Article
Chemistry, Multidisciplinary
Tholkappiyan Ramachandran, Fathalla Hamed, Ramesh Kumar Raji, Sanjit Manohar Majhi, Debabrata Barik, Yedluri Anil Kumar, Ro. Mu. Jauhar, M. P. Pachamuthu, L. Vijayalakshmi, Sabah Ansar
Summary: Spinel metal oxide with an extra crystalline phase has been synthesized and studied for its potential application in supercapacitors. The material, nanocrystalline NiCo2O4 with an extra NiO phase, exhibited a remarkable electrochemical performance, with high capacitance and good capacity retention over 5000 cycles. The presence of the NiO phase induced additional charge at the boundary, leading to synergistic effects and improved electron and ion passage. This finding suggests that spinel metal oxide electrodes with an extra phase could be beneficial for battery-type supercapacitor applications.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
M. A. Yewale, R. A. Kadam, N. K. Kaushik, J. R. Koduru, N. B. Velhal, Umesh T. Nakate, A. A. Jadhavar, N. D. Sali, D. K. Shin
Summary: This study synthesized interconnected and porous microstructured NiCo2O4 material via a hydrothermal method and characterized its structure and electrochemical properties. The NiCo2O4 material exhibited a polycrystalline structure, interconnected plate-like microstructures, and high specific capacitance. It shows great potential for energy storage applications.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Chemistry, Applied
Ambar Ghadage, Pavan Kodam, Digambar Nadargi, K. P. Shinde, Imtiaz Mulla, J. S. Park, Sharad Suryavanshi
Summary: We report the development of highly optimized NiCo2O4 microflowers for supercapacitor applications. By carefully tuning various parameters, such as reaction temperature, reaction time, sintering temperature, and electrolyte concentration, we obtained an electrode material with high specific capacitance, energy density, and power density. The optimized sample displayed excellent electrochemical performance and retained 97.61% of its specific capacitance after 1000 cycles. The well-optimized NiCo2O4 microflowers show great promise for future industrial applications.
JOURNAL OF POROUS MATERIALS
(2022)
Article
Chemistry, Physical
O. C. Pore, A. V. Fulari, C. D. Chavare, D. S. Sawant, S. S. Patil, R. V. Shejwal, V. J. Fulari, G. M. Lohar
Summary: NiCo2O4 microflowers were prepared via hydrothermal method and the effect of precursor concentration on morphology and supercapacitor performance was investigated. XRD, FTIR, and XPS analysis confirmed the formation of NiCo2O4. FE-SEM observation showed the formation of microflower-like morphology. The optimized NiCo2O4 electrode with a molar ratio of Ni:Co = 1:2 exhibited a specific surface area of 147.3 m2 g-1. The supercapacitor study revealed that it achieved a maximum specific capacitance of 747.4 F g-1 at 5 mV s-1, with the highest energy density of 9.27 Wh kg-1 (@55.55 W kg-1) and 82.32% capacity retention over 5000 cycles.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
R. Dhilip Kumar, S. Nagarani, S. Balachandran, Chidambaram Brundha, S. Hari Kumar, R. Manigandan, Mohanraj Kumar, V. Sethuraman, Soo Hyung Kim
Summary: Significant progress has been made in the research on environmentally friendly energy conversion and storage technologies. Hexagonal-shaped ZnO nanopowders prepared by a hydrothermal method exhibited pseudo-capacitance behavior. The pseudo-capacitance of electrodes coated with crystalline ZnO nanopowders was investigated using various electrochemical techniques. The ZnO modified electrode achieved the highest specific capacitance of 448 F/g at 0.25 A/g in 2 M KOH. Furthermore, the stability of the ZnO modified electrode was significantly better than other prepared electrodes, making it a promising candidate for energy storage devices. The assembly of ZnO@NF//AC@NF as an asymmetric supercapacitor also demonstrated excellent capacitance retention over 5000 cycles.
