Gil Goobes

Bar-Ilan University, Chemistry, Faculty Member

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Professor Gil Goobes completed his undergraduate studies in chemistry in Tel Aviv University in 1993. He received both his M.Sc. and Ph.D. from the department of Chemical Physics at the Weizmann Institute of Science working with Professor Shimon Vega. Through his graduate work he developed pulse techniques in solid state NMR for various applications.He held a post-doctoral fellowship at the University of Washington during the period 2002-2007 working with Professor Gary Drobny and Professor Patrick Stayton on deriving the molecular structure of proteins bound to tooth enamel surface, dynamics of DNA molecules and binding of peptides to gold nanoparticles.Since 2008 he is a member of the chemistry department faculty. His research interests are in fundamentally understanding heterogeneous biological systems and advanced materials.
Address: Israel

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Papers by Gil Goobes

A Novel Approach for Post-Mortem Analysis in All-Solid-State Batteries: Isolating Solid Polymer Electrolytes from Lithium Anodes

Journal of the Electrochemical Society, Feb 8, 2024

On Thermal Studies of Li-Ion Battery Materials

ECS Meeting Abstracts, 2010

not Available.

Ion Flux Regulation through PTFE Nanospheres Impregnated in Glass Fiber Separators for Long‐Lived Lithium and Sodium Metal Batteries

Advanced Energy Materials, May 2, 2023

Practical implementation of alkali metal batteries currently still faces formidable challenges be... more Practical implementation of alkali metal batteries currently still faces formidable challenges because of the dendrite growth upon continuous charge/discharge processes and the associated unstable solid–electrolyte interphase. Herein, it is reported that dendrites can be fundamentally mitigated in lithium and sodium metal batteries by regulating the Li+ and Na+ flux using a glass fiber (GF) separator impregnated with polytetrafluoroethylene nanospheres (PTFE‐NSs), which results in homogeneous deposition of Li and Na during charging. The COMSOL Multiphysics simulations reveal that the introduction of negatively charged PTFE‐NSs into the GF separator enhances the local electric field near the anode, thereby boosting the transfer of cations. It is demonstrated that Li//Li and Na//Na symmetric cells utilising a PTFE‐GF separator show outstanding cycle stability of 1245 and 2750 h, respectively, at 0.5 mA cm−2. Moreover, the Li//LiFePO4 and Na//Na3V2(PO4)2F3 full cells exhibit remarkably improved capacity retention when cycled at 1 C, in the presence of a PTFE‐GF separator. The nuclear magnetic resonance spectroscopy studies suggest that the impregnation of PTFE‐NSs into GF helps “liberate” more Li+ and Na+ and changes the coordination interaction between ions and solvents, contributing to the enhanced electrochemical performance.

Remembering Shimon Vega: Special issue on solid-state and DNP NMR

Solid State Nuclear Magnetic Resonance, Aug 1, 2023

Solvent Dependent Nuclear Magnetic Resonance Molecular Parameters Based on a Polarization Consistent Screened Range Separated Hybrid Density Functional Theory Framework

Journal of Chemical Theory and Computation

Polyoxometalates entrapped in sol–gel matrices for reducing electron exchange column applications

Journal of Coordination Chemistry, Oct 27, 2016

Electron exchange columns were developed by utilizing the redox properties of polyoxometalates (P... more Electron exchange columns were developed by utilizing the redox properties of polyoxometalates (POMs) entrapped in silica matrices via the sol-gel route. The properties of the columns strongly depend on the composition of the precursors used to prepare the matrices. The columns exhibit good reversibility and are the first 'reducing' electron exchange columns ever prepared. They are also the first columns where both the matrix and the entrapped redox agent are inorganic compounds. This increases their stability. However, the redox properties of the entrapped POMs in the matrices are affected by the composition of the matrices.

