Julia Amici

Julia Amici
Politecnico di Torino | polito · DISAT - Department of Applied Science and Technology

PhD in Material Sciences and Technology

About

64
Publications
6,055
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903
Citations
Citations since 2017
42 Research Items
813 Citations
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20172018201920202021202220230100200300400
20172018201920202021202220230100200300400
20172018201920202021202220230100200300400

Publications

Publications (64)
Article
Full-text available
Potassium-based batteries represent one of the emerging classes of post-lithium electrochemical energy storage systems in the international scene, due to both the abundance of raw materials and achievable cell potentials not far from those of lithium batteries. In this context, it is important to define electrodes and electrolytes that give reprodu...
Article
Developing efficient electrocatalysts for oxygen reduction reaction (ORR) is fundamental to bring the Li–O2 technology closer to practical applications. However, the majority of studied catalysts for this application are either precious metals or cobalt based, which represents an obstacle for a larger scale development, both from an economical and...
Article
The last decade has seen a rapid technological rush aimed at the development of new devices for the photovoltaic conversion of solar energy and for the electrochemical storage of electricity using systems such as supercapacitors and batteries. The next (and even more necessary) step concerns the integration between conversion and storage systems, a...
Article
Solid polymer electrolytes are considered a useful solution for improving the safety of lithium metal batteries. However, these macromolecular systems show low ionic conductivity and suffer from limited cyclability at room temperature. In this work we propose the UV-induced, solvent-free radical copolymerization of poly(ethylene glycol) methyl ethe...
Article
The preparation and characterization of the first photocured gel polymer electrolyte for potassium batteries is presented. The use of UV-induced radical polymerization aims at developing a sustainable and rapid way to produce polymer electrolytes without using further processes to separate solvents and by-products. The gel polymer electrolyte displ...
Article
Full-text available
Nowadays, Li–S batteries are considered as one of the most promising alternatives to Li-ion technology in the near future, thanks to their high specific capacity and their significantly lower environmental impact and production costs. Consequently, many efforts have been directed to tackle with the inherent issues that affect Li–S batteries. One of...
Article
Full-text available
Self-healing materials are actively studied in order to extend the lifetime and performance of batteries. Dynamic covalent networks have recently emerged as one of the best self-healable materials which allow thermosets to be reprocessed and recycled. Among all the different exchangeable bonds studied over the last few years, hindered urea bonds ap...
Article
Full-text available
In this study, biobased gel polymer electrolyte (GPE) membranes were developed via the esterification reaction of a cardanol-based epoxy resin with glutaric anhydride, succinic anhydride, and hexahydro-4-methylphthalic anhydride. Nonisothermal differential scanning calorimetry was used to assess the optimal curing time and temperature of the formul...
Article
Full-text available
Potassium batteries are showing interesting peculiarities as large‐scale energy storage systems and, in this scenario, the formulation of polymer electrolytes obtained from sustainable resources or waste‐derived products represents a milestone activity. Here, a lignin‐based membrane is designed by crosslinking a pre‐oxidized Kraft lignin matrix wit...
Article
Lithium-sulphur battery technology promises much higher energy storage capacity compared to common Li-ion commercial batteries. Li–S batteries have high theoretical capacity of 1672 mAh g⁻¹, thanks to conversion reaction from solid sulphur to lithium polysulfides (LiPSs). Unfortunately, few issues are still hindering their commercialization. The ma...
Article
This roadmap presents the transformational research ideas proposed by “BATTERY 2030+,” the European large-scale research initiative for future battery chemistries. A “chemistry-neutral” roadmap to advance battery research, particularly at low technology readiness levels, is outlined, with a time horizon of more than ten years. The roadmap is center...
Article
Manufactured globally on industrial scale, cyclodextrins (CD) are cyclic oligosaccharides produced by enzymatic conversion of starch. We daily use CD as unseen components of food, cosmetics, textiles and pharmaceutical excipients. The synthesis of active material composites from CD resources can enable or enlarge the effective utilization of these...
Article
Beyond Li-ion batteries, one of the most promising technology is the Lithium-Sulphur (Li-S) not only for its higher theoretical energy density (about 2600 Wh kg⁻¹) but because sulfur is relatively inexpensive and non-toxic. However, the Li-S battery suffers from “shuttle effect” of polysulfides. Thus, restricting shuttling means increasing cell per...
Article
Composite polymer electrolytes (CPE) are a very promising strategy for using lithium metal anodes safely. These electrolytes are formed by polymeric matrices in which ceramic nanoparticles are incorporated to modify their mechanical and conduction properties. In this work a methacrylate-based polymer matrix containing 63 wt% of ZrO2 nanoparticles (...
