Dr-Muhammad Rashad

University of Michigan | U-M · Department of Mechanical Engineering

Magnesium ion batteries (MIBs) have attracted significant research attention owing to their low cost, high energy density, and natural abundance of magnesium. However, lack of compatible cathode materials hinders their further development. Herein, we presented a magnesium-lithium hybrid ion battery (MLIB) comprising Li3V2(PO4)3 (LVP) cathode and ma...

The rechargeable magnesium ion batteries (MIBs) are ideal candidates to replace currently commercialized high energy density lithium ion batteries (LIBs) owing to their cost effective and environmentally friendly nature. However, bad performance of MIBs is a big challenge for researchers. In this review, we have critically discussed the state-of-th...

The emerging energy-storage technologies must meet the requirement of low cost, reasonable safety, high natural abundance, and high energy density. The rechargeable magnesium-sulfur battery (Mg-S) meets these requirements as a new and emerging technology because of its high specific energy (1722 Wh. kg⁻¹) and dendrite free plating/stripping of magn...

Rechargeable magnesium ion batteries, which possess the advantages of low cost, high safety, high volumetric capacity, and dendrite free cycling, have emerged as one of the potential contenders alleviate the burden on existing lithium ion battery technologies. Within this context, the electrochemical performance of Mg-ion batteries at high and ultr...

The energy density of next-generation lithium-ion batteries (LIBs) can be considerably improved by replacing traditional graphite anodes with silicon nanowires (Si NWs). However, the synthesis of Si NWs is restricted due to the requirement for expensive and heavy metal catalysts for growth. Herein, for the first time, we successfully demonstrate th...

The recrystallization behavior of extruded Mg-Zn-Mn alloys was systematically investigated under different aging treatment prior to extrusion. Electron backscattered diffraction analysis was used to explore the recrystallization mechanism and corresponding effects on the basal texture of alloys during extrusion. The results show that the primary co...

Poor plasticity at room temperature has been an acute challenge for the wrought magnesium alloys. Herein, we developed a dilute Mg-0.5Mn-0.1Al alloy with exceptional rollability (80% single-pass rolling reduction) and high ductility (56.3% tensile elongation) at room temperature. A fine grain structure with grains around 1μm was obtained and a work...

Mg-9Al-1Zn (AZ91) magnesium matrix composites reinforced by Ti-6Al-4V (TC4) particles were successfully prepared via powder metallurgical method. The yield strength (YS), ultimate tensile strength (UTS), and elongation (EL) showed a mountain-like tendency with the increase of the TC4 content. The mechanical properties of AZ91 magnesium matrix compo...

A novel continuous plastic process employed on AZ31 Mg alloy called closed forging extrusion (CFE) was presented. The optical microscopy, scanning electron microscopy, electron back-scatter diffraction and tensile and compressive tests were employed to investigate the microstructure evolution and strengthening mechanism. The results indicated that...

Sodium-ion battery (SIB) has attracted extensive research attention owing to its high theoretical capacity and low cost. Herein, we synthesize bio-waste-derived activated carbon (BAC) through a facile synthesis process followed by selenium loading (using melt-infusion method) to form [email protected] composites. The synthesized BAC and its composi...

The sodium-selenium batteries (Na-Se) have attracted excessive research attention owing to their high theoretical energy density and low cost. However, their pragmatic realization is still interrupted by low electrical conductivity of the selenium and polyselenide shuttle effect. In this study, nitrogen-doped highly porous activated carbons with di...

Synthesis of new anodes is crucial for commercialization of rechargeable potassium-ion batteries (PIBs). In this work, the nitrogen-doped graphitic nanotubes (NGTs) were synthesized by solid-state reaction method. The microstructural characterization of synthesized NGTs revealed the presence of many active sites (provided by N-doping i.e. Np and Ng...

N-doped activated carbon nanostructures with different morphologies were synthesized, which exhibited specific capacities of 1394 and 526 mA h g ⁻¹ for LIBs and PIBs, respectively.

High-temperature compressive deformation behaviors of Mg–6Zn–1.5Y–0.5Ce–0.4Zr alloy were investigated at temperatures and strain rates ranging from 523 to 673 K and from 0.001 to 1 s−1, respectively. The studied alloy was mainly composed of α-Mg, Mg3Zn6Y (I phase), Mg–Zn–Ce and Mg3Zn3Y2 (W phase). The constitutive equation of Mg alloy was obtained,...

Magnesium ion batteries (MIBs) have received tremendous research attention owing to their low cost, dendrite free electroplating, and high theoretical capacities compared with lithium ion batteries (LIBs). Despite these advantages, the launching of MIBs is hindered by sluggish kinetics of the magnesium ions inside the host cathodes. Recently, sever...

