Van Man Tran

Van Man Tran
VNUHCM-University of Science · Department of Physical Chemistry Office of Science & Technology

PhD

About

120
Publications
34,373
Reads
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750
Citations
Introduction
Dr. TRAN Van Man is actual Head of the Office of Science and Technology at University of Science, VNUHCM. He received his B.Sc in 1998, M.Sc in 1999 from University of Science in Physical Chemistry. He obtained Ph.D in 2009 from Grenoble National Insitute of Technology, France. His research include fuel cell, rechargeable batteries, materials for power sources and the hydrogen evolution using photocatalysis or biomass conversion. He has published more than 40 peer-reviewed journal articles.
Additional affiliations
January 2018 - October 2019
VNUHCM-University of Science
Position
  • Professor (Associate)
January 2018 - October 2019
VNUHCM-University of Science
Position
  • Professor (Associate)
January 2003 - August 2015
Ho Chi Minh City University of Science
Position
  • Head of Department

Publications

Publications (120)
Article
Full-text available
This paper illustrates the synthesis and physical characterization of a novel deep eutectic solvent consisting of lithium bis(fluorosulfonyl)imide (LiFSI) and acetamide (Ace) as a suitable electrolyte for supercapacitor. The formation of DES is finally pronounced in a liquid state at room temperature with a suitable molar ratio of LiFSI: Ace = 1:5(...
Article
Full-text available
Bambusa stenostachya Hack. was subjected to two pretreatment methods including hydrothermal pretreatment and steam explosion methods for evaluating their feasibility hydrolysis to obtain sugars. Batch cultivation by a mixture of microorganisms isolated from sludge in 48 h was carried out to investigate the influence of these pretreatment methods on...
Article
In this research, natural anthracite coal (ATC) originated from Vang Danh - Quang Ninh province in Viet Nam was firstly chemically purified and then calcined in inert gas (Ar) at 800 o C for different periods (t = 2, 3 and 6 h) to remove all the impurities and enrich the carbon content. The purity and graphitized structure of treated coal proved si...
Article
High voltage Li-ion batteries have been expected a forward technology designed for vehicles, marines and other high power and energy density applications 1–3 . Among high voltage cathodes, LiNi 0.5 Mn 1.5 O 4 is considered a promising cathode to reduce the battery cost as well as environmental hazard issues 4,5 . However, a high operation potential...
Article
Full-text available
Fossil fuels, the hydrocarbons within Earth’s crust impact on the environment and atmosphere during burning in internal combustion engine, jet engine to produce energy have to be limited and all the countries have turned their attention to renewable energy. Vietnam will reach its net-zero carbon emission target by 2050 and call for fairness and jus...
Article
The water states of poly(styrene sulfonic acid) (PSSA) grafted poly(ethylene-co-tetrafluoroethylene) copolymers (ETFE-PEMs) with grafting degree (GD)=8.8-30.5% are investigated under ambient conditions by using FT-IR analysis. Detailed analysis of the FT-IR spectra of ETFE-PEMs allows the observation of each component of water in the two broad band...
Article
Germanium (Ge) is a potential anode material in lithium-ion batteries (LIBs) due to its ultrahigh theoretical capacity (1623 mAh·g⁻¹). However, Ge-based anodes suffer from huge volume variation during lithium insertion/extraction, leading to fast capacity fading. In this study, the GeO2/Ge composite was synthesized by facile reducing GeO2 by magnes...
Article
The subnano level free‐volume hole features of poly(styrene sulfonic acid) (PSSA) grafted poly(ethylene‐co‐tetrafluoroethylene) polymer electrolyte membranes (ETFE‐PEMs) are investigated using positron annihilation lifetime spectroscopy (PALS). The hole sizes are formed mainly at the graft‐polymerization step and are not altered dramatically at the...
Article
Chemical degradation in the presence of H2O2 aqueous solution and water states of poly(styrene sulfonic acid) (PSSA) grafted poly(ethylene‐co‐tetrafluoroethylene) polymer electrolyte membranes (ETFE‐PEMs) with grafting degree (GD) of 8.8%–21.1% are investigated using Fourier‐transform infrared spectroscopy (FT‐IR), thermogravimetric analysis (TGA),...
Article
Battery Thermal Management System (BTMS) is crucial to maintain peak temperature and temperature difference of lithium-ion battery pack in appropriate range, thus ensuring best performance, extended cycle life and safety. Liquid cooling BTMS is extensively researched for prismatic cells, but only a few studies are present on application of liquid c...
