keyword(s):  
Energy Storage ◽  
Hysteresis Loops ◽  
Energy Storage Density ◽  
Ceramic System ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Electric Field Dependence ◽  
Energy Storage Properties ◽  
Storage Characteristics ◽  
Storage Properties

Switching mechanisms and energy-storage properties have been investigated in (Pb[Formula: see text]La[Formula: see text](Zr[Formula: see text]Ti[Formula: see text]O3 antiferroelectric ceramics. The electric field dependence of polarization ([Formula: see text]–[Formula: see text] hysteresis loops) indicates that both the ferroelectric (FE) and antiferroelectric (AFE) phases coexist, being the AFE more stable above 100[Formula: see text]C. It has been observed that the temperature has an important influence on the switching parameters. On the other hand, the energy-storage density, which has been calculated from the [Formula: see text]–[Formula: see text] hysteresis loops, shows values higher than 1[Formula: see text]J/cm3 for temperatures above 100[Formula: see text]C with around 73% of efficiency as average. These properties indicate that the studied ceramic system reveals as a promising AFE material for energy-storage devices application.

scholarly journals BiFeO3-Based Relaxor Ferroelectrics for Energy Storage: Progress and Prospects

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7188
Author(s):  
Bipul Deka ◽  
Kyung-Hoon Cho
Keyword(s):  
Energy Storage ◽  
Breakdown Strength ◽  
Storage Systems ◽  
Electrical Energy ◽  
Relaxor Ferroelectrics ◽  
Energy Storage Systems ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Storage Performance ◽  
Low Dielectric

Dielectric capacitors have been widely studied because their electrostatic storage capacity is enormous, and they can deliver the stored energy in a very short time. Relaxor ferroelectrics-based dielectric capacitors have gained tremendous importance for the efficient storage of electrical energy. Relaxor ferroelectrics possess low dielectric loss, low remanent polarization, high saturation polarization, and high breakdown strength, which are the main parameters for energy storage. This article focuses on a timely review of the energy storage performance of BiFeO3-based relaxor ferroelectrics in bulk ceramics, multilayers, and thin film forms. The article begins with a general introduction to various energy storage systems and the need for dielectric capacitors as energy storage devices. This is followed by a brief discussion on the mechanism of energy storage in capacitors, ferroelectrics, anti-ferroelectrics, and relaxor ferroelectrics as potential candidates for energy storage. The remainder of this article is devoted to reviewing the energy storage performance of bulk ceramics, multilayers, and thin films of BiFeO3-based relaxor ferroelectrics, along with a discussion of strategies to address some of the issues associated with their application as energy storage systems.

scholarly journals Asymmetric Fiber Supercapacitors Based on a FeC2O4/FeOOH-CNT Hybrid Material

2021 ◽  
Vol 7 (3) ◽  
pp. 62
Author(s):  
Paa Kwasi Adusei ◽  
Kevin Johnson ◽  
Sathya N. Kanakaraj ◽  
Guangqi Zhang ◽  
Yanbo Fang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Iron Hydroxide ◽  
Storage Device ◽  
Wearable Electronics ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Energy Storage Properties ◽  
Bend Tests ◽  
Unique Composition ◽  
Power Densities

The development of new flexible and lightweight electronics has increased the demand for compatible energy storage devices to power them. Carbon nanotube (CNT) fibers have long been known for their ability to be assembled into yarns, offering their integration into electronic devices. They are hindered, however, by their low intrinsic energy storage properties. Herein, we report a novel composite yarn, synthesized through solvothermal processes, that attained energy densities in the range between 0.17 µWh/cm2 and 3.06 µWh/cm2, and power densities between 0.26 mW/cm2 and 0.97 mW/cm2, when assembled in a supercapacitor with a PVDF-EMIMBF4 electrolyte. The created unique composition of iron oxalate + iron hydroxide + CNT as an anode worked well in synergy with the much-studied PANI + CNT cathode, resulting in a highly stable yarn energy storage device that maintained 96.76% of its energy density after 4000 cycles. This device showed no observable change in performance under stress/bend tests which makes it a viable candidate for powering wearable electronics.

scholarly journals Structural, Magnetic, Dielectric and Energy Storage Analysis of CoFe2O4@BaTiO3 and BaTiO3@CoFe2O4 Core-Shell Nano- Composites

2020 ◽  
Author(s):  
NIDHI SHEORAN ◽  
Vinod Kumar ◽  
Ashok Kumar
Keyword(s):  
Energy Storage ◽  
Spinel Ferrite ◽  
Sol Gel ◽  
Maximum Energy ◽  
Tangent Loss ◽  
Core Shell ◽  
Loop Analysis ◽  
Energy Storage Properties ◽  
Energy Storage Efficiency ◽  
Co Precipitation

Abstract Nano size spinel ferrite CoFe2O4 (CFO), ferroelectric BaTiO3 (BTO) and their core-shell nanocomposites BTO@CFO and CFO@BTO were synthesized using combination of chemical co-precipitation and sol-gel route respectively. The phase formation and crystallinity of bare CFO, BTO and their core-shell nanocomposites were verifiedviaX-ray diffraction pattern (XRD). High resolution transmission electron microscopy(HRTEM) revealed the core-shell structure of the nanocomposites.Magnetization measurements exhibitferromagnetic behaviour of all the samples except BTO in which superposition of weak ferromagnetic and diamagnetic response occurred due to its nanostructure. Magnetization versus temperature (M-T plot) measurements show anomaly near ferroelectric to paraelectric phase transition of BTO. Also,dielectric constant(ε¢) and tangent loss (tanδ) variation with respect to frequency (102 to 106 Hz) and temperature (300-700 K) were presented. ε¢-T curve of nanocomposites exhibit anomaly at the same temperature as observed in M-T plot of nanocomposites that indicate the inherent magneto-electric coupling in nanocomposites. Energy storage properties of BTO and nanocomposites have been examined via P-E loop analysis and confirmed that the sample CFO@BTO exhibit maximum energy storage efficiency.

An aqueous hybrid electrolyte for low-temperature zinc-based energy storage devices

2020 ◽  
Vol 13 (10) ◽  
pp. 3527-3535 ◽  
Author(s):  
Nana Chang ◽  
Tianyu Li ◽  
Rui Li ◽  
Shengnan Wang ◽  
Yanbin Yin ◽  
...  
Keyword(s):  
Energy Storage ◽  
Low Temperature ◽  
Energy Storage Devices ◽  
Storage Devices

A frigostable aqueous hybrid electrolyte enabled by the solvation interaction of Zn2+–EG is proposed for low-temperature zinc-based energy storage devices.

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