Dijo Damien - Academia.edu (original) (raw)

Papers by Dijo Damien

Research paper thumbnail of MoS<sub>2</sub> Quantum Dot-Interspersed Exfoliated MoS<sub>2</sub> Nanosheets

We report the synthesis of heterodimensional nanostructures of MoS<sub>2</sub> quantu... more We report the synthesis of heterodimensional nanostructures of MoS<sub>2</sub> quantum dots interspersed in few-layered sheets of MoS<sub>2</sub>, using a liquid exfoliation technique in organic solvents. This unique hybrid morphology results from the optimized experimental conditions involving bath sonication followed by ultrasound probe sonication. We show that such heterodimensional hybrid materials could easily be extracted from the solvent as precipitates when post-treated with less polar volatile solvents such as chloroform. Such tailored MoS<sub>2</sub> nanostructures, when directly used as electrodes for hydrogen evolution reaction, showed excellent electrocatalytic activity with low overpotential. Hence, we believe this could lead to large-scale synthesis of liquid-exfoliated layered nanostructures for their potential applications

Research paper thumbnail of Hybrid Halide Solid Electrolytes and Bottom-up Cell Assembly Enable High Voltage Solid-State Lithium Batteries

ECS Meeting Abstracts

Interface between halide based solid electrolytes and layered transition metal oxide cathodes has... more Interface between halide based solid electrolytes and layered transition metal oxide cathodes has been found to be electro-chemically stable due to stability of chloride compounds, in particular, at >4V range. The extent of interfacial stability is correlated with the type of cationic and anionic species in the solid electrolyte compound, a fact supported by theoretical prediction and yet, not accurately measured in composite cathode mixtures. By altering the architecture of cathode into a dense additive-free structure, we have identified differences in interfacial stability of chloride compounds which are hidden in composite cathode formats. In this work, we report the use of dense cathode to track the electrochemical evolution of interface between a hybrid halide solid electrolyte composed of chloride and fluoride species. Introducing fluoride compounds is known to be a promising method to expand the oxidation stability while the nature of such expansion is found to be related ...

Research paper thumbnail of γ-MnOOH-graphene nanocomposite as promising anode material for Li-ion capacitors

Journal of Energy Storage, 2022

Research paper thumbnail of A Safer, Wide-Temperature Liquefied Gas Electrolyte Based on Difluoromethane

Journal of Power Sources, 2021

Research paper thumbnail of Sodium-Ion Batteries: Twisted Perylene Diimides with Tunable Redox Properties for Organic Sodium-Ion Batteries (Adv. Energy Mater. 20/2017)

Advanced Energy Materials, Oct 1, 2017

Research paper thumbnail of Tailored Organic Electrode Materials for Sodium Ion Batteries

ECS Meeting Abstracts, 2016

Developing new strategies to improve the performance of organic-based sodium-ion batteries (SIBs)... more Developing new strategies to improve the performance of organic-based sodium-ion batteries (SIBs) has gained tremendous scientific interest in recent years. The design flexibility and resource renewability of organic electrode materials offer new avenues towards sustainable battery systems for better energy storage.[1] Towards the end of 20th century, the research on organic electrode materials for battery applications was much focused on capacity retention. Immobilization driven materials design has alleviated the poor capacity retention issues to a great extent in recent years.[2] However, organic materials have an inherent drawback of low reduction potential and consequent low discharge potential, which remains as a catastrophic block for its applications at the cathode side. 3,4,9,10-perylenetetracarboxylic (PTCDA), with a low lying LUMO and eight free bay and ortho positions for substitutions, is an ideal system to tailor a molecule with higher reduction potentials.[3] Polyimi...

Research paper thumbnail of Fluorinated Graphene-Based High Performance Electrodes for Primary Lithium Batteries

ECS Meeting Abstracts, 2014

Though rechargeable Li ion battery has become the dominant power source for portable electronics ... more Though rechargeable Li ion battery has become the dominant power source for portable electronics applications, primary batteries are used in applications like military and defense tools, medical implants, long time spatial exploratory missions, cameras etc.1 By virtue of the low molecular weight and high redox potential of the constituting elements, Li/CFx primary battery has clear dominance over any other competing primary battery technologies like Li/MnO2 or Li/SOCl2 in terms of its energy density, exceptionally long shelf life and a wide operating temperature window.2, 3 However, with its poor rate capability, owing to low electrical conductivity and diffusion limited kinetics, Li/CFx battery system is less preferred compared to other battery chemistry like MnO2 based systems.2 Different strategies have been developed specifically for improving energy density, power density and faradic yield of Li/CFx batteries.1 However, a single step strategy capable of improving all the electr...