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Pushing the limit of layered transition metal oxide cathodes for high-energy density rechargeable Li ion batteries

Energy and Environmental Science, 2018

Lithium-ion batteries (LIBs) have become a dominant power source for portable electronic devices ... more Lithium-ion batteries (LIBs) have become a dominant power source for portable electronic devices and electric vehicles (EVs) and are the most promising energy-storage medium for smart power grids that use renewable energy sources. [1] Nickel rich Li[NixCoyMn1-x-y]O2 layered cathode materials (x > 0.6) are of interest because they can provide very high specific capacity without pushing charging potentials to levels that oxidize the electrolyte solutions. However, these Ni-enrichment strategies suffer from structural instability and subsequent capacity fading. In particular, abrupt anisotropic volume change stemming from multi-phase transition leads to develop the microcracks formation which propagated to the surface providing channels for electrolyte penetration and subsequent degradation of the exposed internal surfaces. [2] To simultaneously address the inherent limitations of capacity and safety, it is necessary to balance the physico-chemical role of each transition metal in a new microstructure design. An ideal approaches is the gradient Ni-rich Li[NixCoyMn1-x-y]O2 layered cathode material designed by maximizing the Ni content in the inner part of the particle and the Mn content near the particle surface. [3] This cathode material can deliver high capacity from the Ni-rich inner part and providing outstanding thermal properties from the Mn-rich outer surface. The enhanced cycling and chemical stability (relative to conventional Ni-rich NCM cathodes) were also attributed to the strong crystallographic texture, the unique particle morphology, and the highly correlated particle orientation. Alternatively, we investigated that tungsten (W) doped nickel rich Li[NixCoyMn1-x-y]O2 layered cathode materials remarkably improves their electrochemical and structural stability. The partial phase transition from layered phase to rock salt phase on particle surface buffers abrupt anisotropic volume change and protects active material from detrimental reactions with electrolyte. Through the advanced TEM techniques (HR-TEM and ASTAR analysis), segregation between rocksalt Fm3 ̅ m phase and a bulk R3 ̅ m phase on W-doped particle surface was crearly observed. This tungsten doped layered Li[NixCoyMn1-x-y]O2 cathode materials drastically improve their electrochemical behavior, impedance features and thermal stability compared to the un-doped nickel rich Li[NixCoyMn1-x-y]O2 layered cathodes.

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Peptides from diatoms and grasses harness phosphate ion binding to silica to help regulate biomaterial structure

Acta Biomaterialia, Aug 1, 2020

Many life forms generate intricate submicron biosilica structures with various important biologic... more Many life forms generate intricate submicron biosilica structures with various important biological functions. The formation of such structures, from the silicic acid in the waters and in the soil, is thought to be regulated by unique proteins with high repeats of specific amino acids and unusual sidechain modifications. Some silicifying proteins are characterized by high prevalence of basic amino acids in their primary structures. Lysine-rich domains are found, for instance, in diatom silaffin proteins and in the sorghum grass siliplant protein. These domains exhibit catalytic activity in silica chain condensation, owing to molecular interactions of the lysine amine groups with the forming mineral. The use of amine chemistry by two very remote organisms has motivated us to seek other molecular biosilicification processes that may be common to the two life forms. In diatom silaffins, domains rich in phosphoserine residues are thought to assist the assembly of silaffin molecules into an organic supra-structure which serves as a template for the silica to precipitate on. This mold, held by salt bridges between serine phosphates and lysine amines, dictates the shape of the silica particles formed. Yet, silica synthesized with the dephosphorylated silaffin in phosphate buffer showed similar morphology to the one prepared with the native protein, suggesting that a defined spatial arrangement of serine phosphates is not required to generate silica with the desired shape. Concurrently, free phosphates enhanced the activity of siliplant1 in silica formation. It is therefore beneficial to characterize the involvement of these anions as co-factors in regulated silicification by functional peptides from the two proteins and to understand whether they play similar molecular role in the mechanism of mineralization. Here we analyze the molecular interactions of free phosphate ions with silica and the silaffin peptide PL12 and separately with silica and siliplant1 peptide SLP1 in the two biomimetic silica products generated by the two peptides. MAS NMR measurements show that the phosphate ions interact with the peptides and at the same time may be forming bonds with the silica mineral. This bridging capability may add another avenue by which the structure of the silica material is influenced. A model for the molecular/ionic interactions at the bio-inorganic interface is described, which may have bearings for the role of phosphorylated residues beyond the function as intermolecular cross linkers or free phosphate ions as co-factors in regulation of silicification.

