Article
Materials Science, Multidisciplinary
Sengodu Prakash, Veeman Sannasi, Mamali Das
Summary: To address concerns about the safe use of energy storage devices, researchers and industries have developed a symmetric capacitor with electrolyte embedded V2O5-rGO composite (VGS). Electrochemical methods were used to systematically study the prepared composites. The VG20S composite demonstrated an excellent specific capacitance (566.7 mF cm-2) with 80.5% capacity retention after 3000 cycles, as well as a maximum power density of 750 W cm-2 and energy density of 15.625 Wh cm-2.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Chemistry, Analytical
S. Y. Ahmed, Saad G. Mohamed, Sayed Y. Attia, Yosry F. Barakat, M. A. Shoeib, N. S. Tantawy
Summary: The study focused on tin selenide (SnSe) as a supercapacitor electrode, obtaining SnSe nanorods via a simple method and studying its modification with reduced graphene oxide (rGO). The SnSe/7rGO composite exhibited the best electrochemical performance, showing potential for applications in supercapacitors.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Abiola Ganiyat Olatoye, Wenli Li, Emmanuel Oluwaseyi Fagbohun, Xi Zeng, Yuhua Zheng, Yanbin Cui
Summary: In this study, Ni-metal-organic-framework (Ni-ZIF-67) was successfully deposited on MXene to improve its specific capacitance and cycling stability. The NZ-R-2-200/K-Ar-MXene composite exhibited a remarkable specific capacity of 557 C/g at 0.5 A/g and long-term stability with 66% capacitance retention after 5000 cycles at 2 A/g. The assembled asymmetric supercapacitor (ASC) based on NZ-R-2-200/K-Ar-MXene as the positive electrode and NPC/rGO as the negative electrode showed a high energy density of 27.48 Wh/Kg and a cyclic stability up to 2000 cycles.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Energy & Fuels
Xin Xu, Shang Wu, Xin Sun, Shuo Tian, Chaoyang Liu, Penghui Zhang, Shuaishuai Fu, Yanbin Wang, Qiong Su, Xia Wang, Quanlu Yang
Summary: In this study, a rectangular nanorods microstructure with abundant pores is designed to enhance the energy density and accelerate the marketable applications of supercapacitors. Bi2O3/BiFeO3 rectangular nanorods with rich mesoporous structure are derived from the iron-bismuth based Prussian blue analogue, which exhibit a large specific capacitance and long cycle life. The NiCo-LDH/rGO//Bi2O3/BiFeO3 device achieves an enormous energy density and high capacity retention ratio, indicating the great potential of Bi2O3/BiFeO3 as a negative electrode of supercapacitors.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Materials Science, Multidisciplinary
Sreenivasa Kumar Godlaveeti, Adinarayana Reddy Somala, Ramamanohar Reddy Nagireddy
Summary: The reduced graphene oxide-strontium oxide nanorods (RGO/SrO NRs) were prepared using a simple and eco-friendly hydrothermal synthesis method. The synthesized composite powder of RGO/SrO NRs was characterized and confirmed through different characterization techniques. The electrochemical performance of individual SrO NRs and RGO/SrO NRs was studied in different KOH electrolyte solutions and showed promising results, especially in the 6 M KOH electrolyte solution.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Multidisciplinary
Jahangeer Ahmed, Tansir Ahamad, Saad M. Alshehri
Summary: This study focuses on the synthesis of low-cost electrocatalysts, i.e. reduced graphene oxide (rGO) supported CuMoO4 nanoparticles (CuMoO4 NPs@rGO nanocomposites), for electrochemical water splitting reactions particularly OER. The prepared materials show superior OER activity compared to pure CuMoO4 nanoparticles.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Quoc Bao Le, Thanh-Huong Nguyen, Haojie Fei, Constantin Bubulinca, Lukas Munster, Nikola Bugarova, Matej Micusik, Rudolf Kiefer, Tran Trong Dao, Maria Omastova, Natalia E. Kazantseva, Petr Saha
Summary: Benzendicarboxylic acid (BDC)-based metal-organic frameworks (MOFs) have been widely used in various applications, including supercapacitor electrode materials. This study investigates the effects of PANI and Mn/Cu-MOF on the properties of electrode materials, using reduced graphene oxide (rGO) as the matrix to fabricate electrochemical double-layer supercapacitors. The highest specific capacitance of about 276 F/g was achieved for the rGO/Cu-MOF@PANI composite at a current density of 0.5 A/g.
