Article
Environmental Sciences
Mangesh A. Desai, Amol S. Vedpathak, Abhishek R. Bhapkar, Ganesh D. Saratale, Shrikrishna D. Sartale
Summary: The study demonstrates a novel method for the growth of highly adherent and compact Mn3O4 thin films using the SILAR method, which can be successfully converted into MnO2 after chemical treatment. Both electrochemical and chemical conversion processes show significantly improved supercapacitive performance, making them useful for recycling battery waste for supercapacitor applications.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Energy & Fuels
Xianchao Wang, Jing Zhao, Kai Zhu, Jiaxin Yao, Qian Wang, Jun Yan, Dianxue Cao, Guiling Wang
Summary: In this study, nickel-doped manganese dioxide coupled with carbon tubes (Ni-MnO2@CTs) was prepared using a one-step hydrothermal method and carbonization processes. Ni-doping improved the electrical conductivity and expanded the voltage window of supercapacitors. The Ni-MnO2@CTs material exhibited high specific capacitance and energy density, making it a potential candidate for wide-voltage aqueous asymmetric supercapacitors.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Lakshmana Kumar Bommineedi, Bidhan Pandit, Babasaheb R. Sankapal
Summary: The nanostructured BiVO4 electrode shows excellent performance in supercapacitor applications, exhibiting high capacitance, exceptional stability, and outstanding capacitance retention. With a deep understanding of its structure and electrochemical properties, the potential applications of BiVO4 in future technologies are revealed.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Analytical
Thapelo P. Mofokeng, Sebenzile Shabalala, Aderemi B. Haruna, Patrick Mwonga, Zikhona N. Tetana, Kenneth I. Ozoemena
Summary: In this study, α-manganese oxide nanowires pre-intercalated with sodium and potassium ions (Na+/K+@α-MnO2) were successfully synthesized using a two-step method. The effects of different aqueous electrolytes on the energy storage properties of the nanowires were investigated. The results showed that KOH electrolyte exhibited higher specific capacitance and K+ ions exhibited more favorable pseudocapacitive behavior compared to Na+ ions. Furthermore, an asymmetric capacitor device based on N-CNTs@CF//Na+/K+@α-MnO2 showed excellent cycling performance and high specific energy and power densities.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Kanisorn Klangvijit, Winadda Wongwiriyapan, Teerayut Uwanno, Michiko Obata, Masatsugu Fujishige, Kenji Takeuchi, Mayuree P. Reilly
Summary: Mn3O4 hybrid structures were successfully synthesized using electrodeposition and SILAR techniques, and their morphology depended on the manganese precursors and synthesis techniques. Different morphologies, such as sea-grape-like, bird nest-like, flower-like, and nanoparticle morphologies, were obtained. The hybrid structure of nanoparticle-decorated bird nest-like heterostructure showed the highest areal capacitance of 390 mF cm-2 with low resistance in sodium sulfate electrolyte.
Article
Energy & Fuels
Lahu H. Kathwate, Sushant B. Patil, Yash S. Mane, Shivaji B. Sadale, Vishwanath D. Mote
Summary: The effect of annealing temperature on the electrochemical energy-storing performance of Mn3O4 thin films was investigated. The films were synthesized using the SILAR method and annealed at temperatures ranging from 50 to 350 degrees C. The structural, morphological, and electrochemical properties of the films were analyzed. X-ray diffraction and X-ray photoelectron spectroscopy confirmed the tetragonal hausmannite structure of the Mn3O4 thin films, while SEM analysis revealed morphological modifications after annealing. Cyclic voltammetry and electrochemical impedance spectroscopy were used to study charge storage kinetics, and the Mn3O4 thin films annealed at 250 degrees C showed the highest specific capacitance and excellent electrochemical stability.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Engineering, Environmental
Shuyun Yao, Rui Zhao, Shiyu Wang, Yixiang Zhou, Ruochen Liu, Lingyuan Hu, Anqi Zhang, Ru Yang, Xia Liu, Zhenzhen Fu, Dewei Wang, Zhiyu Yang, Yi-Ming Yan
Summary: This study introduces a structure distortion strategy via Ni doping in MnO2 to enhance its Na+ storage performance, demonstrating improved cycling stability and ionic transport kinetics. The Ni-MnO2 material achieved high specific capacity, excellent rate performance, and promising cycling life, showcasing potential for application in energy storage devices.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Ceramics
Hilal Pecenek, Sevda Yetiman, Fatma Kilic Dokan, M. Serdar Onses, Erkan Yilmaz, Ertugrul Sahmetlioglu