In this study, aluminum alloy matrix composites reinforced with MWCNT particles by 0.5 wt.% were fabricated by a new developed technique, consisting of semi-powder metallurgy and stir casting processes. Then, hot extrusion process was applied to the composite materials. Phase analysis and microstructure investigations were performed for the as-cast...

Magnesium-lithium hybrid ion batteries have emerged as a new class of energy storage systems owing to dendrite free cycling of magnesium anode and possibility of practice of numerous conventional lithium cathodes. In present work, we used hybrid ion strategy to analyze the performance of lithium titanate based lithium cathode, magnesium metal anode...

Among post-lithium chemistries, magnesium ion batteries (MIBs) are receiving growing attention due to their divalent nature, intrinsic low cost, dendrite free cycling, and atmospheric stability. However, their realization is constrained because of the absence of suitable cathodes that can accommodate Mg2+ with fast reversibility. To bypass the slug...

Rechargeable magnesium ion batteries are potential candidates to replace the lithium ion batteries due to their high volumetric energy density, dendrite free cycling, and low costs. In present work, we have critically reviewed the recent advances made in the field of cathode materials development to achieve the high reversible capacities and workin...

TiAl-based composites reinforced with different weight fractions of Al2O3 have been successfully synthesized by hot-pressing using the pre-alloyed Ti–45Al–7Nb-0.2B and Nb2O5 powders. The microstructures, mechanical and tribological properties of composites were examined. The as-sintered TiAl composites mainly consist of γ-TiAl phase, α2-Ti3Al phase...

Polysulfide shuttle effect has remained one of the main obstacles restraining the commercialization of lithium-sulfur battery technology. Herein, we report a yolk-shell structure with nickel disulfide nanoparticles encapsulated in the CVD grown N-doped graphene (NG) nano-shell (termed as [email protected]). The synthesis process involves the growth...

Rechargeable magnesium-ion battery (MIB) has emerged as an exciting energy storage system owing to highly stable magnesiation and de-magnesiation process and high theoratical energy density. However, MIB technology is restricted by sluggish Mg2+ ion transportation inside the host cathode due to large impedance. Herein, a rechargeable Mg-Li hybrid i...

Synthesis of novel electrodes is a critical step toward realizing rechargeable potassium-ion batteries (PIBs). In present study, the graphitic nanotubes ([email protected]) implanted with cobalt nanoparticles were firstly fabricated by solid-state reaction. The results showed that in-situ synthesized [email protected] composite network offered many...

Among post-lithium ion technologies, magnesium-ion batteries (MIBs) are receiving great concern in recent years. However, MIBs are mainly restrained by the lack of cathode materials, which may accommodate the fast diffusion kinetics of Mg2+ ions. To overcome this problem, herein we attempt to synthesize a reduced graphene oxide (rGO) encapsulated t...

A CoCrFeMnNi high-entropy alloy with a high content of carbon was synthesized, and its hot deformation behavior was studied at the temperatures 800–1000 °C at the strain rates ranging from 0.001 to 0.1 s⁻¹. As-prepared alloy is a face-centered cubic-structured solid solution, with a large amount of carbides residing at grain boundaries. True stress...

In-situ synthesis of Al 2 O 3 /TiAl composite was carried out by mechanical milling of the pre-alloy Ti-45Al-7Nb-0.3W and TiO 2 powder mixture and subsequent sintering by spark plasma sintering (SPS) technique. The mixed powders experienced the initial destructive breakage stage, cold welding package stage and breaking up of boulders stage during m...

Recently, magnesium ion batteries (MIBs) have been under remarkable research focus owing to their appealingly high energy density and natural abundance of magnesium. Nevertheless, MIBs exhibit a very limited performance due to sluggish solid-state Mg2+ ions diffusion and high polarizability, which hinder their progress towards commercialization. He...

Potentially safe and economically feasible magnesium batteries (MBs) have attracted tremendous research attention as an alternative to high cost and unsafe lithium ion batteries (LIBs). In current work, for the first time, we report a novel room temperature approach to dope atomic species sodium between the vanadium oxide crystal lattice to obtain...

Coating of graphene and graphene/polymer composites on metals improves the corrosion resistance of metal substrates. On other hand, graphene embedded inside metal (especially Mg) matrices increases or decreases corrosion, is a crucial factor and must be explored. In present study, electrochemical behaviors of magnesium alloys (AZ31 and AZ61) and th...

Growth of novel carbon nanomaterials has been of great interest for researchers due to their potential applications in nano-devices. In the current work, we reported radial growth of novel octopus-like carbon nanostructures (OCNS) by chemical vapor deposition (CVD), using methane as carbon precursor gas, and Cu film sputtered on Si/SiO2 substrate a...