Article
The effect of high‐energy radiation in poly(ethylene‐co‐tetrafluoroethylene) (ETFE) films has been extensively investigated. However, the microstructure and molecular changes of the film under different irradiation conditions are less well‐understood. In this study, microstructure and molecular changes in ETFE films induced by gamma and electron ir...
Article
We evaluated methods aimed at improving the performance of full-cell including: i) Presodiating HC by discharging to 0.1 V in half-cell; ii) Presodiating HC by contacting with Na metal; iii) Activating by low current charging at a rate of C/20 initially, iv) Constant current charging to a cutoff voltage of 3.95 V then hold the voltage for 6 hours....
Article
In this study, we aimed to evaluate the effect of sulfolane (SL) as a co-solvent in conventional carbonate-based electrolytes and its compatibility with a LiMn2O4 (LMO) cathode. The amount of SL was varied from 10 to 50 vol.% in an EC-DMC mixture (1:1 vol. ratio) within a 1.0-M lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt. The thermal p...
Article
Counter electrode of Cu2S on fluorine-doped tin oxide glass, which was synthesized by chemical bath deposition method in a nitrogen-purged environment with varying precursors and temperatures, is used for quantum dot sensitized solar cell fabrication. The morphology, composition and crystalline structure of the Cu2S film were characterized by scann...
Article
In this work, the Sn/g-C3N4 composite was successfully synthesized via a facile chemical reduction method, in which Sn nanoparticles dispersed well on the porous framework of g-C3N4. The composite is used as anode material for Lithium-ion battery, which exhibits significantly improved cycling performance compared to the pure Sn. This result is due...
Article
A series of N-heterocyclic⊂VNU-23 materials have been prepared via the impregnation procedure of N-heterocyclic molecules into VNU-23. Their structural characterizations, PXRD, FT-IR, Raman, TGA, 1H-NMR, SEM-EDX, and EA, confirmed that N-heterocyclic molecules presented within the pores of parent VNU-23, leading to a remarkable enhancement in proto...
Article
Sodium-ion batteries (SIBs) are rapidly developing interest among post-Lithium-ion batteries (LIBs) research. High capacity and structural stable cathode materials are needed for viable SIBs. In this study, P2-NaxMn0.5Co0.5O2 (NMC55) was synthesized and characterized the sodium storage properties. The material shows a remarkable increase in capacit...
Article
In this work, highly concentrated electrolytes were prepared by dissolving tetrafluoroborate (LiBF4) salt in the two solvents including tetramethylene sulfone (TMS) and trimethyl phosphate (TMP) with different mole ratios. The results indicated that the electrolyte LiBF4/TMS (1:3) (~3.4 M) possessed the highest oxidation stability of 6.2 V (vs. Li+...
Article
The morphology and elemental compositions at the surface of poly(styrene sulfonic acid) (PSSA) grafted poly(ethylene‐co‐tetrafluoroethylene) polymer electrolyte membranes (ETFE‐PEMs) in a grafting degree (GD) range of 0%–127% are investigated by using FE‐SEM and XPS analyses. The concentrations of elemental components at the surface are not a linea...
Article
Ni-rich layered oxides are currently the state-of-the-art material of Lithium-ion batteries due to the balance between the cost, power and energy density. In this work, Ni-rich O3-type NaxNi0.76Mn0.14Co0.10O2.04 (NMC) material was synthesized by the conventional solid-state reaction and investigated as a cathode material for sodium-ion batteries. R...
Article
Full-text available
In recent work, P2/P3-NaNi1/3Mn1/3Co1/3O2 (NaNMC) was obtained by the sol-gel process followed by calcination of the precursor at 900°C for 12 h. The electrochemical properties of NaNMC were investigated in the voltage range of 2.0–4.0 V. The material exhibited an initial discharge capacity of 107 mAh·g⁻¹ and good capacity retention of 82.2% after...
Article
Full-text available
This research work demonstrates a novel hybrid electrolyte based on a deep eutectic solvent (DES) combined with organic solvents for high-performance supercapacitors. DES was formed between ethylene glycol (EG) and lithium bis((trifluoromethyl)sulfonyl) imide (LiTFSI) and diluted by ethylene carbonate (EC) or acetonitrile (AN) with different amount...
Article
Recently, state-of-the-art and perspective Li-ion batteries have been focused on NMC622 cathode for energy densities and power densities enhancement. This work introduces a novel approach of combining experimental data generation and computational power for understanding the effects of electrolyte additives including vinylene carbonate (VC), lithiu...