Article
Photoelectrochromic systems are devices designed for large-scale manufacturing of smart windows, capable of changing their transmittance according to external environmental conditions. This communication proposes the replacement of the two most critical photoelectrochemical device components studied so far, namely the counter electrode and the redo...
Patent
Full-text available
An electrochemical device includes an electrochemical cell , wherein the electrochemical cell including a first anode and a first electrolyte , and a supercapacitor , wherein the super capacitor including a second anode and a second electrolyte. The electrochemical cell and the supercapacitor are arranged in series and a single cathode shared both...
Article
Full-text available
Li-O2 batteries represent a promising rechargeable battery candidate to answer the energy challenges our world is facing, thanks to their ultrahigh theoretical energy density. However, the poor cycling stability of the Li-O2 system and, overall, important safety issues due to the formation of Li dendrites, combined with the use of organic liquid el...
Article
Full-text available
Magnesium-based batteries represent one of the successfully emerging electrochemical energy storage chemistries, mainly due to the high theoretical volumetric capacity of metallic magnesium (i.e., 3833 mAh cm−3 vs. 2046 mAh cm−3 for lithium), its low reduction potential (−2.37 V vs. SHE), abundance in the Earth’s crust (104 times higher than that o...
Article
Lithium polysulfides shuttling and limited conductive pathways of the host matrix impose limits on the level of sulfur utilization and long cycle life performance of lithium sulfur batteries. However, precisely designed core shell structures of conductive elements can offer a viable solution. Herein, a facile and scalable approach is presented to s...
Article
Composites of montmorillonite (MMT) and polyaniline (PANI) were synthetized through a facile and inexpensive method. Two samples with different MMT:PANI ratios were studied and deeply characterized by XRD, TG, zeta potential, FTIR and XPS measurements. On one hand, the sample with ratio MMT:PANI = 87:13 was an intercalated composite, were polyanili...
Article
Development of high-performance SnO2 anodes is hampered by its peculiar electrochemical behavior, characterized by two processes: conversion and alloying reactions. The conversion reaction being irreversible leads to specific capacities lower than theoretical, however rational design of nanosized SnO2 can mitigate this issue, though SnO2 low conduc...
Article
Reversible redox of sulfur to lithium sulfide through a series of lithium polysulfides (LiPS) still pose a key challenge to appreciate high-performance sulfur cathodes mainly because of shuttling phenomenon and sluggish kinetics. Herein, a simple novel synthetic approach has been presented to realize porous vanadium nitride oxide (VO x N y) nanopar...
Article
Synthesis of SnO2 powders with different shapes can be achieved by different approaches including wet and dry methods. One constrain of wet production is the complexity of process control that is not always possible when scale-up of active materials for electrodes is considered. On the other hand, simple solid state methods carried out at low tempe...
Article
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The Authors regret that, in the published version, Figure 2 was substituted by Figure 1.
Article
Full-text available
Nanostructured materials possess unique physical-chemical characteristics and have attracted much attention, among others, in the field of energy conversion and storage devices, for the possibility to exploit both their bulk and surface properties, enabling enhanced electron and ion transport, fast diffusion of electrolytes, and consequently high e...
Article
Full-text available
While used in minor proportion respect to other components in cathode formulations, binders play a crucial role in lithium batteries cathode. This is particularly true in Li-O 2 batteries which represent a very harsh environment mainly because of the formation, upon cycling, of very aggressive superoxide radicals. In such batteries, the use of cata...
Article
Full-text available
The article New eco-friendly low-cost binders for Li-ion anodes, written by D. Versaci, R. Nasi, U. Zubair, J. Amici, M. Sgroi, M. A. Dumitrescu, C. Francia, S. Bodoardo and N. Penazzi, was originally published electronically on the publisher’s internet portal (currently SpringerLink).
Article
A well-known strategy to achieve higher energy density in lithium-based batteries consists in using metallic lithium as the anode, however, the problematics associated are many and well-known. One solution to enhance battery safety consists in protecting lithium by using a solid electrolyte. Herein the preparation of a new solid polymer composite e...
Article
Full-text available
Lithium sulfur technology is a promising near-future battery owing to its high theoretical capacity and low cost materials; nonetheless, its commercial viability is hindered owing to the use of lithium anode. Reactive Li is prone to dendritic growth, causing short-circuits and aggravating electrolyte depletion. Here, lithiated silicon sulfur (SLS)...
Article
Full-text available
Dextrin‐based nanosponges (NS) are hyper‐cross‐linked polymers characterized by the ability to encapsulate a great variety of substances in liquid phase. More important, dextrin‐based nanosponges are nanostructured within a three‐dimensional network. Here, an amorphous modified polyetheretherketone (PWC) and nanosponges (NS) derived from cross‐link...