Outstanding mechanical properties of graphene nanoplatelets (GNPs) make them ideal reinforcement for mass production of composites. In this research, the composites were fabricated by stir-casting method. GNPs were added in 1.5 and 3.0 wt.% into Mg–3wt.% Al–1wt.% Zn (AZ31) magnesium alloy. As cast ingots were preheated for one hour and extruded at...

Graphene based nanocomposites have been investigated intensively, as electrode materials for energy storage applications. In the current work, a graphene-CNT-MnO2-PANI (GCM@PANI) nanocomposite has been synthesized on 3D graphene grown on nickel foam, as a highly efficient binder free electrode material for supercapacitors. Interestingly, the specif...

The effects of Sn addition on the microstructure and mechanical properties of gas tungsten arc butt-welded Mg–6Al– 0.3Mn (AM60) (mass fraction, %) alloy sheets were investigated by optical microscopy, scanning electron microscopy, X-ray diffraction, transmission electron microscopy, and microhardness and tensile tests. The results indicate that bot...

In present work, effect of cold rolling and aging on thermal conductivity (TC) of the as-extruded Mg-2Sn alloy was studied. Experimental results revealed that TC of as-extruded sheet decreases to value of ~105.4 W/m/K after 18% reduction rolling. TC increases with increase in aging time and regains the highest value of 126 W/m/K. Enhanced TC of col...

In current study, we have synthesized binder free nickel foam graphene MnO2@PANI (MnO2@PANI/Graphene) nanocomposite by simple hydrothermal method followed by in situ polymerization. The graphene grown on nickel foam is used as 3D scaffold conducting substrate for binder free nanocomposite electrode synthesis. Morphological characterization of the n...

Due to rapid consumption of fossil resources and rapidly increasing environmental concerns, role of renewable energy conversion and storage devices has become very vital. For energy storage applications, lithium ion batteries and supercapacitors are the ultimate solution. There have been much research focus on electrode materials for supercapacitor...

High Mn content added to Mg–6Zn–0.3Ca extruded alloy remarkably refined dynamically recrystallized (DRXed) grains, and enhanced tensile and compressive strengths without sacrificing ductility. The large amount of fine Mn precipitates of homogenized alloy that formed effectively restricted new grain growth during the subsequent extrusion and generat...

In present work, graphene nanoplatelets reinforced AZ61 magnesium alloy was synthesized by disintegrated melt deposition method. The synthesized materials were subjected to homogenization at 430 °C for 24 h and extruded at 350 °C with the ratio of 5.2:1. Experimental results revealed that graphene nanoplatelets addition have significant effect on r...

Mg–3Al–1Zn–CNTs composites, with different weight fractions (0.25–1.0 wt%) of carbon nanotubes (CNTs) were successfully fabricated via a powder metallurgy method. The processing parameters were adopted in such a way to have uniform dispersion of short length CNTs without any damage, as well as refined and dissolved β phases structures throughout th...

Conventional powder metallurgy method was used to fabricate Mg-1Cu-xAl (x=1wt.%, 3wt.%, 6wt.%, 9wt.%) alloys to study the influence of copper and aluminum on mechanical behavior of pure magnesium. Microstructural evaluation revealed the presence of Mg17Al12 and Mg2Cu intermetallic phases in synthesized alloys. Experimental results exhibited that th...

In present study, microstructural, mechanical and electrochemical properties of aluminum-graphene nanoplatelets (GNPs) composites were investigated before and after extrusion. The contents of graphene nanoplatelets (GNPs) were varied from 0.25 to 1.0wt.% in aluminum matrix. The composites were fabricated thorough powder metallurgy method and experi...

Properties of Mg-xAl-5Sn-0·3Mn alloys (x=1, 3, 6 and 9) prepared by hot extrusion are reported. The orientation relationship between Mg2 Sn precipitate and Mg matrix in Mg-9Al-5Sn-0· 3Mn alloy was determined. The yield strength of the as extruded alloys initially decreased with increasing Al content, then increased for Al contents >6 wt-%. These ch...

Chemical vapor deposition graphene growth results are inconsistent, specifying that crucial growth parameters still remain unknown or uncontrolled. In current study, we demonstrate that water can be used as a special tool to control thickness and size of graphene islands, during ambient pressure chemical vapor deposition growth of graphene. Large a...

In this study, the effect of micron-sized titanium and aluminum addition on the microstructural, mechanical and work-hardening behaviour of pure Mg is investigated. Pure Mg was reinforced with 10%Ti and 10%Ti-1%Al particulates were synthesized through semi-powder metallurgy route followed by hot extrusion. Semi-powder metallurgy appears to be promi...

Graphene is the strongest material ever tested and graphene nanoplatelets (GNPs) may be added to metal matrix to produce composites of better mechanical properties. In this chapter, the effects of GNPs’ addition on the mechanical properties of pure Mg and its alloys (Mg–1Al, Mg–10Ti and Mg–1Al–1Sn) is reviewed. Mg-graphene composites were fabricate...