Summary: This study investigates the effect of carbon nanomaterials and MXene addition on MnO2 based supercapacitor electrodes, and finds that MXene based composite materials exhibit the highest specific capacitance and exceptional cycling efficiency. The favorable interaction between MnO2 and nanoscale materials enhances conductivity and surface area, leading to superior supercapacitor efficiency.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Botayna Bounor, Jensheer Shamsudeen Seenath, Sai Gourang Patnaik, David Bourrier, Chau Cam Hoang Tran, Jerome Esvan, Laurent Weingarten, Armel Descamps-Mandine, Dominic Rochefort, Daniel Guay, David Pech
Summary: Three-dimensional micro-supercapacitors based on highly porous Ni/MnO2 scaffolds are cost-effective and industrially feasible. These low-price electrodes demonstrate huge capacitance and excellent cycling stability, and can achieve extended cell voltages and high power using innovative Na-based ionogel electrolytes.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Physical
Patin Tagsin, Pitphichaya Suksangrat, Pawinee Klangtakai, Pornjuk Srepusharawoot, Chesta Ruttanapun, Pisist Kumnorkaew, Samuk Pimanpang, Vittaya Amornkitbamrung
Summary: The study utilizes electrophoretic deposition to prepare AC-MnO2 films as supercapacitor electrodes, which exhibit high specific capacitance and cycling stability. Analysis by EDX and XPS reveals the changes in sodium content and manganese oxide valence states during discharge and charge processes. Computational simulation shows the atomic connections during sodium insertion into the α-MnO2 structure.
APPLIED SURFACE SCIENCE
(2021)
Article
Energy & Fuels
Chia-Sheng Liu, Cheng-Liang Huang, Hsing-Chih Fang, Kuo-Yung Hung, Chien-An Su, Yuan-Yao Li
Summary: The study utilized coaxial fiber cables to achieve high specific capacitance in aqueous solution, high energy density, and power density within a linear working range. The binder-free, conductive-medium-free cable mat is foldable and suitable for use in flexible SC devices.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Nanoscience & Nanotechnology
Yimeng Sun, Chen Li, Subin Jiang, Rui Xia, Xing Wang, Haifeng Bao, Meizhen Gao
Summary: A one-pot hydrothermal method was used to self-assemble hollow nanostructured cobalt sulfides, avoiding high temperature calcination. The performances of CoS2, Co9S8, and Co3S4 in supercapacitors and electrocatalytic oxygen evolution applications follow the order: CoS2 > Co9S8 > Co3S4. Factors such as the presence of S-2(2-) may contribute to the performance difference in these cobalt sulfides.
Article
Energy & Fuels
Hadi Heydari, Majid Abdouss, Saeedeh Mazinani, Ali Mohammad Bazargan, Fataneh Fatemi
Summary: The behavior of the PANI/MoS2-MnO2 composite on a Glassy Carbon electrode for supercapacitor applications was studied in this work. The ternary composite serves as an electrode in both three and two electrode systems with superior electrochemical properties compared to binary complexes. The supercapacitor electrode consists of MoS2 nanosheets, MnO2, and polyaniline, providing high specific capacitance, energy, power, and cycling stability.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Energy & Fuels
Xingshuai Zhang, Feng Zhang, Danyang Wei, Ziyi Cai, Yu Song, Xiuying Wang
Summary: The development of K-doped 6-MnO2 is an effective strategy for enhancing the capacitance of MnO2-based supercapacitors. In this study, K-doped 6-MnO2 samples with controllable morphology and K content were synthesized by the redox reaction between KMnO4 and MnCl2.4H2O in the presence of KOH and acetone. The optimal sample exhibited a tremella-like structure composed of leaf-like nanosheets and had the highest K content.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Multidisciplinary
Miyeon Shin, Krishna Prasad Sharma, Kyong Kim, Ganesh Prasad Awasthi, Changho Yu
Summary: This paper presents a method of preparing a composite suitable for use in a supercapacitor, with morphology and phase conversion. The composite, which consisted of MnO2 nanoflakes and protonated g-C3N4, was prepared using a hydrothermal method. The composite's morphology and phase conversion were evaluated using various characterization techniques. The electrochemical performance of the composite was assessed, and it showed higher specific capacitance than its individual components. An asymmetric supercapacitor assembled with the composite achieved high energy density and power density. This study suggests a new approach for the development of MnO2-based composites for energy storage applications.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Chemistry, Multidisciplinary
Duong Nguyen Nguyen, Girish Sambhaji Gund, Min Gyu Jung, Seung Hun Roh, Jongwook Park, Jung Kyu Kim, Ho Seok Park
Article
Materials Science, Multidisciplinary
