S Chandra Sekhar

S Chandra Sekhar
University of Limerick | UL · Department of Chemical Sciences

PhD

About

52
Publications
4,078
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
1,845
Citations

Publications

Publications (52)
Article
Metal hydroxides/sulfides have been attracting great interest from researchers in the energy storage-related fields due to their versatile electrochemical characteristics. Moreover, the synthesis of such a combination of materials is a challenging task. Herein, nickel-copper (NiCu) hydroxides with nanowire morphology was in situ prepared over the c...
Article
Full-text available
Evolving cost‐effective transition metal phosphides (TMPs) using general approaches for energy storage is pivotal but challenging. Besides, the absence of noble metals and high electrocatalytic activity of TMPs allow their applicability as catalysts in oxygen evolution reaction (OER). Herein, CoNiP‒CoP2 (CNP‒CP) composite is in situ deposited on ca...
Article
Currently, bimetallic selenates have attracted much attention as a prominent electrode composite material for supercapacitors owing to their higher redox chemistry and superior electrical conductivity. Herein, we synthesized cobalt-magnesium selenates (CoSeO3−MgSeO4, CMS) via a facile hydrothermal process, followed by selenization. At first, cobalt...
Chapter
Full-text available
Active materials are the core components of energy storage devices, which usually determine the potential window and capacity. Among the developed active materials, transition metal oxides (TMOs) have been fascinated as electrode candidates in supercapacitors (SCs) due to their high theoretical capacity, excellent redox chemistry, multivalence stat...
Article
Recently, incorporating nitrogen (N) and/or carbon (C) elements into the metal oxide matrix has been considered a promising strategy to enhance the electrochemical performance of supercapacitors (SCs) as they improve the wettability and conductivity properties. Herein, we synthesized N- and C-rich core-shell-like nickel oxide-nickel carbide (N/C-Ni...
Article
Full-text available
An ion‐exchange process is a promising approach to design advanced electrode materials for high‐performance energy storage devices. Herein, a nanostructured Ni3Sn2S2‐CoS (NSS‐CS) composite is fabricated by successive hydrothermal and ion‐exchange processes. Since the incorporation of redox‐rich cobalt element enables the NSS‐CS composite to be more...
Article
Transition metal molybdates and phosphates are prominent electroactive materials for energy storage systems due to their high theoretical capacity, multiple valence states, good electrical conductivity, and natural abundance. Herein, we report in-situ grown high redox-active copper-nickel molybdates (CuNiMo) on copper foam (CF) via a one-pot solvot...
Article
Full-text available
Transition bimetallic sulfides are exploited as high‐capacity electrode materials in energy storage devices owing to their abundant electroactive sites and relatively high electrical conductivity compared with metal oxides. Here, an in situ conversion of metal ions into NiS2–CoMo2S4 vertically aligned nanorod arrays on nickel foam (NS–CMS NRAs@NF)...
Article
Full-text available
The nanoscale morphology and mesoporosity have a substantial effect on the energy storage properties because it offers a high surface area and porous nature. The former one bestows the accessibility of more redox-active sites, while the latter facilitates the easy entry of foreign atoms. In this report, we rationally synthesized the mesoporous NiO-...
Article
Recently, bimetallic oxides with nanoscale morphology have emerged as promising and reliable electrode candidates for supercapacitors. Herein, we synthesized MnCo2O4 nanoparticles (NPs) (≤ 100 nm) via a facile one-step solvothermal method without further calcination. Thanks to the multi-valence states of manganese and cobalt elements as well as the...
Article
Ternary layered double hydroxide (LDH)-based active materials can serve as potential electrode materials in the development of high-performance supercapacitors (SCs) due to their good structural features and high electrochemical activity. This article describes the rational design of conductive nano-silver (Ag) particles integrated hierarchical nic...
Article
Fabrication of binder‐free electrode materials with vertical nanoarchitecture is the prominent approach to achieve exalted energy storage performance. Herein, we synthesized NiCo2O4 (NCO) zigzag‐patterned vertical nanosheet arrays (ZNSAs) directly over the nickel foam substrate by adopting a facile one‐step solvothermal method, which is followed by...
Article