Research paper thumbnail of Twisted Perylene Diimides with Tunable Redox Properties for Organic Sodium‐Ion Batteries

Advanced Energy Materials, 2017

Organic rechargeable batteries gain huge scientific interest owing to the design flexibility and ... more Organic rechargeable batteries gain huge scientific interest owing to the design flexibility and resource renewability of the active materials. However, the low reduction potentials still remain a challenge to compete with the inorganic cathodes. This study demonstrates a simple and efficient approach to tune the redox properties of perylene diimides (PDIs) as high voltage cathodes for organic‐based sodium‐ion batteries (SIBs). With appropriate electron‐withdrawing groups as substituents on perylene diimides, this study shows a remarkable tunability in the discharge potential from 2.1 to 2.6 V versus Na+/Na with a sodium intake of ≈1.6 ions per molecule. Further, this study explores tuning the shape of the voltage profiles by systematically tuning the dihedral angle in the perylene ring and demonstrates a single plateau discharge profile for tetrabromo‐substituted perylene diimide (dihedral angles θ1 & θ2 = 38°). Detailed structural analysis and electrochemical studies on substitute...

Research paper thumbnail of TiO2fibre/particle nanohybrids as efficient anodes for lithium-ion batteries

RSC Advances, 2016

Nanostructured TiO2with fiber/particle hybrid morphology, obtained by a simultaneous electrospinn... more Nanostructured TiO2with fiber/particle hybrid morphology, obtained by a simultaneous electrospinning and electrospraying technique, shows excellent electrochemical performance as efficient anodes for the Li-ion battery.

Research paper thumbnail of Supplementary Info to Electrochemical synthesis of luminescent MoS2 quantum dots

Research paper thumbnail of Supplementary Info

Research paper thumbnail of A Single step process for the synthesis of MoS2 quantum dots

Research paper thumbnail of Fluorinated graphene based electrodes for high performance primary lithium batteries

Research paper thumbnail of A polyimide based all-organic sodium ion battery

Journal of Materials Chemistry A, 2015

N,N′-diamino-3,4,9,10-perylenetetracarboxylic polyimide (PI) based materials show excellent elect... more N,N′-diamino-3,4,9,10-perylenetetracarboxylic polyimide (PI) based materials show excellent electrochemical performance as cathodes for sodium-ion batteries and an all-organic sodium ion battery using this polyimide as the cathode and disodium terephthalate (NaTP) (pre-sodiated) as the anode is demonstrated.

Research paper thumbnail of Eco-Efficient Synthesis of Graphene Nanoribbons and Its Application in Electrochemical Supercapacitors

Graphene, 2013

ABSTRACT We report a unique approach to synthesize graphene nanoribbons (GNRs) by aqueous LiTFSI ... more ABSTRACT We report a unique approach to synthesize graphene nanoribbons (GNRs) by aqueous LiTFSI (Lithium bis-trifluoromethylsulphonylimide)-assisted electrochemical exfoliation of graphite elec-trodes. The method, which utilizes an electrolyte whose major composition (99.9%) is water, is simple, cost effective and eco-efficient and more importantly does not use any organic solvents and high alkalinity of the electrolytes. The process results in the growth of GNRs with curved edge morphology, which prevents restacking of the exfoliated layers, thereby enhancing the effective sur-face area of GNRs. The morphology and structural properties of GNRs have been investigated by various analytical techniques such as Transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Fourier Transformed Infrared spectroscopy (FT-IR) and Raman spectroscopy. We demonstrate improved electrochemical performance of curved GNRs, compared to electrodes made of chemically reduced graphene oxide (RGO) grown using chemical oxidation-reduction pro-cess, when used as supercapacitor electrodes. GNRs materials show improved specific capacity of 140 F/g, and a high energy density of 78 Wh/kg, along with good cycling stability, implying their potential for energy storage applications.

Research paper thumbnail of Electrochemical synthesis of luminescent MoS2 quantum dots

Chemical Communications, 2015

Quantum dots of single-/few-layered MoS2 with tunable sizes, obtained through a unique electroche... more Quantum dots of single-/few-layered MoS2 with tunable sizes, obtained through a unique electrochemical exfoliation process, show excellent electrocatalytic activity towards hydrogen evolution reactions.