Article
The extensive ultrasmall-angle X-ray scattering measurements are performed in order to investigate the changes of lamellar grains of poly(styrenesulfonic acid)-grafted poly(ethylene-co-tetrafluoroethylene) polymer electrolyte membranes (ETFE-PEMs) that occur during the alteration of grafting degree (GD) under dry and immersed conditions. The lamell...
Article
Full-text available
Many pretreatment techniques were used to change the physical and chemical structure of the lignocellulosic biomass and improve hydrolysis rates for conversion to fuel. A hydrothermal (HT) combined chemical treatment (acid or alkaline) and steam explosion (SE) at various pretreatment conditions were applied on bamboo biomass to study the hydrolysis...
Article
Enhancing and investigating the photocatalytic activity over composites for new models remains a challenge. Here, an emerging S-scheme photocatalyst composed of 2D/0D g-C3N4 nanosheets-assisted SnO2 nanoparticles (g-C3N4/SnO2) is successfully synthesized and used for degrading nitrogen oxide (NO), which causes negative impacts on the environment. A...
Article
Introduction: Localized high concentration electrolytes (LHCE) have been intensively studied due to their unique properties, especially in suppressing the Na dendrite formation and long-term cycling. Therefore, the low electrochemical performance of the P2-type cathode can be overcome by using LHCE. Methods: P2-type sodium layered oxides Na2=3Mn2=3...
Article
The efficient design of battery thermal management systems (BTMSs) plays an important role in enhancing the performance, life, and safety of electric vehicles (EVs). This paper aims at designing and optimizing cold plate-based liquid cooling BTMS. Pitch sizes of channels, inlet velocity, and inlet temperature of the outermost channel are considered...
Article
Full-text available
This research aims to evaluate the influence of different 3D metals (Fe, Co, and Ni) substituted to Mn on the electrochemical performance of P2-NaxMe1/3Mn2/3O2 material, which was synthesized by the coprecipitation process followed by calcination at high temperature. X-ray diffraction (XRD) results revealed that the synthesized Mn-rich materials po...
Article
Full-text available
In this work, Cu-doped NaFe0.5Co0.5O2 was easily prepared by a one-step solid-state reaction and studied the effect of copper salt precursors including CuCl2 and Cu(OAc)2 on the structure and electrochemical properties. XRD patterns of the synthesized materials all exhibited diffraction peaks of O3-type layered oxide with high crystallinity and neg...
Article
For about 20 years, microbial fuel cells (MFCs) are an emerging technology that has gained attention for its new wastewater treatment and energy generation , especially its ability to convert chemical energy from a broad range of substances into electricity. However, MFC has not been widely commercialized due to low efficiency. Studies have shown t...
Article
Ionic liquids (ILs) have been considered as an alternative class of electrolytes compared to conventional carbonate solvents in rechargeable lithium/sodium batteries. However, the drawbacks of ILs are their reducing ionic conductivity and their large viscosity. Therefore, mixtures of alkyl carbonate solvents with an IL and a sodium bis(trifluoromet...
Article
Full-text available
In this work, the layered structure LiNi1/3Mn1/3Co1/3O2 (LiNMC) served as a host to enable sodium-ion intercalation. LiNMC was initially charged in Li-half-cell at C/25 rate up to 4.5 V to extract maximum of Li⁺ ions and then discharged at the same rate in Na-half-cell down to 2 V for full sodiation to form NayNMC phase. The electrochemical charact...
Article
In this study, a facile hydrothermal method, which was employed as a simple and inexpensive technique, was proposed to prepare flake-like NiCo2O4/multi-walled carbon nanotubes (MWCNTs) sensor. The direct current signal measurements were performed at a frequency of 10–100 kHz at room temperature. NiCo2O4 (7.46 pF) and NiCo2O4/MWCNTs (24.75 pF) were...
Article
Lithium-ion batteries (LIBs) have a profound impact on our modern society because of its diverse applications. In the state-of-the-art battery technology, the procedure for slurry preparation remains an important challenge which is vital for electrochemical performance enhancement and usually exhibits higher cost. In this work, two procedures are d...
Article
In this report, the peroxymonosulfate activation over Ag/ZnO heterojunction under visible light (Ag/ZnO/PMS/Vis) for p-nitrophenol (p-NP) contaminant degradation was conducted in detail. Herein, the catalyst dosage was decreased, and the results showed that a dosage of 0.5 g L–1 Ag/ZnO and 4 mM PMS almost completely degraded 30 mg L–1 p-NP after 90...