The tin oxide nanoparticles (SnO2-NPs) were successfully synthesized on the conductive carbon cloth (CC) using a simple one-step solvothermal method to form three-dimensional (3D) porous SnO2/CC composite. The SnO2-NPs were uniformly deposited on CC and fine pores existed between the SnO2-NPs. The synthesized 3D porous SnO2/CC composite was investi...
Article
Mixed-metallic oxyphosphides and oxysulfides are prominent electrode candidates for energy storage devices owing to the synergistic benefits of metal oxides and metal sulfides. Herein, we explore nickel-molybdenum oxyphosphides and oxysulfides (NMOP/NMOS) by a one-step hydrothermal technique, followed by an anion exchange process. As a result, the...
Article
Rational design of light weight, flexible and werable yarn-type electrodes with selectively designed battery-type materials directs a promising research interest for the development of next-generation miniatured energy storage devices. However, the relatively lower energy storage performance ascribed by poor mass loading of existing fiber/yarn-base...
Article
Designing porous multi‐nanoarchitectures can be advantageous to reduce the ion impregnation and enhance the electrokinetics in the active materials of electrochemical energy storage devices. Herein, the nickel cobaltite (NiCo2O4) hybrid nanoarchitecture (NCO HNA) is prepared by using a facile wet‐chemical method, followed by calcination. The effect...
Article
In-situ growth of hybrid nanostructures composed of hollow transition metal chalcogenides has attracted increasing attention for the fabrication of high-performance hybrid supercapacitors (HSCs). Herein, we report the binder-free design of hierarchical ternary Cu(Co-Ni)2S4 nanotubes on nickel foam (Cu(Co-Ni)2S4 NTs/Ni foam) using synchronous etchin...
Article
Full-text available
Metal–organic frameworks (MOFs) are promising materials in diverse fields because of their constructive traits of varied structural topologies, high porosity, and high surface area. MOFs are also an ideal precursor/template to derive porous and functional morphologies. Herein, Co3V2O8 nanohexagonal prisms are grafted on CuV2O6 nanorod arrays (CuV‐C...
Article
Full-text available
Designing rationally combined metal–organic frameworks (MOFs) with multifunctional nanogeometries is of significant research interest to enable the electrochemical properties in advanced energy storage devices. Herein, we explored a new class of binder-free dual-layered Ni–Co–Mn-based MOFs (NCM-based MOFs) with three-dimensional (3D)-on-2D nanoarch...
Article
Recently, multifunctional and highly porous transition metal oxide-based anode materials have attracted incessant attention in enabling the high capacity and stability for lithium-ion battery (LIB) applications. Herein, an ingenious and facile approach has been developed to prepare three-dimensional (3D) porous and spindle-like α-Fe2O3 nanostructur...
Article
Herein, we report submicron-sized flower-like iron selenide (FeSe2, FS) nanostructure facilely prepared using a KCl-templated solvothermal technique followed by calcination treatment under an inert atmosphere. As an anode material in lithium ion batteries (LIBs), the as-prepared flower-like FS nanostructure exhibits a specific discharge/charge capa...
Article
In recent years, a substantial advancement in flexible and wearable consumer electronics has expedited the research community to develop flexible, lightweight, and sophisticated energy storage systems via cost-effective and safe preparation methods. In this context, we propose a state-of-the-art hot-water therapy (HWT) method to trigger nickel-copp...
Article
Full-text available
Rational design of anode materials comprising rich benefits of high capacity, superior rate capability and exalted lifetime is of considerable significance in the development of high-performance Li-ion batteries (LIBs) and supercapatteries. Herein, highly porous cobalt vanadate (Co2VO4) nanospheres encapsulated reduced graphene oxide (rGO) nanoshee...
Article
Highly porous hollow/core-shell nanostructures with controlled shapes and sizes have fascinated great importance in the development of high-performance energy storage devices. The well-controlled porous nanostructures with larger surface area could provide better electrochemical behavior owing to rapid diffusion of electrolyte ions into their inter...
Article
Engineering novel hierarchical nanostructure-based electrode materials with higher surface area remains a great challenge in energy storage field to achieve higher energy density hybrid supercapacitor for portable electronic applications. Herein, rational design of mono or mixed/bimetallic Co3O4, ZnCo2O4 and Ni ions incorporated ZnCo2O4 (Ni0·05Zn0·...
Article
Transition metal molybdates have attracted considerable devotion as a promising electrode material for energy storage devices owing to their enriched redox activity, good electronic conductivity, and stable crystal structure. Herein, we prepared the nickel molybdate (NiMoO4) nanohybrid composite on nickel (Ni) foam using a one-step hydrothermal met...