SURFACES AND INTERFACES
(2022)
Article
Energy & Fuels
Manpreet Kaur, Prakash Chand, Hardeep Anand
Summary: The present study demonstrates a binder-free electrodeposition technique to produce NiCo(2)O(4) electrodes, which exhibit high specific capacitance and good cycle stability. The results open up new possibilities for the practical application of NiCo2O4 as an energy storage material.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Physical
Yu Liu, Zhenlin Ma, Na Xin, Yulong Ying, Weidong Shi
Summary: In this study, P-doped NiCo2O4/NiMoO4 multi-dimensional nanostructures were successfully synthesized as electrode materials for supercapacitors, exhibiting high specific capacitance at low current density and excellent cycle stability at high current density. A hybrid supercapacitor device was prepared with high energy density at low power density, and showed excellent capacity retention rate after a large number of cycles, demonstrating the huge potential of multi-dimensional metal oxides in energy storage.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Inorganic & Nuclear
Digambar Y. Nadargi, K. P. Shinde, Mohaseen S. Tamboli, Pavan M. Kodam, Ambar V. Ghadage, Nguyen Tam Nguyen Truong, J. S. Park, Sharad S. Suryavanshi
Summary: The electrochemical performance of divalent (Mn, Fe, Zn) substituted NiCo2O4 nanorods, developed using a facile hydrothermal route, was investigated. Mn substitution showed the best performance among the divalent replacements, exhibiting a specific capacitance of 1272 F/g, an energy density of 35.77 Wh/kg, and a power density of 660.39 W/kg. Fe and Zn substitution resulted in lower capacitance compared to pure NiCo2O4, likely due to lower catalytic activity. Mn substituted NiCo(2)O(4) demonstrates the potential for high performance supercapacitor applications.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Jihyeon Park, Seungju Jo, Narasimharao Kitchamsetti, Shakir Zaman, Daewon Kim
Summary: Recently, various electroactive materials composed of binary transition metal oxides and conducting polymers have been extensively studied. In this study, a new nanocomposite material with well-defined surface morphology and significant synergistic effect was developed using a hydrothermal method. The nanocomposite showed high performance in battery-type electrodes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Xiumei Chen, Na Xin, Yuxin Li, Cong Sun, Longhua Li, Yulong Ying, Weidong Shi, Yu Liu
Summary: In this study, a self-supporting electrode based on vertically grown two-dimensional/two-dimensional NiCo2O4/ZnCo2O4 hierarchical flakes was designed, using graphene and carbon nanotubes as the carbon-based conductive substrate. The experimental results showed that the electrode exhibited high capacitance and cycling stability, making it suitable for high-efficiency electrochemical energy storage devices.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Inorganic & Nuclear
Mengqi Cui, Zining Wang, Hui Wang, Xuyun Wang, Jianwei Ren
Summary: By controlling the grain boundaries in NiCo2O4/NiCo2S4 nanowires, significant enhancement in capacitance performance, excellent cycling stability, and high power density were achieved, indicating great potential for practical applications.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Physical
G. Santhosh, G. P. Nayaka, Aarti S. Bhatt
Summary: New and efficient mixed metal oxides of NiCo2O4/CeO2 have been prepared and characterized for their potential use in energy storage systems. The synthesized materials exhibited excellent specific capacitance and cycling stability, suggesting their suitability for energy storage applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Biochemistry & Molecular Biology
Peizhi Fan, Jie Wang, Wenfei Ding, Lan Xu
Summary: The combination of multiple electrode materials and their reasonable structural design can lead to the preparation of composite electrodes with excellent performance. This study focuses on the hydrothermal growth of five transition metal sulfides on the surfaces of carbon nanofibers grown with Ni(OH)(2) and NiO (CHO) prepared by electrospinning, hydrothermal growth, and low-temperature carbonization. The CHO/NiS composite electrode exhibits optimal electrochemical properties, with a specific capacitance of up to 1717 F g(-1) (1 A g(-1)). The asymmetric supercapacitor assembled with CHO/NiS-3h as the positive electrode demonstrates the potential application of multistage core-shell composite materials in high-performance supercapacitors.
