Conductive and anti-freezing hydrogels constructed by pseudo-slide-ring networks

AbstractRecently, tensor ring networks (TRNs) have been applied in deep networks, achieving remarkable successes in compression ratio and accuracy. Although highly related to the performance of TRNs, rank selection is seldom studied in previous works and usually set to equal in experiments. Meanwhile, there is not any heuristic method to choose the rank, and an enumerating way to find appropriate rank is extremely time-consuming. Interestingly, we discover that part of the rank elements is sensitive and usually aggregate in a narrow region, namely an interest region. Therefore, based on the above phenomenon, we propose a novel progressive genetic algorithm named progressively searching tensor ring network search (PSTRN), which has the ability to find optimal rank precisely and efficiently. Through the evolutionary phase and progressive phase, PSTRN can converge to the interest region quickly and harvest good performance. Experimental results show that PSTRN can significantly reduce the complexity of seeking rank, compared with the enumerating method. Furthermore, our method is validated on public benchmarks like MNIST, CIFAR10/100, UCF11 and HMDB51, achieving the state-of-the-art performance.

Download Full-text

Hardware Support to Minimize the End-to-End Delay in Ethernet-Based Ring Networks

Electronics ◽

10.3390/electronics8101097 ◽

2019 ◽

Vol 8 (10) ◽

pp. 1097

Author(s):

Tomás P. Corrêa ◽

Luis Almeida

Keyword(s):

Media Access Control ◽

Hardware Accelerators ◽

Ring Networks ◽

Ring Network ◽

Media Access ◽

Factory Automation ◽

Cycle Times ◽

End To End Delay ◽

Packet Length ◽

Networking Technology

Ethernet is a popular networking technology in factory automation and industrial embedded systems, frequently using a ring topology for improved fault-tolerance. As many applications demand ever shorter cycle times and a higher number of nodes, the popular ring endure to remain as a valid topology. In this work, we discuss the factors that determine the ring network delay and show how they affect the network cycle time. Since increasing the link capacity has limited reach, we explore a time-triggered protocol that brings the nodes forwarding delay near to the physical layer delay. Additionally, we propose hardware accelerators based on FPGA technology that minimise the packet reception delay from physical reception to delivery to an application handler, preserving Ethernet layers and being compatible with its standard. This paper explains the accelerators concept and implementation, presents measurements using standard Media Access Control implementations, and shows the solution effectiveness with experimental results. We achieved a delay, from physical reception to the triggering of a user-level handler, of 1.1 µs independent of the packet length.

Download Full-text

Dry-regulated hydrogels with anisotropic mechanical performance and ionic conductivity

Chinese Chemical Letters ◽

10.1016/j.cclet.2021.08.010 ◽

2021 ◽

Author(s):

Ping Li ◽

Yi Liu ◽

Ziang Wang ◽

Xuemei Xiao ◽

Guozhe Meng ◽

...

Keyword(s):

Ionic Conductivity ◽

Mechanical Performance

Download Full-text

Electroactive γ-Phase, Enhanced Thermal and Mechanical Properties and High Ionic Conductivity Response of Poly (Vinylidene Fluoride)/Cellulose Nanocrystal Hybrid Nanocomposites

Materials ◽

10.3390/ma13030743 ◽

2020 ◽

Vol 13 (3) ◽

pp. 743

Author(s):

Erlantz Lizundia ◽

Ander Reizabal ◽

Carlos M. Costa ◽

Alberto Maceiras ◽

Senentxu Lanceros-Méndez

Keyword(s):

Ionic Conductivity ◽

Vinylidene Fluoride ◽

Mechanical Performance ◽

Dielectric Behavior ◽

Hybrid Nanocomposites ◽

Thermal And Mechanical Properties ◽

Oh Groups ◽

Poly Vinylidene Fluoride ◽

Relevant Role

Cellulose nanocrystals (CNCs) were incorporated into poly (vinylidene fluoride) (PVDF) to tailor the mechanical and dielectric properties of this electroactive polymer. PVDF/CNC nanocomposites with concentrations up to 15 wt.% were prepared by solvent-casting followed by quick vacuum drying in order to ensure the formation of the electroactive γ-phase. The changes induced by the presence of CNCs on the morphology of PVDF and its crystalline structure, thermal properties, mechanical performance and dielectric behavior are explored. The results suggest a relevant role of the CNC surface −OH groups, which interact with PVDF fluorine atoms. The real dielectric constant ε’ of nanocomposites at 200 Hz was found to increase by 3.6 times up to 47 for the 15 wt.% CNC nanocomposite due to an enhanced ionic conductivity provided by CNCs. The approach reported here in order to boost the formation of the γ-phase of PVDF upon the incorporation of CNCs serves to further develop cellulose-based multifunctional materials.