Article
Development of porous transition metal oxide nanostructures and their conductive compounds has attracted widespread attention in hybrid supercapacitors (SCs) because of their large surface area, mesoporosity and good electrochemical activity which significantly enhance the energy storage performance. Herein, we reported highly porous cerium oxide h...
Article
Designing binder-free and core-shell-like electrode materials with synergistic effects have attracted widespread attention for the development of high-energy density hybrid supercapacitors (HSCs). Herein, binder-free cobalt molybdate nanosheets laminated cobalt phosphate micropetals on nickel foam (CoM [email protected]/NF) were facilely prepared f...
Article
The growing surge in demand for sustainable energy and wide reaching of dumping culture has collectively promoted researchers to develop waste-to-wealth concepts for eco-benign energy storage devices. By taking inspiration from agriculture cultivating strategy, the discarded cardboards (CBs) are favorably transferred into highly flexible, economica...
Article
Construction of porous form of 3D flower-like nanoarchitectures with controlled morphologies has drawn a considerable interest by scientists in energy storage research field owing to their distinct structural features. Herein, we synthesize 3D flower-like NiMn2O4 nanoarchitectures by an eco-friendly silicon-oil bath strategy via ethylene glycol as...
Article
Transition metal oxide/hydroxide with multifunctional hierarchical nanostructures has attracted widespread attention in supercapacitors (SCs) because of their large accessible surface area, high electrochemical activity and superior redox chemistry. Herein, core-shell-like copper (Cu) hydroxide nanotube arrays grafted nickel aluminum layered double...
Article
Free-standing binder-free electrodes have attracted significant attention towards high-performance lithium (Li)-ion batteries (LIBs). In this study, the Fe2O3 nanostructures with various morphologies were prepared by a simple one-step solvothermal method. The as-prepared nanostructured Fe2O3 was successfully grown on carbon cloth (CC) to form the f...
Article
Full-text available
Designing multifunctional and core-shell-like architectures has attracted significant research interest in the enhancement of energy density in supercapatteries owing to their synergistic features of efficient accessibility of ions and high electrochemical activity. In the present work, we facilely synthesized the nickel hydroxide nanolayer decorat...
Article
Self‐powered charging systems in conjunction with renewable energy conversion and storage devices have attracted promising attention in recent years. In this work, a prolific approach to design a wind/solar‐powered rechargeable high‐energy density pouch‐type hybrid supercapacitor (HSC) is proposed. The pouch‐type HSC is fabricated by engineering na...
Article
Recently, porous structured electrode materials with high electrochemical activity and redox chemistry are very attractive for the development of high-performance electrochemical supercapacitors. The porous Ni2V2O7 microsphere-chains (NV MCs) were successfully prepared in a one-pot synthesis via a facile propanetriol (PT)-assisted hydrothermal tech...
Article
A facile, robust and cost-effective co-precipitation method was employed to develop NiCo2O4 (NCO) hexagonal nanostructures for effective positive electrode in asymmetric supercapacitors. With an inclusion of alkali ions in growth solution, the nickel and cobalt ions were homogeneously precipitated and nucleated in the form of hexagonal-shaped NCO w...
Article
Recently, battery-type electrode materials, such as transition metal oxides/molybdates, have attracted extensive attention in the development of high-performance supercapacitors (SCs), owing to their rich redox chemistry, high theoretical capacity and superior electrochemical activity. Herein, we prepared battery-type redox behavior-enabled tricopp...
Article
We facilely prepared silver nanoparticles-decorated Ce6Mo10O39 marigold flower-like structures (Ag NPs@CM MFs) for use as an effective positive material in hybrid supercapacitors (HSCs). With an aid of ethylenediaminetetracetic acid (EDTA) as a chelating agent, the self-assembled CM MFs were synthesized by a single-step hydrothermal method. When th...
Article
The electrode materials with large surface area and high porosity are predominant to enable the energy storage properties of electrochemical supercapacitors. Herein, lab-waste tissue paper templated trimanganese tetroxide hollow microtubes (Mn3O4 HMTs) with high porosity on their walls were synthesized via a facile biomorphic method. Initially, aqu...
