Design strategy of barium titanate/polyvinylidene fluoride-based nanocomposite films for high energy storage

2020 ◽  
Vol 8 (3) ◽  
pp. 884-917 ◽  
Author(s):  
Yan Wang ◽  
Minggang Yao ◽  
Rong Ma ◽  
Qibin Yuan ◽  
Desuo Yang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Energy Storage ◽  
Barium Titanate ◽  
Nanocomposite Film ◽  
Polyvinylidene Fluoride ◽  
Design Strategy ◽  
High Energy ◽  
Nanocomposite Films ◽  
Electronic Components ◽  
High Energy Storage

Barium titanate/polyvinylidene fluoride- (BT/PVDF-) based nanocomposite film exhibits excellent energy storage and mechanical properties and can be used as flexible electronic components.

scholarly journals An investigation on the effect of high energy storage anchor on surrounding rock conditions

2020 ◽  
Vol 7 (10) ◽  
pp. 201105
Author(s):  
Bowen Wu ◽  
Xiangyu Wang ◽  
Jianbiao Bai ◽  
Wenda Wu ◽  
Ningkang Meng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Energy Storage ◽  
Elastic Strain ◽  
Strain Energy ◽  
Hard Rock ◽  
Elastic Strain Energy ◽  
High Energy ◽  
Energy Evolution ◽  
Rock Bolts ◽  
High Energy Storage

High pre-tension bolt is an effective strata control technique and is the key to ensure the stability of anchorage and roadway. Based on the performances of high energy storage tension rock bolts in different rock properties, this study proposed a constitutive model to describe the energy balance of anchor under uniaxial compression. UDEC was used to simulate the behaviour of anchor in coal under uniaxial compression and the results were analysed to study the rock mechanical properties, degree of damage and energy evolution. Simulation results showed that tension rock bolts can improve the mechanical properties and energy storage capacities of the anchor. The energy evolution was divided into three stages: (i) the external work was stored in the form of elastic strain energy ( U e ) in the anchor prior to the yielding strength; (ii) the elastic strain energy reached its maximum near the peak strength; (iii) energy was dissipated from fracture friction ( W f) , plastic deformation ( W p ) and acoustic emission ( U r ) during post-peak stage. The installation of tension rock bolts was more suitable for medium hard rock (e.g. sandy mudstone), whereas it was not effective for hard rock (e.g. sandstone).

High energy storage capacitance of defluorinated polyvinylidene fluoride and polyvinylidene fluoride blend alloy for capacitor applications

2020 ◽  
Vol 137 (36) ◽  
pp. 49055
Author(s):  
Hongwei Lu ◽  
Jianxin Du ◽  
Huilong Zhang ◽  
Xiaojie Guo ◽  
Jiayou Du ◽  
...  
Keyword(s):  
Energy Storage ◽  
Polyvinylidene Fluoride ◽  
High Energy ◽  
High Energy Storage

scholarly journals Advancing Dielectric and Ferroelectric Properties of Piezoelectric Polymers by Combining Graphene and Ferroelectric Ceramic Additives for Energy Storage Applications

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1553 ◽  
Author(s):  
Saira Ishaq ◽  
Farah Kanwal ◽  
Shahid Atiq ◽  
Mahmoud Moussa ◽  
Umar Azhar ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Energy Storage ◽  
Barium Titanate ◽  
Polyvinylidene Fluoride ◽  
Ferroelectric Properties ◽  
Weight Ratio ◽  
Ferroelectric Ceramic ◽  
Nanocomposite Films ◽  
Piezoelectric Polymers ◽  
Energy Storage Applications

