Article
Chemistry, Physical
Naresh Vangapally, Kiran Kumar, Amit Kumar, Surendra K. Martha
Summary: The efficient synthesis of MnO2 nanorods and carbon composite from table sugar precursors facilitates the development of high-performance supercapacitors. The resulting C/MnO2 composite demonstrates superior electrochemical performance with good capacitance retention and high energy density.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Nanoscience & Nanotechnology
Akshay Salkar, Amarja P. Naik, Sheshanath Bhosale, Pranay P. Morajkar
Summary: The study introduces a facile synthesis route for designing a DNA-like double helical WO3-x/C superstructure via self-assembly of carbon fiber-encapsulated WO3-x nanorods. The innovative design strategy shows excellent electrochemical performance and cycling stability.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Mohammad Taghi Tourchi Moghadam, Majid Seifi, Fatemeh Jamali, Sadegh Azizi, Mohammad Bagher Askari
Summary: In this study, zinc tungstate and zinc tungstate-carbon nanotube were synthesized as supercapacitor electrodes, showing excellent capacitance and stability. Zinc tungstate-carbon nanotube, as the positive electrode in an asymmetric supercapacitor, demonstrated high capacitance and appropriate cycling stability.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Physical
Hamed Pourfarzad, Ramin Badrnezhad, Mostafa Ghaemmaghami, Mohammad Saremi
Summary: A ternary nanocomposite of C3N4/Polypyrrole/MnO2 was prepared and showed promising electrochemical performance for supercapacitor application, with high specific capacitance, energy density, and cycling stability. The unique morphology of the material, along with the role of C3N4 as a directing agent, contributed to its superior performance in high-performance supercapacitors.
Article
Energy & Fuels
Shilpi Sengupta, Manab Kundu
Summary: The multiple oxidation states of redox-active materials enable them to store higher energy than carbon-based electrode materials. Therefore, designing asymmetric supercapacitors by coupling redox-active materials with carbon-based electrodes is an attractive strategy.
Article
Electrochemistry
Batoul Hosseinzadeh, Bhawna Nagar, Raul Benages-Vilau, Pedro Gomez-Romero, Sayed Habib Kazemi
Summary: By pyrolysis of a simple Cobalt Metal Organic Framework (MOF), a high-performance hybrid composite electrode with superb capacity and power density was successfully synthesized. An asymmetric supercapacitor (ASC) fabricated using this composite material showed excellent energy density and power density performance.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Mi He, Linli Cao, Weilong Li, Xinwei Chang, Zhaoyu Ren
Summary: A hierarchical alpha-MnO2 nanotube@delta-MnO2 nanoflake structure was successfully fabricated on 3D graphene foam as a lightweight and free-standing electrode for supercapacitors. The composite electrode exhibited excellent electrochemical performance, with a maximum specific capacitance achieved at 60% MnO2 mass percentage. An asymmetric supercapacitor based on the GF@MNT@MNF composites showed a great energy density under a wide potential range.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Na Lei, Yin Qiao, Guanfu Liu, Renhao Xu, Guohua Jiang, Muslum Demir, Pianpian Ma
Summary: Cobalt-based perovskite SrCo0.875Nb0.125O3 is a promising electrode material for supercapacitors. However, the particle form of SrCo0.875Nb0.125O3 is not favorable for electrochemical behavior. By modifying the surface with MnO2, the specific surface area of SrCo0.875Nb0.125O3 electrode is significantly increased and grain agglomeration is inhibited, leading to optimized electrochemical performance.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Physical
Shiva Moraveji, Lida Fotouhi, Mohammad Zirak, Saeed Shahrokhian
Summary: A facile one-step electrodeposition method was used to deposit Ni-Co nanospheres on nickel foam substrate, providing excellent electrical conductivity and efficiency of electrode materials. The Ni-Co nanosphere electrode demonstrated good specific capacity and cyclic stability, as well as low internal resistance and high surface area. An asymmetric supercapacitor fabricated using Ni-Co nanospheres and activated carbon achieved high energy and power densities.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Energy & Fuels
Yudi Wei, Mingming Zheng, Wenlong Luo, Bo Dai, Jiajia Ren, Mingliang Ma, Tingxi Li, Yong Ma
Summary: This study presents a flexible asymmetric supercapacitor device based on MXene, with an increased voltage window of 1.5 V, more than twice wider than symmetric devices. The asymmetric device exhibits high specific capacitance, good cycling stability, and can power a 3 V LED for 90 minutes after being bent 1000 times. It shows excellent application prospects for the next generation of electrochemical energy storage devices.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Materials Science, Multidisciplinary
Qasim Abbas, Lianghua Wen, Abdul Mateen, Najam Ul Hassan, Asim Idrees, Zia Ur Rehman, Majed A. Bajaber, Muhammad Sufyan Javed
Summary: This study synthesized hexagonal-phase manganese dioxide nanoparticles on conductive carbon cloth through a simple hydrothermal strategy. The resulting structure showed a large specific surface area and high porosity, making it an excellent candidate for positive electrode materials in high-performance supercapacitors. The electrode exhibited a high specific capacitance and excellent cycling stability.