SCIENTIFIC REPORTS
(2022)
Article
Materials Science, Ceramics
Satiye Korkmaz, I. Afsin Kariper, Onur Karaman, Ceren Karaman
Summary: In this study, ruthenium was bonded to reduced graphene oxide to create aerogel electrodes with high specific capacitance and energy density for symmetrical supercapacitors. Through CV voltammograms testing, the aerogel exhibited a highest specific capacitance of 328.6 F g-1 and maintained a high energy density even at high power densities.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Rajendra Panmand, Yogesh Sethi, Animesh Jha, Bharat Kale
Summary: A facile microwave-assisted solvothermal process is used to synthesize narrow-size distributed α-Fe2O3, α-Fe2O3/Fe3O4, and Fe3O4 nanostructures with PVP as a surfactant. The influence of the reaction media on the formation of different iron oxide phases is investigated. The α-Fe2O3/Fe3O4 nanoheterostructure exhibits the highest capacitance among all samples due to improved charge transfer and increased active sites.
Article
Engineering, Electrical & Electronic
Weiguo Zhang, Pan Yang, Hongzhi Wang, Shaofeng Sun, Suwei Yao
Summary: The research on electrode materials for supercapacitors has mainly focused on cathode materials, resulting in little work on anode materials. This hinders the improvement of energy density in supercapacitors. This study aimed to develop a high-performance and low-cost anode material for supercapacitors. Fe3O4 was synthesized using a hydrothermal method, and Fe3O4/rGO nanocomposites were prepared by treating Fe3O4 with graphene oxide. The Fe3O4/rGO nanocomposites exhibited a higher specific capacitance of 571.2 F g(-1) at 1 A g(-1), compared to pure Fe3O4 (214.7 F g(-1)). By assembling Fe3O4/rGO//MnO2 asymmetric supercapacitors, a device with an energy density of 95.1 Wh kg(-1) at a power density of 2881 W kg(-1) was achieved. After 10,000 cycles at 10 A g(-1), the ASC retained 87.2% of its original capacitance, demonstrating that Fe3O4/rGO nanocomposites are ideal anode materials for high-performance supercapacitors.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Physical
S. Maruthasalamoorthy, K. Aishwarya, R. Thenmozhi, R. Nirmala, C. Nagarajan, R. Navamathavan
Summary: Rare-earth lanthanum (La) supported Bi2S3@g-C3N4 heterostructure composite was synthesized to improve the cyclic stability of Bi2S3 transition metal dichalcogenides (TMD). Various characterization techniques were used to investigate the physicochemical properties of the electrode material, and the La doped Bi2S3@g-C3N4 heterostructure composite exhibited excellent electrochemical performance and cyclic stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Electrical & Electronic
Huimin Dai, Rong Li, Siyu Su, Yifan Cui, Yueming Lin, Liang Zhang, Xiaohong Zhu
Summary: In this study, a series of polyaniline/reduced graphene oxide binary composites and polyaniline/multi-walled carbon nanotubes/reduced graphene oxide ternary composites were prepared using a hydrothermal method. The morphology, structure, and electrochemical performance of these composites were analyzed. Results showed that the PCG-5 composite exhibited excellent electrochemical performance with high specific capacitance, good capacitance retention, and remarkable cycling stability. These composites are considered to have great potential as supercapacitor electrodes.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Anuja A. Yadav, Yuvaraj M. Hunge, Seok-Won Kang, Akira Fujishima, Chiaki Terashima
Summary: Semiconductor-based photocatalyst materials have played a crucial role in the degradation of organic compounds. Photocatalysis is a simple, cost-effective, and environmentally friendly method for degrading organic compounds. In this study, vanadium pentoxide (V2O5) and V2O5/RGO (reduced graphene oxide) composite materials were synthesized using a hydrothermal method. The prepared samples were characterized using various techniques. Raman analysis confirmed the presence of RGO characteristic peaks in the composite and different vibrational modes of V2O5. The V2O5/RGO composite exhibited superior photocatalytic performance compared to V2O5, indicating the importance of both the catalyst and light in the degradation process.