LiNi0.8Co0.15Al0.05O2 Cathode Material: New Insights via 7Li and 27Al Magic-Angle Spinning NMR Spectroscopy

Chemistry of Materials, Oct 18, 2016

Aluminum doped mixed metal oxides are popular positive electrode materials for Li-ion batteries. ... more Aluminum doped mixed metal oxides are popular positive electrode materials for Li-ion batteries. They are used extensively in many applications, yet their operation and limitations are not entirely understood. This work shows the advantage of using solid-state 7Li and 27Al NMR for monitoring the electrochemical properties of the doped nickel–cobalt oxide cathode material, LiNi0.8Co0.15Al0.05O2 (NCA), particularly during the first few charge/discharge cycles. The changes in the state of the material as lithium ions are intercalated and deintercalated during discharge and charge, respectively, are highlighted via the Li nuclei as a dynamic reporter and the Al nuclei as a static, material-embedded reporter. In particular, the NMR view of the cyclic change of Ni ions between paramagnetic and diamagnetic oxidation states is enhanced by monitoring both nuclei. Two protocols of cycling the NCA electrode are compared: one employing a smaller voltage window, cycled against graphite as anode, and one using a wider ...

Studies of Aluminum-Doped LiNi0.5Co0.2Mn0.3O2: Electrochemical Behavior, Aging, Structural Transformations, and Thermal Characteristics

Journal of The Electrochemical Society, 2015

Alumina thin coat on pre-charged soft carbon anode reduces electrolyte breakdown and maintains sodiation sites active in Na-ion battery – Insights from NMR measurements

Journal of Solid State Chemistry, Jun 1, 2021

Abstract Atomic deposition of a thin layer of alumina on amorphous carbon materials was recently ... more Abstract Atomic deposition of a thin layer of alumina on amorphous carbon materials was recently established to improve their electrochemical properties as anodes in sodium-ion batteries. It is shown that the highest performance for these materials can be achieved by pre-sodiation of the electrode before coating it. The basis for the enhanced performance is illuminated by 13C and 23Na MAS NMR analysis showing that this specific procedure diminishes parasitic reactions and preserves reversible access to active sodiation sites.

Molecular differences in collagen organization and in organic-inorganic interfacial structure of bones with and without osteocytes

Acta Biomaterialia, May 1, 2022

Bone is a fascinating biomaterial comprised mostly of type-I collagen fibers as an organic phase,... more Bone is a fascinating biomaterial comprised mostly of type-I collagen fibers as an organic phase, apatite as an inorganic phase, with water molecules residing at the interfaces between these phases. They are hierarchically organized with minor constituents such as non-collagenous proteins, citrate ions and glycosaminoglycans into a composite structure that is mechanically durable yet contains enough porosity to accommodate cells and blood vessels. The nanometer scale organization of the collagen fibrous structure and the mineral constituents in bone were recently extensively scrutinized. However, molecular details at the lowest hierarchical level still need to be unraveled to better understand the exact atomic-level arrangement of all these important components in the context of the integral structure of the bone. In this report, we unfold some of the molecular characteristics differentiating between two load-bearing (cleithrum) bones, one from sturgeon fish, where the matrix contains osteocytes and one from pike fish where the bone tissue is devoid of these bone cells. Using enhanced solid-state NMR measurements, we underpin disparities in the collagen fibril structure and dynamics, the mineral phases, the citrate content at the organic-inorganic interface and water penetrability in the two bones. These findings suggest that different strategies are undertaken in the erection of the mineral-organic interfaces in various bones characterized by dissimilar osteogenesis or remodeling pathways and may have implications to the mechanical properties of the particular bone. STATEMENT OF SIGNIFICANCE: Bone boasts unique interactions between collagen fibers and mineral phases through interfaces holding together this bio-composite structure. Over evolution, fish have gone from mineralizing their bones aided by certain bone cells called osteocytes, like tetrapod, to mineralization without these cells. Here, we report atomic level differences in collagen fiber cross linking and organization, porosity of the mineral phases and content of citrate molecules at the bio-mineral interface in bones from modern versus ancient fish. The dissimilar structural features may suggest disparate mechanical properties for the two bones. Fundamental level understanding of the organic and inorganic components in bone and the interfacial interactions holding them together is essential for successful bone repair and for treating better tissue pathologies.