Article
Herein, we develop a binder-free copper molybdate nanocone array with a prism-like morphology on nickel foam (Cu3Mo2O9 NCAs/Ni foam) using a single-step hydrothermal method. With an optimal growth time (10 h) under hydrothermal conditions, the prism-like Cu3Mo2O9 NCAs are uniformly decorated on Ni foam with good adhesion and crystallinity. The prep...
Article
Evolution of a simple, efficient and reproducible strategy for the rational design of hierarchically structured metal chalcogenide-based supercapacitors has attracted considerable research interest in recent years. Herein, a facile wet-chemistry approach is employed to design three-dimensional forest-like porous nickel sulfide nanotrees on nickel f...
Article
An essential key to enhance the redox chemistry of battery-type materials is to construct rational design of nanoarchitectures with high electrochemical activity. Herein, we reported a hierarchical composite consisting of bilayered nickel hydroxide carbonate nanoplates-decorated nanoflowers on nickel foam (NHC [email protected]/Ni foam) via a facil...
Article
The core-shell-like architectures consisting of NiO nanosheet arrays grafted Co3O4-NiO fish thorns-like nanostructures (NiO [email protected]3O4-NiO FTNs) were successfully prepared by a simple solution-based method. With an aid of ammonium fluoride (NH4F), the morphological evolution of Co3O4-NiO FTNs was elaborated effectively. Subsequently, the...
Article
Utilizing carbon-based counter electrodes (CEs) in dye-sensitized solar cells (DSSCs) have received much attention in recent times, owing to their low cost, good electrochemical activity, natural abundance and eco-friendly nature. Herein, we have facilely prepared quince leaves derived porous carbon (QLPC) using fallen quince leaves (QLs) and it wa...
Article
Porous and ant-cave structured MnCO3/Mn3O4 microcubes (MCs) were facilely synthesized via a biopolymer-assisted hydrothermal approach. Herein, chitosan was used as a natural biopolymer, which greatly controls the surface morphology and size of the prepared composite. The amino and hydroxyl group-functionalized chitosan engraves the outer surface of...
Article
In this work, we report a flexible battery-type electrode based on binder-free nickel cobalt layered double hydroxide nanosheets adhered to nickel cobalt layered double hydroxides nanoflake arrays on nickel fabric (NC LDHs NFAs@NSs/Ni fabric) using a facile and eco-friendly synthesis methods. Herein, we utilized discarded polyester fabric as a cost...
Article
In recent years, electronic waste (e-waste) such as old cable wires, fans, circuit boards, etc., can be often seen in large piles of leftover in dumping yards. Employing these e-waste sources for energy storage devices not only increases the economic value but also decreases the reliance on fossil fuels. In this context, waste cable wires are utili...
Article
Recently, yolk-shell structured electrode materials have attracted increasing interest in supercapacitors (SCs), due to their high surface area, good electrochemical activity, and excellent mechanical stability towards superior energy storage performance. However, the synthesis strategies to prepare such yolk-shell structured materials without usin...
Article
Silver nanowires (Ag NWs) have attracted particular interest in the development of various electronic and energy storage devices due to their one-dimensional structure, good conductivity, fast charge transportation and direct contact to the current collector. Herein, we have successfully deposited the binder-free nickel-cobalt layered double hydrox...
Article
Full-text available
Hierarchical copper oxide (CuO) nanostructures (NSs) with caterpillar-like morphologies were facilely integrated onto a highly flexible conductive woven textile substrate (CWTs) by a drop-casting approach. Initially, the CuO NSs were synthesized via a simple and green wet-chemical method in 30 min and the obtained colloidal solution of CuO was easi...
Article
Manganese dioxide nanosheet arrays with interconnected arrangements are easily synthesized on vapor grown carbon fibers (MnO2 NSAs@VCFs) by a simple wet-chemical method at low temperature. The conductive nature of the VCFs serves as a scaffold and easily reduces potassium permanganate species for the formation of hierarchical MnO2 NSAs@VCFs. When u...
Article
Highly flexible and conductive fabric (CF)-supported cauliflower-like nickel selenide nanostructures (Ni3Se2 NSs) are facilely synthesized by a single-step chronoamperometry voltage-assisted electrochemical deposition (ECD) method and used as a positive electrode in supercapacitors (SCs). The CF substrate composed of multi-layered metallic films on...

Network

Cited By