Article
Deep eutectic solvents (DESs) have been considered the existing alternatives that are analog and cheap to ionic liquids for their favorable properties (e.g., chemical stability, low flammability, and low vapor pressure). In the present study, the physical and electrochemical properties of ethylene glycol (EG) and lithium bis[(trifluoromethyl)sulfon...
Article
High voltage cathode LiCoPO4 has been taken great interest for high power Li-ion batteries (LIBs). Though Co enhance the cyclability, capacity of materials, Co concentration should be reduced in electrode materials due to its high cost and toxic. In this work, the solvo-thermal reaction following by pyrolysis in inert Ar was investigated to synthes...
Article
Introduction: Finding a novel photocatalyst for photocatalytic degradation operating in the wavelength range from UV to visible light has been considered a great potential for environmental remediation. Herein, TiO2 nanocubics (NCs) decorated Ag nanoparticles (NPs) with various concentrations were developed. Methods: The crystal structure, morpholo...
Article
LiNi0.5Mn1.5O4 (LNMO), a high‐voltage spinel, has attracted great attention owing to its low cost and high operating voltage. Many great efforts have been devoted to developing full‐cell of LNMO/graphite because of electrolyte oxidation issues at such high voltage. In this work, the effect of additives including vinylene carbonate (VC) and lithium...
Article
Rice husk is a common agricultural waste and an abundant source in Viet Nam. In terms of composition, rice husk is a silica-rich material (SiO2) so it can be used to prepare negative electrode materials for rechargeable Li-ion batteries. Recent processes of synthesizing the silica materials for the rechargeable batteries are often complex, expensiv...
Article
The battery performance not only depend on the electrodes nature but also depend on the choice of electrolyte consisting of salts and organic solvents. The development of electrolytes compatible with both cathode and anode materials is essential for enhancing the performance of practical full-cell Na-ion batteries. Among electrode with difference N...
Article
This study successfully demonstrates the recovery of energy from the effluent of hydrogen fermentation (EHF) by generating electrical power in batch dual-chamber microbial fuel cells (MFCs) inoculated with Shewanella oneidensis MR-1. The effluent obtained from the hydrogen fermentation process of pretreated liquid on Bambusa stenostachya Hack. bamb...
Article
To design safe and electrochemically stable electrolytes for lithium-ion batteries, this study describes the synthesis and the utilization of new deep eutectic solvents (DESs) based on the mixture of 2,2,2-trifluoroacetamide (TFA) with a lithium salt (LiTFSI, lithium bis[(trifluoromethane)sulfonyl]imide). These prepared DESs were characterized in t...
Article
Past studies focused on proposing new materials for batteries components, state of health (SOH) prediction, thermal design, equivalent circuit modeling, and so on. Those studies have been implemented on individual basis on a single battery or battery pack. However, there is hardly any research found that encompasses all the multidisciplinary aspect...
Article
This work focuses on the formation of Ir3+ dopants in host TiO2 matrix to decrease the bandgap energy and a built-in electric field at the interface between Iro and TiO2. X-ray diffraction (XRD) results show that the anatase percentage is increased from 70 to 90% with increasing the Ir doping concentration using the hydrothermal procedures at 200 °...
Article
Full-text available
Stability of electrolyte with higher electrochemical and structural performance is a key aspect for achieving greater longevity of cycle life of battery. In this paper, we investigated the electrochemical performance of sol–gel Na0.44MnO2 (SG‐NMO) as cathode material in lithium batteries within non‐aqueous lithium electrolyte. The SG‐NMO was prepar...
Article
The liquid electrolyte transports lithium ions from anode to cathode during charging, and vice versa. The choice of electrolyte is also important since high ionic conductivity between electrodes is essential for high-performance batteries. Liquid electrolytes with lithium salt dissolved in an organic solvent have been widely used since the 1970s wh...
Article
Layered oxides are promising electrode materials for sodium-ion batteries, the next generation of rechargeable batteries. The layered oxides with the tránition metallic manganese and iron have paid more attention due to its low-cost, eco-friendly, and facile preparation. In this work, the metallic sodium oxides with a layered structure based on Fe...
Article
Full-text available
Sodium ternary layered oxides, typically NaNi1/3Mn1/3Co1/3O2 (NMC), are layered structures analogous to LiNi1/3Mn1/3Co1/3O2, and have been utilized extensively in sodium-ion batteries (SIBs). The cathode material was successfully synthesized by a sol-gel process followed by a calcination step at 900 °C for 12 h. The triple-phase integration denoted...