To address the limitations of piezoelectric polymers which have a low dielectric constant andto improve their dielectric and ferroelectric efficiency for energy storage applications, we designed and characterized a new hybrid composite that contains polyvinylidene fluoride as a dielectric polymer matrix combined with graphene platelets as a conductive and barium titanite as ceramic ferroelectric fillers. Different graphene/barium titanate/polyvinylidene fluoride nanocomposite films were synthesized by changing the concentration of graphene and barium titanate to explore the impact of each component and their potential synergetic effect on dielectric and ferroelectric properties of the composite. Results showed that with an increase in the barium titanate fraction, dielectric efficiency ofthe nanocomposite was improved. Among all synthesized nanocomposite films, graphene/barium titanate/polyvinylidene fluoride nanocomposite in the weight ratio of 0.15:0.5:1 exhibited thehighest dielectric constant of 199 at 40 Hz, i.e., 15 fold greater than that of neat polyvinylidene fluoride film at the same frequency, and possessed a low loss tangent of 0.6. However, AC conductivity and ferroelectric properties of graphene/barium titanate/polyvinylidene fluoride nanocomposite films were enhanced with an increase in the graphene weight fraction. Graphene/barium titanate/polyvinylidene fluoride nanocomposite films with a weight ratio of 0.2:0.1:1 possessed a high AC conductivity of 1.2 × 10−4 S/m at 40 Hz. While remanent polarization, coercive field, and loop area of the same sample were 0.9 μC/cm2, 9.78 kV/cm, and 24.5 μC/cm2·V, respectively. Our results showed that a combination of graphene and ferroelectric ceramic additives are an excellent approach to significantly advance the performance of dielectric and ferroelectric properties of piezoelectric polymers for broad applications including energy storage.

scholarly journals Surface‐modified barium titanate by MEEAA for high‐energy storage application of polymer composites

High Voltage ◽  
2016 ◽  
Vol 1 (4) ◽  
pp. 175-180 ◽  
Author(s):  
Yanbin Shen ◽  
Suibin Luo ◽  
Shuhui Yu ◽  
Rong Sun ◽  
Ching‐Ping Wong
Keyword(s):  
Energy Storage ◽  
Barium Titanate ◽  
Polymer Composites ◽  
High Energy ◽  
Energy Storage Application ◽  
Surface Modified ◽  
High Energy Storage

scholarly journals Energy Storage and Electrocaloric Cooling Performance of Advanced Dielectrics

Molecules ◽  
2021 ◽  
Vol 26 (2) ◽  
pp. 481
Author(s):  
Yalong Zhang ◽  
Jie Chen ◽  
Huiyu Dan ◽  
Mudassar Maraj ◽  
Biaolin Peng ◽  
...  
Keyword(s):  
Energy Storage ◽  
Dielectric Materials ◽  
High Energy ◽  
Ferroelectric Materials ◽  
Performance Characteristics ◽  
Energy Storage Density ◽  
Electronic Components ◽  
Storage Density ◽  
High Energy Storage Density ◽  
High Energy Storage

Dielectric capacitors are widely used in pulse power systems, electric vehicles, aerospace, and defense technology as they are crucial for electronic components. Compact, lightweight, and diversified designs of electronic components are prerequisites for dielectric capacitors. Additionally, wide temperature stability and high energy storage density are equally important for dielectric materials. Ferroelectric materials, as special (spontaneously polarized) dielectric materials, show great potential in the field of pulse power capacitors having high dielectric breakdown strength, high polarization, low-temperature dependence and high energy storage density. The first part of this review briefly introduces dielectric materials and their energy storage performance. The second part elaborates performance characteristics of various ferroelectric materials in energy storage and refrigeration based on electrocaloric effect and briefly shed light on advantages and disadvantages of various common ferroelectric materials. Especially, we summarize the polarization effects of underlying substrates (such as GaN and Si) on the performance characteristics of ferroelectric materials. Finally, the review will be concluded with an outlook, discussing current challenges in the field of dielectric materials and prospective opportunities to assess their future progress.

scholarly journals High energy storage MnO2@C fabricated by ultrasonic-assisted stepwise electrodeposition and vapor carbon coating

2021 ◽  
Vol 6 ◽  
pp. 100098
Author(s):  
Ming Zhang ◽  
Dandan Jin ◽  
Liu Zhang ◽  
Xumei Cui ◽  
Zhi Zhang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Carbon Coating ◽  
High Energy ◽  
Ultrasonic Assisted ◽  
High Energy Storage

Sandwich structured lead-free ceramics based on Bi0.5Na0.5TiO3 for high energy storage

2021 ◽  
pp. 130669
Author(s):  
Fei Yan ◽  
Hairui Bai ◽  
Yunjing Shi ◽  
Guanglong Ge ◽  
Xiaofeng Zhou ◽  
...  
Keyword(s):  
Energy Storage ◽  
High Energy ◽  
Lead Free ◽  
Lead Free Ceramics ◽  
High Energy Storage
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