A5100766543- Advancements in Battery Materials
- Advanced Battery Materials and Technologies
- Advanced Battery Technologies Research
- Supercapacitor Materials and Fabrication
- Metamaterials and Metasurfaces Applications
- Microwave Engineering and Waveguides
- Advanced Antenna and Metasurface Technologies
- Extraction and Separation Processes
- Antenna Design and Analysis
- Magnetic Properties and Synthesis of Ferrites
- Nanowire Synthesis and Applications
- Anodic Oxide Films and Nanostructures
- Lightning and Electromagnetic Phenomena
- Nanoparticles: synthesis and applications
- Electromagnetic Compatibility and Noise Suppression
- Advanced battery technologies research
- Gas Sensing Nanomaterials and Sensors
- Nanomaterials for catalytic reactions
- Chemical Synthesis and Characterization
- Catalysis and Oxidation Reactions
- GaN-based semiconductor devices and materials
- Thermal Expansion and Ionic Conductivity
- Optimal Power Flow Distribution
- ZnO doping and properties
- Real-time simulation and control systems
Vietnam National University Ho Chi Minh City
2016-2024
Ho Chi Minh City University of Science
2016-2024
Le Quy Don Technical University
2018-2024
The University of Texas MD Anderson Cancer Center
2015-2024
Northwestern Medicine
2024
Vietnam Academy of Science and Technology
2023
Hanoi Medical University
2022
National Institute of Advanced Industrial Science and Technology
2021
Nagoya University
2014-2020
Japan Science and Technology Agency
2014-2017
Abstract Sodium‐ion batteries have been considered one of the most promising power sources beyond Li‐ion batteries. Although Na metal anode exhibits a high theoretical capacity 1165 mAh g −1 , its application in is largely hindered by dendrite growth and low coulombic efficiency. Herein, it demonstrated that an electrolyte consisting 1 m sodium tetrafluoroborate tetraglyme can enable excellent cycling efficiency (99.9%) for more than 1000 cycles. This reversibility be attributed to stable...
The frequency-dependent aspects of transmission line transformation matrices along with their asymptotic behaviours at high and low frequencies are thoroughly investigated in this paper. Newton-Raphson (NR) method for evaluating the as smooth functions frequency is introduced. A different technique which utilizes a conventional diagonalization algorithm correlation tracking order eigenvectors eigenvalues used to confirm validity NR method. Transformation typical configurations evaluated...
A novel direction of arrival (DoA) estimation system based on a leaky-wave antenna (LWA) is presented. Compared to traditional array-based DoA techniques, which require multiple radiating elements, large feeding network, and expensive phase shifters consuming power, the proposed scheme requires only simple, compact, low-cost element no power. The estimates by measuring received power at both ports LWA using detectors as beam scanned. It implemented here composite right/left-handed (CRLH)...
A new wideband transmission line model, based on synthesizing the functions directly in phase domain, is presented. It includes complete frequency-dependent nature of untransposed overhead lines by means recursive convolutions over a wide frequency range. The model belongs to class time-domain models and designed be implemented general electromagnetic transients programs such as EMTP. Because synthesis modal transformation matrix avoided, method requires fewer at each time step than full...
A generalized coupled-mode approach of metamaterial coupled-line couplers is presented. This an extension the traditional theory (CMT) to cases arbitrary types conventional or with lines represented by most general composite right/left-handed (CRLH) transmission line models. The proposed completely rigorous and applicable any type coupler, symmetric asymmetric, metamaterial. CRLH CMT thoroughly derived closed-form results for both complex propagation constants scattering parameters are...
A novel power-recycling feedback scheme is proposed for systematic maximization of the generally poor radiation efficiency leaky-wave antennas (LWAs). In this scheme, nonradiated power at end LWA structure, instead being lost in terminating load, fed back to input through a power-combining system, which constructively adds and powers while ensuring perfect matching isolation two signals. As result, isolated (or open-loop) η <sub xmlns:mml="http://www.w3.org/1998/Math/MathML"...
A novel dispersive delay structure (DDS) based on a composite right/left-handed (CRLH)-CRLH coupler is proposed and demonstrated by both full-wave experimental results. The prototypes are compact shielded multilayer DDSs implemented in low-temperature co-fired ceramics technology. Compared to the conventional all-pass C-section DDS, CRLH DDS exhibit larger group-delay swing, which leads higher resolution analog signal processing applications, as result of their coupling capability. Moreover,...