Research paper thumbnail of MoS2 Quantum Dot-Interspersed Exfoliated MoS2 Nanosheets

ACS Nano, 2014

We report the synthesis of heterodimensional nanostructures of MoS2 quantum dots interspersed in ... more We report the synthesis of heterodimensional nanostructures of MoS2 quantum dots interspersed in few-layered sheets of MoS2, using a liquid exfoliation technique in organic solvents. This unique hybrid morphology results from the optimized experimental conditions involving bath sonication followed by ultrasound probe sonication. We show that such heterodimensional hybrid materials could easily be extracted from the solvent as precipitates when post-treated with less polar volatile solvents such as chloroform. Such tailored MoS2 nanostructures, when directly used as electrodes for hydrogen evolution reaction, showed excellent electrocatalytic activity with low overpotential. Hence, we believe this could lead to large-scale synthesis of liquid-exfoliated layered nanostructures for their potential applications.

Research paper thumbnail of Perylene-polyimide-Based Organic Electrode Materials for Rechargeable Lithium Batteries

The Journal of Physical Chemistry Letters, 2013

Organic materials for Li-ion battery application continue gaining attention due the virtue of low... more Organic materials for Li-ion battery application continue gaining attention due the virtue of low cost, environmental benignity, and so on. A new class of electroactive organic material called polyimides is particularly important due to the extra stability exhibited at higher current rates. High-performance rechargeable lithium battery cathodes based on polyimides of 3,4,9,10perylenetetracarboxylicacid-dianhydride are prepared. The novel electrodes exhibit good rate capability and improved cycling stability, which result from their combined beneficial properties such as the presence of additional carbonyl groups, favorable band gap, and enhanced conductivity, making it a potential material for greener and sustainable electrochemical storage devices.

Research paper thumbnail of Direct deposition of MoSe2 nanocrystals onto conducting substrates: towards ultra-efficient electrocatalysts for hydrogen evolution

Journal of Materials Chemistry A, 2017

Monodisperse single/few-layered MoSe2 nanocrystals are directly deposited onto conducting substra... more Monodisperse single/few-layered MoSe2 nanocrystals are directly deposited onto conducting substrates, through electrochemical exfoliation of bulk MoSe2, which exhibit remarkable electrocatalytic activity for the hydrogen evolution reaction.

Research paper thumbnail of MoS<sub>2</sub> Quantum Dot-Interspersed Exfoliated MoS<sub>2</sub> Nanosheets

We report the synthesis of heterodimensional nanostructures of MoS<sub>2</sub> quantu... more We report the synthesis of heterodimensional nanostructures of MoS<sub>2</sub> quantum dots interspersed in few-layered sheets of MoS<sub>2</sub>, using a liquid exfoliation technique in organic solvents. This unique hybrid morphology results from the optimized experimental conditions involving bath sonication followed by ultrasound probe sonication. We show that such heterodimensional hybrid materials could easily be extracted from the solvent as precipitates when post-treated with less polar volatile solvents such as chloroform. Such tailored MoS<sub>2</sub> nanostructures, when directly used as electrodes for hydrogen evolution reaction, showed excellent electrocatalytic activity with low overpotential. Hence, we believe this could lead to large-scale synthesis of liquid-exfoliated layered nanostructures for their potential applications

Research paper thumbnail of Hybrid Halide Solid Electrolytes and Bottom-up Cell Assembly Enable High Voltage Solid-State Lithium Batteries

ECS Meeting Abstracts

Interface between halide based solid electrolytes and layered transition metal oxide cathodes has... more Interface between halide based solid electrolytes and layered transition metal oxide cathodes has been found to be electro-chemically stable due to stability of chloride compounds, in particular, at >4V range. The extent of interfacial stability is correlated with the type of cationic and anionic species in the solid electrolyte compound, a fact supported by theoretical prediction and yet, not accurately measured in composite cathode mixtures. By altering the architecture of cathode into a dense additive-free structure, we have identified differences in interfacial stability of chloride compounds which are hidden in composite cathode formats. In this work, we report the use of dense cathode to track the electrochemical evolution of interface between a hybrid halide solid electrolyte composed of chloride and fluoride species. Introducing fluoride compounds is known to be a promising method to expand the oxidation stability while the nature of such expansion is found to be related ...