Article
Chemistry, Physical
Numa A. Althubiti, Salma Aman, Naseeb Ahmad, Hafiz Muhammad Tahir Farid, Taha Abdel Mohaymen Taha
Summary: Transition metal oxides (TMOx) are promising materials for supercapacitors due to their high specific capacitance, safety, and notable electrochemical activity. This research focuses on the synthesis of Ce-doped Ni3S2 nanostructures using a surfactant-free hydrothermal method. The Ce-doped Ni3S2 exhibits enhanced cycling stability and demonstrates excellent electrochemical performance, with a maximum specific capacitance of 2349.10 F g-1 and energy density of 72.07 Wh kg-1 at 1 A g-1. This study highlights the potential of 0.3-CNS as a symmetric electrode material for next-generation supercapacitors.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Analytical
C. Shyamli Ashok, Ashalatha Vazhayil, Jasmine Thomas, Nygil Thomas
Summary: Nanostructured NiCo2O4 spinel is a promising electrode material for supercapacitors due to its eco-friendliness, low cost, and easy availability. By doping with Zn/Mn, the morphology of NiCo2O4 was changed and its specific capacitance was significantly improved. Mn-doped NiCo2O4 nanorod bundles showed higher internal surface charge storage compared to Zn-doped NiCo2O4 flowers. Mn-doped NiCo2O4 nanorod bundles achieved a maximum specific capacitance of 1494 F/g with good rate capability and excellent cycling stability. An asymmetric device using Mn-substituted NiCo2O4 as the positive electrode achieved a high energy density of 12 Wh/kg at a power density of 427 W/kg and could efficiently light up a light emitting diode.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
I Sheebha, Vanisree Venugopal, Judy James, V Maheskumar, A. Sakunthala, B. Vidhya
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2020)
Article
Chemistry, Physical
Ashwini Swaminathan, Ranjithkumar Ravi, M. Sasikumar, Mahadevaiah Dasaiah, G. Hirankumar, Sakunthala Ayyasamy
Article
Engineering, Electrical & Electronic
Manjula R. Shenoy, Sakunthala Ayyasamy, Mogalahalli VenkateshReddy Venkatashamy Reddy, Govindan Kadarkarai, J. Suryakanth, Saravanakumar Tamilarasan, Selvaraju Thangavelu, Arout Chelvane Jeyaramane
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2020)
Article
Engineering, Electrical & Electronic
Manjula R. Shenoy, Sakunthala Ayyasamy, Vidhya Bhojan, Rajesh Swaminathan, Nandhakumar Raju, P. Senthil Kumar, M. Sasikumar, Govindan Kadarkarai, Saravanakumar Tamilarasan, Selvaraju Thangavelu, J. Suryakanth, M. V. Reddy
Summary: The study investigates the efficiency of alpha-Fe2O3/hBN composite in degrading methylene blue under visible light, with emphasis on the impact of different weight percentages of hBN on photocatalytic performance. Results show that the addition of 5% hBN to alpha-Fe2O3 composite enhances the degradation efficiency and reaction rate.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Rojin Varghese, V. Shobin Vijay, S. Rajesh, A. Sakunthala, P. Senthil Kumar, Raman Sankar
Article
Materials Science, Multidisciplinary
V. Shobin Vijay, Rojin Varghese, A. Sakunthala, S. Rajesh, B. Vidhya
Summary: Vanadium oxide thin films were deposited on stainless steel substrates at different temperatures using pulsed laser deposition technique. The effect of post-annealing on the crystallization of V2O5 film was studied, showing a positive impact on crystallization. The structural and morphological properties were analyzed using XRD, Raman, and SEM, revealing changes in phase orientations and tunable morphological growth. The prepared thin films have potential applications in energy storage devices.