Mangesh A. Desai, Vidhika Sharma, Mohit Prasad, Girish Gund, Sandesh Jadkar, Shrikrishna D. Sartale
Summary: The study demonstrated a novel strategy for synthesizing ternary hybrid materials using SILAR and spin coating methods for photoelectrochemical performance evaluation. By optimizing SILAR cycles for Ag nanoparticles decoration on ZnO nanorods and adding MWCNT as a top layer, the PEC activity was significantly enhanced with improved charge collection and transport efficiency. The formation of MWCNT-Ag-ZnO ternary hybrid resulted in an active interface leading to excellent photocurrent density and photoconversion efficiency.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Environmental Sciences
Mangesh A. Desai, Amol S. Vedpathak, Abhishek R. Bhapkar, Ganesh D. Saratale, Shrikrishna D. Sartale
Summary: The study demonstrates a novel method for the growth of highly adherent and compact Mn3O4 thin films using the SILAR method, which can be successfully converted into MnO2 after chemical treatment. Both electrochemical and chemical conversion processes show significantly improved supercapacitive performance, making them useful for recycling battery waste for supercapacitor applications.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Energy & Fuels
Amol S. Vedpathak, Mangesh A. Desai, Sunita Bhagwat, Shrikrishna D. Sartale
Summary: A green strategy using aloe vera leaf extract was adopted to synthesize K+ion pre-inserted MnO2 and its hybrid with reduced graphene oxide, leading to improved supercapacitive performance through Na+ ion intercalation.
Article
Chemistry, Physical
Imran Shaikh, Mohammed Abdul Haque, Habib Pathan, Shrikrishna Sartale
Summary: This work demonstrates a simple and low-cost method for the uniform growth of silver nanoparticles as a SERS substrate. By using cationic dye MB and anionic dye CR as probe molecules, the study investigates the differences between electromagnetic field enhancement and chemical enhancement mechanisms. The results show that both EME and CE mechanisms contribute to the SERS enhancement of MB molecule on Ag NPs substrate, while only EME mechanism contributes to the enhancement of CR molecule.
Article
Materials Science, Multidisciplinary
Imran Shaikh, Shrikrishna Sartale
Summary: In this study, silver nanoparticles (Ag NPs) were grown on glass substrate using a simple and low-cost spin coating method followed by chemical reduction. The grown Ag nanoparticles were examined using UV-Vis absorption spectra and scanning electron microscope images. The effect of variation in revolution per minute (rpm) on the growth of Ag NPs and the surface-enhanced Raman scattering (SERS) activity of methylene blue (MB) was investigated. The Ag NPs grown at 1000 rpm were found to be the optimized SERS substrate, providing an enhancement factor of the order of 10^8, enabling the detection of nano-molar concentrations of MB and melamine in milk below the allowed limit. The obtained SERS substrate showed good sensitivity and excellent reproducibility with relative standard deviation values of 5.43% for spot to spot reproducibility and 5.65% for substrate to substrate reproducibility. This study presents a simple and cost-effective method to fabricate Ag NPs SERS substrate for the trace detection of MB as a water pollutant and melamine as a milk adulterant.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Energy & Fuels
Mingyu Jung, Girish S. Gund, Bruce Dunn, Ho Seok Park
Summary: Organic active materials have great potential to replace inorganic counterparts due to their adjustable redox activity, mild synthesis conditions, and multi-electron reactions. However, their application is limited by issues such as dissolution in aqueous electrolyte and low electrical conductivity. In this study, self-assembled nanorods of perylene-3,4,9,10-tetracarboxylic dianhydride (NRPTCDA) were synthesized on carbon cloth for high-performance Zn-ion storage. By optimizing the synthesis conditions, the vertical orientation and length of the nanorods were controlled, facilitating Zn-ion insertion-deinsertion. The NRPTCDA cathode achieved a high capacity of 127.5 mAh g-1 at a current density of 1 A g-1 in an aqueous Zn-ion battery, with a retention of 82.10 mAh g-1 even at a high current rate of 50 A g-1. The structure-controlled NRPTCDA exhibited 90.1% rate capability at 100 mV s-1 and 78.91% capacity retention over 10,000 galvanostatic charge-discharge cycles at a current density of 10 A g-1. Ex situ X-ray diffraction, attenuated total reflectance-Fourier transform infrared spectroscopy, and field emission scanning electron microscopy measurements confirmed the structural, chemical, and morphological stability and reversibility of NRPTCDA electrodes for Zn2+ ion storage.