Research paper thumbnail of γ-MnOOH-graphene nanocomposite as promising anode material for Li-ion capacitors

Journal of Energy Storage, 2022

Research paper thumbnail of A Safer, Wide-Temperature Liquefied Gas Electrolyte Based on Difluoromethane

Journal of Power Sources, 2021

Research paper thumbnail of Sodium-Ion Batteries: Twisted Perylene Diimides with Tunable Redox Properties for Organic Sodium-Ion Batteries (Adv. Energy Mater. 20/2017)

Advanced Energy Materials, Oct 1, 2017

Research paper thumbnail of Tailored Organic Electrode Materials for Sodium Ion Batteries

ECS Meeting Abstracts, 2016

Developing new strategies to improve the performance of organic-based sodium-ion batteries (SIBs)... more Developing new strategies to improve the performance of organic-based sodium-ion batteries (SIBs) has gained tremendous scientific interest in recent years. The design flexibility and resource renewability of organic electrode materials offer new avenues towards sustainable battery systems for better energy storage.[1] Towards the end of 20th century, the research on organic electrode materials for battery applications was much focused on capacity retention. Immobilization driven materials design has alleviated the poor capacity retention issues to a great extent in recent years.[2] However, organic materials have an inherent drawback of low reduction potential and consequent low discharge potential, which remains as a catastrophic block for its applications at the cathode side. 3,4,9,10-perylenetetracarboxylic (PTCDA), with a low lying LUMO and eight free bay and ortho positions for substitutions, is an ideal system to tailor a molecule with higher reduction potentials.[3] Polyimi...

Research paper thumbnail of Fluorinated Graphene-Based High Performance Electrodes for Primary Lithium Batteries

ECS Meeting Abstracts, 2014

Though rechargeable Li ion battery has become the dominant power source for portable electronics ... more Though rechargeable Li ion battery has become the dominant power source for portable electronics applications, primary batteries are used in applications like military and defense tools, medical implants, long time spatial exploratory missions, cameras etc.1 By virtue of the low molecular weight and high redox potential of the constituting elements, Li/CFx primary battery has clear dominance over any other competing primary battery technologies like Li/MnO2 or Li/SOCl2 in terms of its energy density, exceptionally long shelf life and a wide operating temperature window.2, 3 However, with its poor rate capability, owing to low electrical conductivity and diffusion limited kinetics, Li/CFx battery system is less preferred compared to other battery chemistry like MnO2 based systems.2 Different strategies have been developed specifically for improving energy density, power density and faradic yield of Li/CFx batteries.1 However, a single step strategy capable of improving all the electr...

Research paper thumbnail of Twisted Perylene Diimides with Tunable Redox Properties for Organic Sodium‐Ion Batteries

Advanced Energy Materials, 2017

Organic rechargeable batteries gain huge scientific interest owing to the design flexibility and ... more Organic rechargeable batteries gain huge scientific interest owing to the design flexibility and resource renewability of the active materials. However, the low reduction potentials still remain a challenge to compete with the inorganic cathodes. This study demonstrates a simple and efficient approach to tune the redox properties of perylene diimides (PDIs) as high voltage cathodes for organic‐based sodium‐ion batteries (SIBs). With appropriate electron‐withdrawing groups as substituents on perylene diimides, this study shows a remarkable tunability in the discharge potential from 2.1 to 2.6 V versus Na+/Na with a sodium intake of ≈1.6 ions per molecule. Further, this study explores tuning the shape of the voltage profiles by systematically tuning the dihedral angle in the perylene ring and demonstrates a single plateau discharge profile for tetrabromo‐substituted perylene diimide (dihedral angles θ1 & θ2 = 38°). Detailed structural analysis and electrochemical studies on substitute...

Research paper thumbnail of TiO2fibre/particle nanohybrids as efficient anodes for lithium-ion batteries

RSC Advances, 2016

Nanostructured TiO2with fiber/particle hybrid morphology, obtained by a simultaneous electrospinn... more Nanostructured TiO2with fiber/particle hybrid morphology, obtained by a simultaneous electrospinning and electrospraying technique, shows excellent electrochemical performance as efficient anodes for the Li-ion battery.

Research paper thumbnail of Supplementary Info to Electrochemical synthesis of luminescent MoS2 quantum dots

Research paper thumbnail of Supplementary Info

Research paper thumbnail of A Single step process for the synthesis of MoS2 quantum dots

Research paper thumbnail of Fluorinated graphene based electrodes for high performance primary lithium batteries

Research paper thumbnail of A polyimide based all-organic sodium ion battery

Journal of Materials Chemistry A, 2015

N,N′-diamino-3,4,9,10-perylenetetracarboxylic polyimide (PI) based materials show excellent elect... more N,N′-diamino-3,4,9,10-perylenetetracarboxylic polyimide (PI) based materials show excellent electrochemical performance as cathodes for sodium-ion batteries and an all-organic sodium ion battery using this polyimide as the cathode and disodium terephthalate (NaTP) (pre-sodiated) as the anode is demonstrated.