Ammonia Treatment of 0.35Li2MnO3·0.65LiNi0.35Mn0.45Co0.20O2 Material: Insights from Solid-State NMR Analysis

Journal of Physical Chemistry C, Feb 8, 2018

Li-rich cathode materials of the formula xLi2MnO3·yLiNiaCobMncO2 (x + y = 1, a + b + c = 1) boast... more Li-rich cathode materials of the formula xLi2MnO3·yLiNiaCobMncO2 (x + y = 1, a + b + c = 1) boast very high discharge capacity, ca. 250 mAh/g. Yet, they suffer capacity decrease and average voltage fade during cycling in Li-ion batteries that prohibit their commercialization. Treatment of the materials with NH3(g) at high temperatures produces improved electrodes with higher stability of capacity and average voltage. The present study follows the changes occurring in the materials upon treatment with ammonia gas, through 6Li and 7Li solid-state NMR investigations of the untreated and ammonia treated 0.35Li2MnO3·0.65LiNi0.35Mn0.45Co0.20O2 as well as its constituent phases, Li2MnO3 and LiNi0.4Co0.2Mn0.4O2. The NMR analysis demonstrates the biphasic nature of these materials. Furthermore, it shows that the Li2MnO3 component phase in the integrated material is the phase mostly being affected by the gas treatment. A thickening of a protective surface film in the integrated material, with the right exposure tim...

Linking structure to performance of Li1.2Mn0.54Ni0.13Co0.13O2 (Li and Mn rich NMC) cathode materials synthesized by different methods

Physical Chemistry Chemical Physics, 2020

Solid state 6,7Li NMR can distinguish between nominally identical materials synthesized via diffe... more

Understanding the roles of functional peptides in designing apatite and silica nanomaterials biomimetically using NMR techniques

Current Opinion in Colloid and Interface Science, 2018

Biomaterials are still commonly fabricated using synthetic scaffolds and catalysts such as polyme... more Biomaterials are still commonly fabricated using synthetic scaffolds and catalysts such as polymers and surfactants. As contemporary requirements for cleaner and safer biomaterial manufacture rise, there will be a need to generate materials that are more akin to biogenic materials in the hard tissue of organisms. This can be achieved by employing biomolecules derived from organisms themselves. Specialized proteins and peptides, which act as tiny bioengineers in biological processes of mineral formation, can be utilized as biomimetic scaffolds and as reaction catalysts. The use of such molecules rather than synthetic polymers is a promising avenue for generating biodegradable green materials and ensuring the biosafety of medical materials such as dental and bone implants. We review here recent work from the group, on using peptides derived from mineralizing proteins to control the morphology of biomimetic apatite and silica and on characterizing their molecular level interfacial interactions with the inorganic materials formed using contemporary solid-state NMR experiments.

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Lysozyme is Sterically Trapped Within the Silica Cage in Bioinspired Silica–Lysozyme Composites: A Multi-Technique Understanding of Elusive Protein–Material Interactions

Langmuir, Jun 23, 2022

Cu2+-Induced Self-Assembly and Amyloid Formation of a Cyclic D,L-α-Peptide: Structure and Function

Physical Chemistry Chemical Physics, 2022

The self-assembly of the cyclic d,l-α-peptide generates amyloid-like structures and this process ... more

Engineering <scp>l</scp>-asparaginase for spontaneous formation of calcium phosphate bioinspired microreactors

Physical Chemistry Chemical Physics, 2018

Active bioinspired materials are appealing biotechnological targets, and their study is gaining m... more Active bioinspired materials are appealing biotechnological targets, and their study is gaining momentum. These materials, which comprise of an inorganic matrix and one or more biomolecules, are extremely variable and therefore may result difficult to characterize in their intimate structure. In this work we have prepared a hydroxyapatite-L-asparaginase composite, with the perspective of using it in acute leukemia treatment. We demonstrate that the use of electron microscopy and powder X-ray diffraction, combined with the atomic-resolution information coming from solid-state NMR, allows us to understand the topology of the material and how the different components interplay to obtain an active composite.

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The Structure of Bones Having or Lacking Osteocytes Exhibits Differences in Collagen Molecular Organization, Mineral Packing and the Organic-Inorganic Interfaces

Social Science Research Network, 2021