Regular hexagonal embedded ZnO nanorods were successfully prepared by a simple hydrothermal method. The addition of urea as a homogeneous precursor was found to play a vital role in the embedding of secondary nanorods. The nanostructures were characterized by XRD, SEM, and EDS. The gas-sensing properties of secondary grown embedded nanorods were re...

The Mg-1%Al-1%Sn-0.18% graphene nanoplatelets (GNPs) composite is fabricated by semi powder metallurgy method followed by hot extrusion. Microscopic observation revealed the uniform distribution of GNPs in the matrix. The addition of 0.18. wt% GNPs to Mg-1wt%Al-1wt%Sn alloy lead to increase in tensile strength (i.e., from 236 to 269. MPa). The incr...

New magnesium nano-composites reinforced with Copper-graphene nanoplatelets hybrid particles, have been prepared through semi powder metallurgy method. Compared with monolithic Mg, the Mg-1Cu-xGNPs nano-composites exhibited higher tensile and compressive strength. In tension, nano-composites revealed substantial enhancement in elastic modulus, 0.2%...

New magnesium nano-composites reinforced with Copper-graphene nanoplatelets hybrid particles, have been prepared through semi powder metallurgy method. Compared with monolithic Mg, the Mg-1Cu-xGNPs nano-composites exhibited higher tensile and compressive strength. In tension, nano-composites revealed substantial enhancement in elastic modulus, 0.2%...

Nano-scaled ZrNbAlN films with different negative bias voltages (Vb) were deposited on bronze substrate and Si (100) wafers by a reactive unbalanced magnetron sputtering technique. Composition and structure properties were characterized by X-ray photoelectron spectroscopy and X-ray diffraction. It is found that mole concentrations of Zr and Nb are...

The Mg-Al-Graphene nanoplatelets (GNPs) nano-composites were synthesized using the powder metallurgy method. The effect of Al-GNPs hybrids addition in to pure Mg was examined through tensile and Vicker Hardness tests. The GNPs content was kept constant (0.18 wt.%) and Al content was varied from 0.5wt% to 1.5 wt%. The increase in Al content led to i...

The Mg-Al-graphene nanoplatelets (GNPs) nano-composites were synthesized using the powder metallurgy method. The effect of Al-GNPs hybrids addition in to pure Mg was examined through tensile and Vicker hardness tests. The GNPs content was kept constant (0.18 wt.%) and Al content was varied from 0.5 wt.% to 1.5 wt.%. The increase in Al content led t...

ZnO nanodisks exhibiting regular hexagonal structures were successfully synthesized using two surfactants via a hydrothermal method. The surfactants, namely, cetyltrimethylammonium bromide and sodium dodecyl sulfate, had vital functions in the formation of nanodisk structures. The fabricated ZnO nanodisk-based sensor was exposed to reductive gases....

In recent years, graphene has attracted considerable research interest in all fields of science due to its unique properties. Its excellent mechanical properties lead it to be used in nano-composites for strength enhancement. This paper reports an Aluminum–Graphene Nanoplatelets (Al/GNPs) composite using a semi-powder method followed by hot extrusi...

In recent years, graphene has attracted a great research interest in all fields of sciences due to its unique properties. Its excellent mechanical properties lead it to be used in nanocomposites for strength enhancement. In current work, a new magnesium-graphene nanoplatelets composite is fabricated for the first time using semi-powder metallurgy m...

In recent years, graphene has attracted a great research interest in all fields of sciences due to its unique properties. Its excellent mechanical properties lead it to be used in nanocomposites for strength enhancement. In current work, a new magnesium-graphene nanoplatelets composite is fabricated for the first time using semi-powder metallurgy m...

Effect of graphene nanoplatelets (GNPs) addition on mechanical properties of magnesium–10wt%Titanium (Mg–10Ti) alloy is investigated in current work. The Mg-(10Ti + 0.18GNPs) composite was synthesized using the semi powder metallurgy method followed by hot extrusion. Microstructural characterization results revealed the uniform distribution of rein...

Carbon nanocoils (CNCs) with different diameters have been synthesized on different substrates by thermal chemical vapor deposition using Fe films as catalysts prepared by ion sputtering. It is found that CNCs with diameters greater than 100 nm are obtained as the main products in large quantities on Fe film coated indium tin oxide substrates. Howeve...

Nanocrystalline ZnO thin films have been fabricated by a multi-step sol-gel method using spin coating technique. Zinc acetate dihydrate, 2-methoxyethanol and monoethanolamine were used as a starting material, solvent and stabilizer, respectively. X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) were employed to characterize struc-...