Article
Introduction: In recent decades, the antimicrobial surfaces/coating properties towards a longlasting microbicidal effect have drawn enormous attention by researchers, they have been developed and used in a wide variety of high-touch hospital devices as a potential approach. Methods: In this work, Ag NPs was synthesized by sputtering method at the d...
Article
Full-text available
In the recent years, olivine LiFePO 4 has been considered as a prospective cathode material for lithium-ion batteries. However, low conductivity is an obstacle to the commercialization of LiFePO 4 ; doping the transition metal such as Mn and Ni is one of the solutions for this issue. This work aimed to synthesize the Mn-doped olivines LiMn x Fe 1−...
Article
To investigate the combined effects of calcination temperature and carbon nanotube (CNT) proportion, we have synthesized LiFePO4 (LFP) using hydrothermal process using glucose at various calcination temperatures (600 °C, 700 °C, 800 °C). The morphology of the synthesized LFP was investigated by Scanning electron microscope (SEM). Structural changes...
Article
Full-text available
This work aimed to prepare the spinel phase Li 4 Ti 5 O 12 by a combination of the low-temperature precipitation technique and assisted calcination step. X-ray diffraction (XRD) revealed that the intermediated phase was Li 2 TiO 3 , and the spinel phase could be evidently formed at 700°C for 12 to 20 hours. The morphology of spinel powder, determin...
Article
The sodium-ion batteries have low energy density, low capacity and inferior cycling performance as compared to Li-ion batteries. However, lithium depletion poses a serious problem for production and cost of Li-ion batteries. In the present work, a NaNi1/3Mn1/3Co1/3O2 was synthesized as cathode material for Na-ion batteries using the sol-gel method....
Article
Full-text available
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 to their superior thermal stability and nonflammability. The main disadvantage of ionic liquids is their relatively high viscosity. Adding a suitable amount of...
Article
In this paper, we have fabricated NaNi1/3Mn1/3Co1/3O2 cathodes using a hydroxide co-precipitation followed by a multi-step solid state process. The prepared cathodes were quenched at varied calcination temperatures cycles. Formation of P3 phase was observed at 600°C quenching temperature as confirmed by x-ray diffraction (XRD) studies. The transiti...
Article
A [email protected] composite catalyst was prepared by selective incorporation of Pd nanoparticles into the pores of an alkyne-containing metal-organic framework (MOF) VNU1. The host support VNU1 was synthesized from 1,4-bis(2-[4-carboxyphenyl]ethynyl)benzene (H2CPEB) alkyne-containing linker and Zr(IV) salt using the solvent-thermal method. The st...
Article
In present study, a series of single modified TiO2 nanotubes with varying amounts of Cu was synthesized via two-step chemical solution method and studied as photocatalyst for H2 production under sunlight irradiation. The results indicate significant improvement of photocatalytic activity for TiO2 nanotubes modified Cu nanoparticles compared with pr...
Article
In 21th century, rechargeable batteries are main key of modern technology in many applications from portable devices (smartphone, laptop) to large-scale (hydride electric vehicle-HEV, smart grid system). Among the rechargeable batteries, Li-ion battery (LIB) is outstanding member due to the highest gravimetric as well as volumetric capacity; and So...
Article
Full-text available
O3-NaFe0.5Co0.5O2 layered cathode material was synthesized by solid state reaction at 900 oC followed by a quenching step in argon atmosphere. The chemical composition and morphology of synthesized material were analyzed by Atomic Absorption Spectroscopy (AAS) and Scanning Electron Microscopy (SEM). The electrochemical properties were evaluated by...
Article
Full-text available
Introduction: Ionic liquids (ILs) have become a prospective candidate to replace the conventional electrolytes based on the volatile organic-solvents in lithium-ion batteries. However, the drawbacks of high viscosity and low ionic conductivity have restricted the high rate capacity and energy density in practical batteries. With the aims to resolve...
Article
Full-text available
This work aimed at preparing the electrode composite LiFePO 4 @carbon by hydrothermal and the calcination process was conducted at 600, 700, and 800°C. The structure and morphology were determined by X-ray diffraction (XRD), SEM, Raman spectroscopy, X-ray photon spectroscopy (XPS), and thermal analysis. The XRD refinement’s results point out the or...
Article
Gel polymer electrolyte (GPE) films using polyvinylidene fluoride – hexafluoropropylene (PVdF – HFP) matrix were prepared for aim to achieve good sodium-ion conductivity at room temperature. GPE of PVF-HFP were formed by microporous PVDF-HFP membranes filled and swollen in different liquid electrolytes: GPEs were formed by microporous PVDF-HFP memb...