Article
Full-text available
In Li‐S batteries, it is important to ensure efficient reversible conversion of sulfur to lithium polysulfide (LiPS). Shuttling effects caused by LiPS dissolution can lead to reduced performance and cycle life. While carbons rely on physical trapping of polysulfides, polar oxide surfaces can chemically bind LiPS to improve the stability of sulfur c...
Article
Full-text available
In the production of commercial Li-ion batteries, the active materials slurries are generally prepared using polyvinylidene fluoride (PVdF) as binder because of its good adhesion properties and electrochemical stability. Unfortunately, there are some disadvantages related to the use of PVdF: the most important is the use of toxic and environmentall...
Article
Full-text available
A novel approach is developed to synthesize microporous carbon spheres with pore size ranges from 5 to 11 Å from hyper-cross-linked polymer β-cyclodextrin. Sulphur is incorporated in the micropores by solution impregnation followed by melt infusion. The resultant carbon sulphur (C/S) composite is wrapped in reduced graphene oxide (rGO) to provide c...
Article
Full-text available
Silicate materials have been proposed as alternative cathodes for Li-ion battery applications. A novel mixture of silicates, labelled Li6MnSi5, based on the molar ratio among the Li/Mn/Si precursors, with promising electrochemical properties as positive electrode material is synthesized through a solid-state reaction. The results indicate the propo...
Article
The paper offers a contribution towards solving the problem of the fast capacity decay of pure aluminium anodes for lithium batteries. To this aim, an analysis of the compounds that form during the electrochemical reactions which occur during the working of the anode has been carried out. The phase transformations during lithium insertion and lithi...
Poster
Li/S batteries have attracted much attention in recent years due to their high theoretical capacity of 1672 mAhg −1 and low cost. The practical energy density of packaged Li-S batteries could be roughly 400 – 600 Whkg-1 and could satisfy a traveling distance of 500 km for electric vehicles. Many challenges such as low sulphur conductivity, shuttlin...
Article
Full-text available
Herein, we present binder-free O2 electrodes of mesoporous carbon nanofibres and Co nanoparticles (Co-doped CNF). Such electrodes are synthesized using electrospinning techniques coupled with subsequent thermal treatments. The fibre-based mats behave as free-standing electrodes due to the presence of 3D cross-linked web structures, and thus additio...
Conference Paper
Future of portables devices, electric vehicles and smart grids demands long life and high energy density batteries. Li/S batteries – a post Li ion technology – provide a sound answer to such requests, as they offer high theoretical capacity (1675 Ah kg-1) and high energy density (2500 Wh kg-1). The development of Li/S system faces several challen...
Article
Full-text available
Li-O2 battery research at a fundamental level remains critical, and nature of reactions and stability are paramount for realising the promise of the Li-O2 system. We report that ITO nanocrystals with supported 1-2 nm OER catalyst Ru/RuOx nanoparticles demonstrate efficient OER processes, significantly reducing the cell's recharge overpotential, and...
Article
Full-text available
In the lithium-oxygen (Li-O2) cell, the porous structure of the cathode is an important issue as well as challenge for its task of accommodating discharge products and providing free paths for oxygen. Clogging of pores and degradation of materials at the cathode affect the discharge rates and cycling performance of Li-O2 cell. Based on the study of...
Article
A novel oxygen selective highly hydrophobic membrane is prepared by non-solvent induced phase separation in which a dextrin-based nanosponge is incorporated into a poly(vinylidene fluoride co-hexafluoropropylene) (PVDF-HFP) matrix. The membrane presents high capability to entrap moisture from air as well as good hydrophobic behaviour. The membrane...
Conference Paper
Ion beam shaping is a novel technique with which one can shape nano-structures that are embedded in a matrix, while simultaneously imposing their orientation in space. In this work, we demonstrate that the ion-shaping technique can be implemented successfully to engineer the morphology of hollow metallic spherical particles embedded within a silica...
Article
LaSr-based perovskite materials are frequently studied as catalyst at the cathode of the lithium-air batteries (LAB). In this study, we compared Pb, Ba and Sr in the form of La0.65X0.35MnO3 (X = Pb, Ba, Sr) at the cathode of LAB in terms of total discharge capacity, cell cycling and discharge reaction products. The electrochemical characterization...
Poster
Full-text available
In the commercial Li-ion batteries production, the electrodes active materials slurries are prepared using polyvinylidene fluoride (PVdF) as binder, thanks to its good adhesion properties and electrochemical stability. Unfortunately there are some disadvantages related to the use of PVdF: most important the requirement of toxic and environmentally...
Article
In our daily life the demand for electrochemical power sources with high energy density is becoming increasingly important. This kind of resources is fundamental for our future as it may represent a viable alternative to fossil fuels and gases offering a solution to environmental issues as well as energy crises. Until now Lithium-ion batteries (LIB...
