Ultrahigh discharge efficiency and energy density achieved at low electric fields in sandwich-structured polymer films containing dielectric elastomers

2019 ◽  
Vol 7 (8) ◽  
pp. 3729-3736 ◽  
Author(s):  
Jie Chen ◽  
Yifei Wang ◽  
Xinwei Xu ◽  
Qibin Yuan ◽  
Yujuan Niu ◽  
...  
Keyword(s):  
Energy Density ◽  
Electric Fields ◽  
Polymer Films ◽  
High Efficiency ◽  
Dielectric Elastomers ◽  
Low Field ◽  
Discharge Efficiency

A sandwich-structured film is capable of an ultra-high efficiency of 89% with an energy density of 11.8 J cm−3 at a low field of 300 MV m−1.

The ultrahigh discharge efficiency and energy density of P(VDF-HFP) via electrospinning-hot press with St-MMA copolymer

2021 ◽  
Author(s):  
Jian Wang ◽  
Yunchuan Xie ◽  
Yifei Zhang ◽  
Biyun Peng ◽  
Qizheng Li ◽  
...  
Keyword(s):  
Energy Density ◽  
Phase Field ◽  
Composite Films ◽  
Experimental Tests ◽  
Hot Press ◽  
Phase Field Simulation ◽  
Field Simulation ◽  
Discharge Efficiency

Flory–Huggins theory combined with experimental tests and phase-field simulation proves that electrospinning improves the homogeneity and Eb in composite films, and MS can limit the ferroelectric relaxation of PVDF and significantly increase Ue and η.

Excellent comprehensive energy storage capabilities achieved in linear polymer composites via inserting acrylic rubber dielectric elastomers

2021 ◽  
Author(s):  
Jie Chen ◽  
Yifei Wang ◽  
Weixing Chen
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Polymer Composites ◽  
Linear Polymer ◽  
Dielectric Elastomers ◽  
Organic Film ◽  
Available Energy ◽  
Multilayer Composites ◽  
Potential Applications

Multilayer composites have the potential applications in organic film capacitors due to their excellent dielectric and breakdown characteristic. However, poor efficiency (η) and limited available energy density (Ue) of the...

scholarly journals Vacancy tuned thermoelectric properties and high spin filtering performance in graphene/silicene heterostructures

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Zainab Gholami ◽  
Farhad Khoeini
Keyword(s):  
Electric Fields ◽  
High Spin ◽  
High Efficiency ◽  
Practical Applications ◽  
External Electric Fields ◽  
Ferromagnetic Exchange ◽  
High Spin Polarization ◽  
Filtering Effect ◽  
Spin Switching ◽  
Spin Filtering

AbstractThe main contribution of this paper is to study the spin caloritronic effects in defected graphene/silicene nanoribbon (GSNR) junctions. Each step-like GSNR is subjected to the ferromagnetic exchange and local external electric fields, and their responses are determined using the nonequilibrium Green’s function (NEGF) approach. To further study the thermoelectric (TE) properties of the GSNRs, three defect arrangements of divacancies (DVs) are also considered for a larger system, and their responses are re-evaluated. The results demonstrate that the defected GSNRs with the DVs can provide an almost perfect thermal spin filtering effect (SFE), and spin switching. A negative differential thermoelectric resistance (NDTR) effect and high spin polarization efficiency (SPE) larger than 99.99% are obtained. The system with the DV defects can show a large spin-dependent Seebeck coefficient, equal to Ss ⁓ 1.2 mV/K, which is relatively large and acceptable. Appropriate thermal and electronic properties of the GSNRs can also be obtained by tuning up the DV orientation in the device region. Accordingly, the step-like GSNRs can be employed to produce high efficiency spin caloritronic devices with various features in practical applications.

scholarly journals Research on Key Technology of Electrochemical Sterilization and Physical Application for Circulating Cooling Water

2021 ◽  
Vol 2083 (2) ◽  
pp. 022068
Author(s):  
Xiaohui Wang ◽  
Chunyan Song ◽  
Xueying Xie ◽  
Nan Zhang ◽  
Ruiqing Guo ◽  
...  
Keyword(s):  
Electric Fields ◽  
Electrode Materials ◽  
High Efficiency ◽  
Thermal Power ◽  
Cooling Water ◽  
Environmentally Friendly ◽  
Research Progress ◽  
Electrode Spacing ◽  
Experimental Conditions ◽  
Circulating Cooling Water

Abstract As a high-efficiency, low-cost, convenient and environmentally friendly sterilization technology, electrochemical disinfection has developed rapidly in recent years. Electrochemical sterilization is an environmentally friendly sterilization technology. The research progress of this technology in the recent 30 years in sterilization mechanism and electrode materials is summarized. The mechanism of electrochemical sterilization includes the chemical effects of active chlorine, active intermediates, copper or silver ions, and the physical effects of electric fields; the electrode materials used are titanium anode, carbon cathode, and anode. The article combined with electrochemical equipment in a thermal power plant cold open circulating cooling water treatment experiment. Experimental research found that under the conditions of current density of 120A/m2, residence time of 10s, and electrode spacing of 1.8cm, the bactericidal effect can reach 97%. Under certain experimental conditions and a certain period of time, the total number of heterogeneous bacteria in the circulating cooling water after treatment can be effectively inhibited.

Giant and reversible low field magnetocaloric effect in LiHoF4 compound

2021 ◽  
Author(s):  
Huicai Xie ◽  
Lu Tian ◽  
Qi Chen ◽  
Hao Sun ◽  
Xinqiang Gao ◽  
...  
Keyword(s):  
Magnetocaloric Effect ◽  
Industrial Production ◽  
High Efficiency ◽  
Human Life ◽  
Magnetic Refrigeration ◽  
Good Stability ◽  
Low Field ◽  
Application Potential

Cryogenic refrigeration technology is gradually penetrating into increasing aspects in human life and industrial production. Magnetic refrigeration shows excellent application potential due to its high efficiency, good stability and environmental...

Sign in / Sign up

Export Citation Format

Share Document