Research paper thumbnail of Eco-Efficient Synthesis of Graphene Nanoribbons and Its Application in Electrochemical Supercapacitors

Graphene, 2013

ABSTRACT We report a unique approach to synthesize graphene nanoribbons (GNRs) by aqueous LiTFSI ... more ABSTRACT We report a unique approach to synthesize graphene nanoribbons (GNRs) by aqueous LiTFSI (Lithium bis-trifluoromethylsulphonylimide)-assisted electrochemical exfoliation of graphite elec-trodes. The method, which utilizes an electrolyte whose major composition (99.9%) is water, is simple, cost effective and eco-efficient and more importantly does not use any organic solvents and high alkalinity of the electrolytes. The process results in the growth of GNRs with curved edge morphology, which prevents restacking of the exfoliated layers, thereby enhancing the effective sur-face area of GNRs. The morphology and structural properties of GNRs have been investigated by various analytical techniques such as Transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Fourier Transformed Infrared spectroscopy (FT-IR) and Raman spectroscopy. We demonstrate improved electrochemical performance of curved GNRs, compared to electrodes made of chemically reduced graphene oxide (RGO) grown using chemical oxidation-reduction pro-cess, when used as supercapacitor electrodes. GNRs materials show improved specific capacity of 140 F/g, and a high energy density of 78 Wh/kg, along with good cycling stability, implying their potential for energy storage applications.

Research paper thumbnail of Electrochemical synthesis of luminescent MoS2 quantum dots

Chemical Communications, 2015

Quantum dots of single-/few-layered MoS2 with tunable sizes, obtained through a unique electroche... more Quantum dots of single-/few-layered MoS2 with tunable sizes, obtained through a unique electrochemical exfoliation process, show excellent electrocatalytic activity towards hydrogen evolution reactions.

Research paper thumbnail of MoS2 Quantum Dot-Interspersed Exfoliated MoS2 Nanosheets

ACS Nano, 2014

We report the synthesis of heterodimensional nanostructures of MoS2 quantum dots interspersed in ... more We report the synthesis of heterodimensional nanostructures of MoS2 quantum dots interspersed in few-layered sheets of MoS2, using a liquid exfoliation technique in organic solvents. This unique hybrid morphology results from the optimized experimental conditions involving bath sonication followed by ultrasound probe sonication. We show that such heterodimensional hybrid materials could easily be extracted from the solvent as precipitates when post-treated with less polar volatile solvents such as chloroform. Such tailored MoS2 nanostructures, when directly used as electrodes for hydrogen evolution reaction, showed excellent electrocatalytic activity with low overpotential. Hence, we believe this could lead to large-scale synthesis of liquid-exfoliated layered nanostructures for their potential applications.

Research paper thumbnail of Perylene-polyimide-Based Organic Electrode Materials for Rechargeable Lithium Batteries

The Journal of Physical Chemistry Letters, 2013

Organic materials for Li-ion battery application continue gaining attention due the virtue of low... more Organic materials for Li-ion battery application continue gaining attention due the virtue of low cost, environmental benignity, and so on. A new class of electroactive organic material called polyimides is particularly important due to the extra stability exhibited at higher current rates. High-performance rechargeable lithium battery cathodes based on polyimides of 3,4,9,10perylenetetracarboxylicacid-dianhydride are prepared. The novel electrodes exhibit good rate capability and improved cycling stability, which result from their combined beneficial properties such as the presence of additional carbonyl groups, favorable band gap, and enhanced conductivity, making it a potential material for greener and sustainable electrochemical storage devices.

Research paper thumbnail of Direct deposition of MoSe2 nanocrystals onto conducting substrates: towards ultra-efficient electrocatalysts for hydrogen evolution

Journal of Materials Chemistry A, 2017

Monodisperse single/few-layered MoSe2 nanocrystals are directly deposited onto conducting substra... more Monodisperse single/few-layered MoSe2 nanocrystals are directly deposited onto conducting substrates, through electrochemical exfoliation of bulk MoSe2, which exhibit remarkable electrocatalytic activity for the hydrogen evolution reaction.