Article
The demand for high-energy storage systems is constantly increasing, as is the interest to explore alternatives to commercially available batteries. The rechargeable Li-air battery represents an exciting opportunity to design batteries that may satisfy some of the requirements of our future by coupling the light Li metal with the inexhaustible sour...
Article
Full-text available
Nonaqueous electrolyte Li–air batteries with an O2-selective membrane at the cathode are developed for operation in ambient air at constant relative humidity (RH). The membrane allows for oxygen permeation and acts as a moisture barrier. Our group prepared highly hydrophobic films of poly(vinylidene fluoride co-hexafluoropropylene) (PVDF-HFP) via n...
Article
Full-text available
Ion beam shaping is a novel technique with which one can shape nano-structures that are embedded in a matrix, while simultaneously imposing their orientation in space. In this work, we demonstrate that the ion-shaping technique can be implemented successfully to engineer the morphology of hollow metallic spherical particles embedded within a silica...
Article
Mesoporous carbon nanofibres doped with palladium nanoparticles (Pd CNFs) are synthesized by electrospinning with subsequent thermal treatment processes and used as electro-catalysts at the oxygen cathode of Li-O2 batteries. FESEM images show that the spherical Pd nanoparticles (NPs) are homogeneously dispersed on the surface of CNFs and X-ray diff...
Article
The present work mainly focuses on aprotic electrolytes in order to improve the performance of Li–O2 cells. The single-solvent electrolytes are based on tetraethylene glycol dimethyl ether (TEGDME), dimethyl sulfoxide (DMSO) and ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMITFSI), respectively. Compared to TEGDME an...
Article
Full-text available
We report a Novel type of WO3 nanostructure, i.e. nanorolls obtained as self-assembled thin film on a transparent conductive substrate. The mild conditions of preparation, avoiding the use of HCl, result in a eco-friendly hydrothermal method with reduced crystallization time. FESEM and HR-TEM show that WO3 nanocrystals are made of rolled nanoflakes...
Article
Lithium-oxygen (Li-O2) battery is considered as one of the most promising technologies among various electrochemical energy systems, since it can offer much higher theoretical energy density than the conventional lithium-ion battery. However, a high voltage gap between charge and discharge significantly limits the round-trip efficiency and cycle st...
Article
Three controlled/living polymerization processes, namely atom transfer radical polymerization (ATRP), ring-opening polymerization (ROP) and iniferter polymerization, and photoinduced radical coupling reaction were combined for the preparation of ABCBD-type H-shaped complex copolymer. First, α-benzophenone functional polystyrene (BP-PS) and poly(met...
Article
In this article, we described click chemistry methodology for the incorporation of biocompatible polymer chains to Magnetite nanoparticles (NPs). We used a reduction co-precipitation method to obtain Fe3O4 particles in aqueous solution. As a next step, magnetic NPs surface were modified by a silanization reaction with (3-bromopropyl)trimethoxysilan...
Article
Magnetite nanoparticles are synthesized and functionalized with vinyl groups (by silanization reaction with VTMS) and further coated with poly(ethylene glycol) dithiol under UV activation via thiol-ene addition. TEM analysis is in a good agreement with DLS analyses and shows that by vinyl functionalization and following PEG coating it was possible...
Article
A new, fast and convenient method for the preparation of gold–polyethylenglycol core–shell nanoparticles in water was described. The method pertains to the concomitant redox and polymerization reactions of the acrylic formulation induced by photochemically generated radicals from the photoinitiator, 2-hydroxy-2-methyl-1-phenyl-1-propanone. The nano...
Article
This paper reports a novel synthetic process to obtain poly(ethylene glycol)-coated magnetite nanoparticles. Magnetite nanoparticles were synthesized by a chemical co-precipitation of Fe2+ and Fe3+ ions under alkaline conditions, which were then coated with poly(ethylene glycol) diacrylate via UV-curing in water. The nanoparticles were characterize...

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Projects

Projects (3)
Project
The project is focused on the development innovative and scale-able positive and negative electrode materials and understanding the mechanisms to engineer them for market. This work is carrying out under European Union’s Horizon 2020 research and innovation program "ALISE - Advanced Lithium Sulphur battery for xEV" under grant agreement No 666157.
Project
The objective of eCAIMAN is to bring European expertise together to develop an automotive Li-Ion battery cell that can be produced in Europe. The consortium consists of several highly experienced industrial partners and research organizations. Together we will develop a more powerful battery by modifying and improving individual components and technologies to result in a significant overall improvement of the cell. Key innovations include a 5V high-voltage spinel, a high-capacity composite anode, and a stable high-voltage electrolyte. Their cumulative effect should improve total cell capacity by at least 20%. The project will also investigate the integration in light, passenger, and heavy duty vehicles. http://www.ecaiman.eu