Article
Engineering, Electrical & Electronic
A. Banu, B. Filip Jones, V Muthuraj, Kadarkarai Govindan, P. Senthil Kumar, M. Sasikumar, M. Thamilselvan, B. Vidhya, S. Rajesh, A. Sakunthala
Summary: The study investigates the high photocatalytic degradation efficiency of MgNi0.5Mn1.5O4 compound doped with nickel for norfloxacin under UV-Vis light, attributed to a higher number of oxygen vacancies, increased light absorption, and better charge separation retention characteristics. The compound exhibits a high rate constant value and reusability up to four cycles, making it a promising candidate for efficient wastewater treatment through photocatalysis.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Physical
V. Thirumal, R. Yuvakkumar, P. Senthil Kumar, G. Ravi, M. Shobana, B. Saravanakumar, Dhayalan Velauthapillai
Summary: Thermally treated reduced graphene oxide (RGO) and N-S doped RGO were studied as electrocatalysts for hydrogen evolution reaction (HER). The NS-doped RGO exhibited a lower over-potential, Tafel slope, and solution resistance, as well as excellent stability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
V. Thirumal, R. Yuvakkumar, P. Senthil Kumar, B. Saravanakumar, G. Ravi, M. Shobana, Dhayalan Velauthapillai
Summary: In this study, the focus is on antimony nanoparticles as efficient electrocatalytic materials for hydrogen evolution reactions. The structure, optical, vibrational, and electrochemical properties are characterized, and the catalytic performance for hydrogen evolution is evaluated.
Article
Energy & Fuels
V. Thirumal, R. Yuvakkumar, B. Saravanakumar, G. Ravi, M. Isacfranklin, M. Shobana, Abdullah G. Al-Sehemi, Dhayalan Velauthapillai
Summary: Activated carbon synthesized from Tamarindus indica fruit shells by chemical vapour deposition method exhibited a hexagonal crystalline structure and graphitic phase formation. SEM analysis revealed the presence of voids and cracks on the surface of the material. The T-800 degrees C sample showed low overpotential, improved conductivity, and excellent electrochemical properties and stability.
Article
Engineering, Electrical & Electronic
R. Ranjithkumar, J. Deepak Rosario, Rajesh Swaminathan, Nandhakumar Raju, Vidhya Bhojan, Sakunthala Ayyasamy
Summary: The electroadhesive actuators were created using Cu-Ni fabric electrodes and hBN-incorporated BaTiO3 dielectric composite materials in PVdF-HFP matrix as the electroadhesive tape. The electroadhesive performance of the tape was tested with different weight percentages of ball-milled hBN. The load bearing capacity increased from 100 to 950 gm for a voltage of 250 V. The dielectric behavior of the tape was analyzed using an impedance analyzer, and XRD and SEM studies were performed to understand the behavior of the powder composites embedded in the tape.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Inorganic & Nuclear
S. Pavithra, S. P. Keerthana, R. Yuvakumar, P. Senthil Kumar, S. Rajesh, B. Vidhya, A. Sakunthala
Summary: In this study, iron oxide (beta-FeOOH) nanoparticles with a narrow size distribution were prepared using a simple precipitation method assisted by ultrasound. The nanoparticles exhibited excellent electrochemical performance.
INORGANIC AND NANO-METAL CHEMISTRY
(2023)
Article
Physics, Multidisciplinary
Ashwini Swaminathan, Biswadeep Ray, Rajesh Swaminathan, Vidhya Bhojan, Nandha Kumar Raju, Sakunthala Ayyasamy
Summary: CuO microspheres were successfully prepared using hydrothermal route with P123 as capping agent. The material exhibited monoclinic crystal structure and pseudo-capacitance properties, and showed non-toxicity in cytotoxicity studies.
INDIAN JOURNAL OF PURE & APPLIED PHYSICS
(2021)
Article
Polymer Science
R. Shobana, B. Saravanakumar, G. Ravi, V. Ganesh, R. Yuvakkumar
INTERNATIONAL JOURNAL OF PLASTICS TECHNOLOGY
(2020)
Article
Materials Science, Multidisciplinary
Hirankumar Gurusamy, Sakunthala Ayyasamy, Daries Bella
Summary: The study explored a non-aqueous electrolyte system with LiNfO as the salt and PC, DME as the solvent for lithium battery applications, showing high ionic conductivity and potential window stability, with fabricated lithium ion cells exhibiting high specific discharge capacity. The potential advantages of the proposed NALE are discussed in detail.
MATERIA-RIO DE JANEIRO
(2022)