Download Full-text

Highly oriented β″-alumina ceramics with excellent ionic conductivity and mechanical performance obtained by spark plasma sintering technique

Journal of Materials Science ◽

10.1007/s10853-020-04423-x ◽

2020 ◽

Vol 55 (20) ◽

pp. 8435-8443 ◽

Cited By ~ 1

Author(s):

Kaiyun Li ◽

Yang Yang ◽

Xiao Zhang ◽

Sen Liang

Keyword(s):

Ionic Conductivity ◽

Spark Plasma Sintering ◽

Mechanical Performance ◽

Alumina Ceramics ◽

Plasma Sintering ◽

Spark Plasma

Download Full-text

High electrochemical and mechanical performance of zinc conducting-based gel polymer electrolytes

Scientific Reports ◽

10.1038/s41598-021-92671-5 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Isala Dueramae ◽

Manunya Okhawilai ◽

Pornnapa Kasemsiri ◽

Hiroshi Uyama

Keyword(s):

Mechanical Properties ◽

Ionic Conductivity ◽

Polymer Electrolytes ◽

Zinc Acetate ◽

Mechanical Performance ◽

Mechanical Stability ◽

Morphological Properties ◽

Zinc Salt ◽

Gel Polymer Electrolytes ◽

Minimum Requirement

AbstractZinc ionic conducting-based gel polymer electrolytes (GPEs) were fabricated from carboxymethyl cellulose (CMC) and three different zinc salts in a mass ratio ranging within 0–30 wt%. The effects of zinc salt and loading level on the structure, thermal, mechanical, mechanical stability, and morphological properties, as well as electrochemical properties of the GPEs films, were symmetrically investigated. The mechanical properties and mechanical stability of CMC were improved with the addition of zinc acetate, zinc sulphate, and zinc triflate, approaching the minimum requirement of a solid state membrane for battery. The maximum ionic conductivity of 2.10 mS cm−1 was achieved with the addition of 15 wt% zinc acetate (ZnA), GPEA15. The supported parameters, indicating the presence of the amorphous region that likely supported Zn2+ movement in the CMC chains, were clearly revealed with the increase in the number of mobile Zn2+ carriers in FT-IR spectra and the magnitude of ionic transference number, the decrease of the enthalpy of fusion in DSC thermogram, and the shifting to lower intensity of 2θ in XRD pattern. The developed CMC/ZnA complex-based GPEs are very promising for their high ionic conductivity as well as good mechanical properties and the ability for long-term utilization in a zinc ion battery.

Download Full-text

The ionic conductivity, mechanical performance and morphology of two-phase structural electrolytes based on polyethylene glycol, epoxy resin and nano-silica

Materials Science and Engineering B ◽

10.1016/j.mseb.2017.03.001 ◽

2017 ◽

Vol 219 ◽

pp. 37-44 ◽

Cited By ~ 6

Author(s):

Qihang Feng ◽

Jiping Yang ◽

Yalin Yu ◽

Fangyu Tian ◽

Boming Zhang ◽

...

Keyword(s):

Polyethylene Glycol ◽

Ionic Conductivity ◽

Epoxy Resin ◽

Mechanical Performance ◽

Nano Silica ◽

Two Phase

Download Full-text

Promotion of Ionic Conductivity of PEO-Based Solid Electrolyte Using Ultrasonic Vibration

Polymers ◽

10.3390/polym12091889 ◽

2020 ◽

Vol 12 (9) ◽

pp. 1889 ◽

Cited By ~ 1

Author(s):

Hui Wang ◽

Xiaodong Cui ◽

Cong Zhang ◽

Huang Gao ◽

Wei Du ◽

...

Keyword(s):

Solid State ◽

Ionic Conductivity ◽

Solid Electrolyte ◽

Ultrasonic Vibration ◽

Ultrasonic Treatment ◽

Mechanical Performance ◽

Lithium Ion ◽

High Energy ◽

Frictional Heat ◽

Power Ultrasound

All solid-state lithium-ion batteries based on polymer electrolytes have higher safety and energy density, but the low conductivity of lithium ion restricts its application. This study proposes a new method to promote the ionic conductivity of polyethylene oxide (PEO)-based solid electrolytes. In this method, the PEO-based solid electrolyte was first prepared by casting, and then power ultrasound was exerted on the electrolyte by a sandwich structure to modify the electrolyte structure. Through analysis of the performance and microstructure of the electrolyte, it was found that the ultrasonic treatment increased the ionic conductivity by 78%, improved tensile strength and plastic deformation ability, but did not affect the thermal stability and the chemical composition. The ultrasonic vibration, exerting high energy to the solid electrolyte through high-frequency vibration, broke PEO grains and melted them with the frictional heat at boundary. Due to the slight melting and fast solidifying produced by the pulsed ultrasonic treatment, the crystallization was suppressed. The crystallinity was thus reduced by 6.2%, which increased the migration channels of lithium ions and reduced the tortuosity effect. Furthermore, the ultrasonic vibration compressed the electrolyte to produce plastic flow of the material, which made the electrolyte structure more compact. The density of ethylene oxide (EO) units thus increased in the amorphous phase, providing multiple electron-donor coordination sites for the Li+. The hopping distance of the ion between donors decreased, which also facilitated the migration. In addition, the mechanical performance of the electrolyte membrane improved. This study provides a reference for the improvement of polymer based all-solid-state batteries.

Download Full-text