Article
Chemistry, Physical
Amol Vedpathak, Tanuja Shinde, Mangesh Appasaheb Desai, Balu R. Thombare, Ranjit Humane, Suyog Asaram Raut, Ram Kalubarme, Shrikrishna Dattatraya Sartale, Sunita Bhagwat
Summary: This study presents a simple ultrasonic-assisted chemical route to prepare Na2V6O16 (NVO) nanobelts. The formation of 1D NVO nanobelt structures is confirmed using various characterization techniques. These synthesized NVO nanobelts exhibit high capacitance and are used as electrode materials for supercapacitor (SC) applications. An asymmetric coin cell SC device of activated carbon//NVO is fabricated, which delivers high energy and power densities along with good capacity retention.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Baliram Nadekar, Girish S. Gund, Yogesh B. Khollam, Shoyebmohamad F. Shaikh, Dattatray S. Wavhal, Deepak P. Dubal, Pravin More
Summary: With the rapid growth in the manufacturing industry, the emission of hazardous volatile organic compounds (VOCs) has increased, leading to a demand for highly sensitive, selective, and stable gas sensors. We have addressed the issues associated with chemoresistive alcohol sensors by using iodine-doped polyvinyl acetate (IPVAc) films, which offer benefits like low power consumption, ease of manufacture, and long-term stability. These films demonstrated high selectivity for alcohols over other VOCs and stable sensitivity performance over a wide temperature range. Therefore, plasma-polymerized IPVAc films can be applied for highly selective, sensitive, and stable VOC sensing applications.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Mohammed Abdul Haque, Amruta Lohar, Richa Gahlaut, Imran Shaikh, Shrikrishna Sartale, Shailaja Mahamuni
Summary: In this study, strongly confined CsPbBr3 perovskite quantum dots (PQDs) were synthesized and their photoluminescence properties were investigated. Stable exciton with exciton binding energy of 119 meV was observed in the strongly confined PQDs. Treatment with sodium thiocyanate (NaSCN) was found to remove excess surface Pb ions and improve the average on-time of the PQDs. The research highlights the importance of strongly confined PQDs with stable exciton and the use of suitable dielectric matrix for QD immobilization.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Electrochemistry
Akshay Nandkishor Vyas, Jalindar Dnyandeo Ambekar, Bharat Bhanudas Kale, Shrikrishna Dattatraya Sartale
Summary: A facile wet chemical method called successive ionic layer adsorption and reaction (SILAR) was used to grow palladium nanoparticles on a graphite substrate. These nanoparticles demonstrated successful electrooxidation of ethanol in an alkaline solution. The electrocatalytic activity of the grown palladium nanoparticles was studied using cyclic voltammetry (CV) measurements. The growth parameters, such as precursor concentration and number of SILAR growth cycles, affected the electrooxidation of ethanol by the palladium nanoparticles. The excessive growth of the nanoparticles due to a large number of SILAR growth cycles resulted in a shift from period-one cyclic voltammograms to high order periodic/aperiodic cyclic voltammograms. Furthermore, palladium nanoparticles were also grown on a gold-coated quartz crystal to monitor mass changes during electrochemical surface oxidation/reduction, with and without ethanol in an alkaline solution. Electrochemical quartz crystal microbalance (EQCM) was used in situ along with potential scanning to measure the mass changes occurring during CV measurements.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Applied
Somnath R. Khaladkar, Oshnik Maurya, Girish Gund, Bhavesh Sinha, Deepak Dubal, R. R. Deshmukh, Archana Kalekar
Summary: In this study, nickel selenide nanoparticles were grown on two-dimensional graphitic carbon nitride nanosheets to form a three-dimensional composite material. The resulting material exhibited excellent electrochemical performance, with high specific capacity at high current density and good cyclic stability and energy density in a hybrid supercapacitor device.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Chemistry, Physical
Rahul B. Pujari, Girish S. Gund, Swati J. Patil, Ho Seok Park, Dong-Weon Lee
JOURNAL OF MATERIALS CHEMISTRY A
(2020)