Abstract Sodium (Na)‐metal batteries (SMBs) are considered one of the most promising candidates for large‐scale energy storage market owing to their high theoretical capacity (1,166 mAh g −1 ) and abundance Na raw material. However, limited stability electrolytes still hindered application SMBs. Herein, sulfolane (Sul) vinylene carbonate (VC) identified as effective dual additives that can largely stabilize propylene (PC)‐based electrolytes, prevent dendrite growth, extend cycle life The...
A novel millimeter-wave (mm-wave) amplitude-only direction finding (DF) antenna front-end is proposed and experimentally demonstrated based on multiport leaky-wave antennas (LWAs). The LWA realized using an array of $N$ linearly polarized slot antennas. Each engineered to produce a beam pointing along specific direction, exploiting the scanning law LWAs. Realizing progressively shifted beams angularly in space by controlling geometry each antenna, becomes sensitive large finite angular...
An exponential single-phase line model is introduced to represent nonuniform transmission lines. When the parameters are assumed vary exponentially, a set of two-port equations can be formed in frequency domain, which contain frequency-dependent functions. These functions then synthesized with rational minimum-phase-shift type. Utilizing fast recursive convolution technique, time-domain proposed reduce form similar those Bergeron's method. Plus, compatible general electromagnetic transients...
A nonuniform (NU) tapered composite right/left-handed (CRLH) leaky-wave antenna (LWA) with minimized sidelobe level (SLL) is proposed. The design of this performed using an automated cosimulation approach based on a genetic algorithm optimization. Fair agreement found between the full-wave and experimental results. results show 8-dB SLL reduction compared to uniform CRLH LWA same gain in 12-unit-cell structure.
Abstract Sodium-ion batteries have low energy density, capacity, and inferior cycling performance when compared with Li-ion batteries. However, lithium depletion poses a serious problem for the production cost of In present work, NaNi1/3Mn1/3Co1/3O2 was synthesized as cathode material Na-ion using sol–gel method. The conventional used in had been replaced material, data collected by performing charging/discharging experiments. support vector regression synchronized cross-validation simplex...
Abstract In this study, we introduce a synthesis process of bimetallic nanoparticles (BNPs) Fe/Ni and Fe/Cu utilizing concentrated Camellia sinenis extract that was optimized with solvent ratio ethanol/H 2 O 4/1 (v/v), metal 5/1 (w/w), total polyphenol content (TPC) in the solution 12.5 g.l −1 , pH = 3–4, 25 °C, reaction time ranging from 30 min to 50 min. The structural morphological characteristics resulting materials were determined using several techniques, such as scanning electron...
Abstract The propagation and radiation properties of dual composite right/left‐handed (D‐CRLH) transmission line metamaterials are presented, validated experimentally with a 1D microstrip prototype. In its fast‐wave regime, this structure operates as leaky‐wave antenna capable backfire‐to‐endfire scanning beam squinting smaller than that conventional CRLH (C‐CRLH) antennas. It is shown D‐CRLH can be further reduced by increasing the group velocity but occur, close (and possibly beyond) to...
Abstract This work focuses on the two most common techniques, including direct contact method (CM) and electrochemical (EM) in half‐cell applied for SiO 2 /C anode. After prelithiation process, anodes would be assembled coin cells paired with NMC622 cathode. According to performance, techniques could strengthen initial discharged capacity Coulombic efficiency. While nonprelithiated sample exhibits a poor of 48.43 mAh·g − 1 low efficiency 87.41% first cycle, CM EM methods illustrated better...
In this study, a novel hybrid HoFeO3–Ho2O3 nanocomposite perovskite composite is synthesized via simple coprecipitation method as stable, high-capacity anode material for lithium-ion batteries. The structure and morphology of the are characterized using advanced tools such X-ray diffraction, scanning electron microscopy, transmission all which confirm successful synthesis nanocrystals with highly interconnected porous nanohallows. At 0.1 A g−1, electrodes exhibit stable reversible capacity...
Ionic liquid-based electrolytes proved to be effective in terms of alleviating the safety problems associated with lithium/sodium ion batteries, especially for large-scale applications, due their superior thermal stability and nonflammability. The main disadvantage ionic liquids is relatively high viscosity. Adding a suitable amount organic “thinning” solvents could potential solution this problem: while electrolyte viscosity greatly reduced, electrochemical properties remain almost as good...