Article
Chemistry, Physical
Nourali Mohammadi, Keivan Pourreza, Narmin Bahrami Adeh, Mehran Omidvar
Summary: A novel nanocomposite based on DMC and MnO2 exhibited high specific capacitance, good rate performance, and cycling stability. Structural analyses confirmed the excellent performance of the nanocomposite material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Energy & Fuels
Sadananda Muduli, Subir K. Pati, Smrutirekha Swain, Surendra K. Martha
Summary: The MoO3-ZnO composite material exhibits good specific capacitance and cycling stability in 1 M Na2SO4, making it a suitable electrode material for supercapacitors.
Article
Materials Science, Ceramics
Bidhan Pandit, Emad S. Goda, Mohd Ubaidullah, Shoyebmohamad F. Shaikh, Umesh T. Nakate, Akhil Pradiprao Khedulkar, Abu ul Hassan Sarwar Rana, Dinesh Kumar, Ruey-an Doong
Summary: The hierarchical hexagonal nanoplate structure of delta-MnO2 provides ample space for large ions transport and storage. The MnO2 electrode exhibits good battery performance as a cathode material for potassium ions, with higher rate performance in EC:DEC electrolyte than in PC electrolyte. The stability and high coulombic efficiency of MnO2 make it a potential candidate for commercialization in future K-ion batteries.
CERAMICS INTERNATIONAL
(2022)
Article
Energy & Fuels
Xintao Ma, Shuo Wang, Hui Wang, Junjie Ding, Sen Liu, Zixu Huang, Wenzhi Sun, Guijing Liu, Ling Wang, Wenlong Xu
Summary: The lack of efficient charge exchange between layered structures severely limits the application of layered double hydroxides (LDH) in supercapacitors. This study composites FeCo-LDH with C3N4 and builds a penetrating structure to solve the charge transfer problem. The electrochemical test shows that the composite material has a high specific capacity. The designed asymmetric supercapacitor exhibits good stability in cycling tests.
JOURNAL OF ENERGY STORAGE
(2022)
Editorial Material
Chemistry, Inorganic & Nuclear
D. D. Sarma, B. V. R. Chowdari, Sean J. Hearne, Mike Fitzsimmons, C. Jagadish
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Swapnil Shukla, Sayed Muktar Hossain, Sakshi Mehta, Sujit Kamilya, Abhishake Mondal, D. D. Sarma
Summary: A novel magnetic cluster containing low-spin Fe3+ and Cu2+ ions with competing ferromagnetic and antiferromagnetic interactions was designed and synthesized. Magnetic measurements revealed unique magnetic properties, including ferromagnetic interactions dominating at higher temperatures and possible antiferromagnetic interactions at lower temperatures, potentially leading to a glassy state below 4 K.
BULLETIN OF MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
V. K. Sharma, R. Mukhopadhyay, A. Mohanty, V. Garcia Sakai, M. Tyagi, D. D. Sarma
Summary: The partial substitution of MA cations in MAPbI(3) by FA ions alters the dynamics of organic units, with temperature having different effects on the two types of perovskites.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Editorial Material
Chemistry, Physical
D. D. Sarma
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Menno Bokdam, Jonathan Lahnsteiner, D. D. Sarma
Summary: Two seemingly similar crystal structures of low-temperature MAPbX(3) perovskites have different relative methylammonium ordering, making them difficult to distinguish through X-ray diffraction experiments. By utilizing an on-the-fly machine-learning force field method, researchers were able to reduce computation time significantly and observe the anharmonic motion of molecules at different temperatures, ultimately determining the thermodynamically stable structure through isothermal-isobaric simulations.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Review
Chemistry, Multidisciplinary
Susmita Paul, Katsuhiko Ariga, D. D. Sarma, Somobrata Acharya
Summary: Metal halide perovskites synthesized via template-based method can produce nanocrystals/microcrystals with defined shape and spatial dimensionality, showing great potential as an alternative to current synthetic techniques.
Article
Chemistry, Multidisciplinary
Rohit Kumar Rohj, Akmal Hossain, Priya Mahadevan, D. D. Sarma
Summary: This study theoretically explored the co-doping of Cu and Te in BaTiO3 to reduce its bandgap while retaining ferroelectric properties, suggesting a potential design strategy for photocatalysis and photovoltaic materials.
FRONTIERS IN CHEMISTRY
(2021)
Editorial Material
Chemistry, Physical
D. D. Sarma
ACS ENERGY LETTERS
(2021)
Article
Chemistry, Physical
V. K. Sharma, R. Mukhopadhyay, A. Mohanty, V. Garcia Sakai, M. Tyagi, D. D. Sarma
Summary: This study investigates the dynamics of formamidinium cation in hybrid lead halide perovskites using neutron spectroscopy. The results reveal significant variations in the reorientational motions of the cation with temperature and halide type.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Inorganic & Nuclear
Debendra Prasad Panda, Diptikanta Swain, Rohit Kumar Rohj, D. D. Sarma, A. Sundaresan
Summary: Organic-inorganic hybrid (OIH) halide perovskite is a promising material in the field of semiconductors, and efforts have been made to design new lead-free OIH halides for optoelectronic applications. We have synthesized a perovskitoid compound and an antiperovskite compound with unique structures and properties. The perovskitoid compound displays switchable dielectric property, while the antiperovskite compound exhibits higher photoluminescence quantum yield and magnetic properties. This structure-property relationship in OIH manganese halides will contribute to the design of new perovskites and antiperovskites.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Sudeshna Ghosh, Debasmita Pariari, Tejmani Behera, Pablo P. Boix, Narasimha Ganesh, Susmita Basak, Arya Vidhan, Nisha Sarda, Ivan Mora-Sero, Arindam Chowdhury, Kavassery Sureswaran Narayan, D. D. Sarma, Shaibal K. Sarkar
Summary: In this study, the nonradiative recombination losses in conventional (n-i-p) solar cells using hybrid halide perovskite materials were investigated. It was found that the deposition of organic cations on the perovskite led to buried defect states, which negatively impacted the operational stability of the devices. A passivation technique using atomic layer deposition of Al2O3 was proposed, which significantly improved the device performance, increased the open-circuit voltage, and enhanced the photoluminescence and electroluminescence quantum efficiency.
ACS ENERGY LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Ranjan Das, Modasser Hossain, Arup Mahata, Diptikanta Swain, Filippo De Angelis, Pralay K. Santra, D. D. Sarma
Summary: We have found that the formally 0D (R-/S-MBA)2CuBr4 possesses exceptional chiro-optical properties due to a chiral transfer from the organic component to the inorganic layer. The compound exhibits the highest chiral anisotropy factor, gCD, in the orange-red part of the visible spectrum reported so far. The incorporation of bromine in the copper coordination sphere red-shifts the absorption edge, allowing for sensitivity in the orange-red range.
ACS MATERIALS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
S. Sarkar, O. Eriksson, D. D. Sarma, I. Di Marco
Summary: This article investigates the structural and electronic properties of the ZnSexS1-x solid solution alloy in the wurtzite structure using density functional theory. The study shows that the bond lengths between nearest neighbors in the ZnS and ZnSe compounds are almost preserved, but start to follow Vegard's law from the third shell onward. The deformation of the structure is found to be the main cause of the deviation from linearity observed in the band gap. The difference in stiffness between ZnS and ZnSe plays a significant role in the asymmetric behavior of the bowing parameter.
Article
Materials Science, Multidisciplinary
Tinku Dan, Ashutosh Mohanty, Anirban Dutta, Rahul Mahavir Varma, Sagar Sarkar, Igor Di Marco, Olle Eriksson, Edmund Welter, Simone Pollastri, Luca Olivi, K. R. Priolkar, D. D. Sarma
Summary: The Vegard's law accurately describes the evolution of lattice parameters in solid solutions, with investigations revealing common features between cationic and anionic solid solutions, while also questioning the accuracy of the concept of chemical pressure. Additionally, there were qualitative differences found between cationic and anionic solid solutions.
Article
Chemistry, Multidisciplinary
Bhushan P. Kore, Shyamashis Das, D. D. Sarma
Summary: The study investigates the optical and photovoltaic properties of Mn2+ doped MAPbCl(3) nanocrystals, revealing a high photoluminescence quantum yield and efficient energy transfer to Mn2+. By adjusting the Br concentration in the alloyed system, the band gap limitations of the experimental technique are overcome to allow for temperature-dependent measurements of the PL properties.
JOURNAL OF CHEMICAL SCIENCES
(2021)