Article
Chemistry, Physical
Kian Yousefipour, Rasoul Sarraf-Mamoory, Amin Yourdkhani
Summary: Researchers improved the electrical conductivity and supercapacitive properties of hydrated nickel molybdate by synthesizing Fe-doped HNMO/rGO materials. They found that the material with 15 mg mL(-1) graphene oxide suspension exhibited the best electrochemical performance.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Environmental Sciences
Narthana Kandhasamy, Laguduva K. Preethi, Devendiran Mani, Lukasz Walczak, Tom Mathews, Rajendran Venkatachalam
Summary: This study presents a new integration strategy of transition metal sulfide with carbon-based materials to enhance its catalytic and electrochemical performances for supercapacitor application. The synthesized beta-NiCu2S/rGO nanocomposite electrode with 0.15wt% of rGO exhibits the highest specific capacitance and excellent cycling stability. These findings demonstrate the potential of beta-NiCu2S/rGO nanocomposite as an electrode material for supercapacitor energy storage system.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
D. Govindarajan, F. Joy Johanson, V. Uma Shankar, M. Joseph Salethraj, R. Gopalakrishnan
Summary: Europium vanadate nanorods were successfully synthesized and characterized, showing potential as perfect electrodes in supercapacitors based on their structural and performance analyses.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
V. Uma Shankar, D. Govindarajan, R. Gopalakrishnan, T. Maiyalagan, M. Joseph Salethraj
Summary: Sn-V2O5/rGO nanocomposite materials prepared by sol-gel method demonstrate excellent electrochemical performance, with high reversible specific capacitance and good capacitance retention during charge/discharge cycles.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
D. Govindarajan, Joy F. Johanson, Uma Shankar, Joseph M. Salethraj
Summary: In this study, tetragonal SmVO4 nanorods were successfully prepared using a simple solvothermal method. Characterization through XRD and Raman spectroscopy confirmed high crystallinity and purity. Morphology analysis showed rod-shaped nanoparticles without impurities, optical properties exhibited multiple excitations and emissions, magnetic properties were paramagnetic, and electrochemical performance demonstrated a high specific capacitance value.
MATERIALS TECHNOLOGY
(2022)
Article
Environmental Sciences
M. Ramya, P. Senthil Kumar, Gayathri Rangasamy, V. Uma Shankar, G. Rajesh, K. Nirmala
Summary: An electrochemical sensor using a copper oxide Molybdenum sulfide modified electrode was employed for the detection of sulfamethoxazole. The CuO/MoS2 modified electrode exhibited exceptional electrochemical performance, showing enhanced conductivity and linear correlation between peak current and SMX concentration, with a reliable detection limit of 0.3 mu M.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Inorganic & Nuclear
C. Manoharan, R. Rammohan, R. Subramanian, V. Umashanker
Summary: Alpha-Bismuth oxide nanoparticles (alpha-BiNPs) were successfully synthesized using oxalic acid as a reducing agent, and characterized using various techniques. The synthesized alpha-BiNPs showed promising photocatalytic activity, making them suitable for environmental applications.
INORGANIC AND NANO-METAL CHEMISTRY
(2023)
Proceedings Paper
Materials Science, Multidisciplinary
P. Christuraj, M. Dinesh Raja, S. Pari, D. Madankumar, V. Uma Shankar
Summary: Pure and Zn-doped CdS nanoparticles were synthesized using co-precipitation method and characterized by XRD, FTIR, and SEM. Cyclic voltammetry analysis showed that both CdS and CdS-Zn electrodes exhibited pseudocapacitive behavior with high specific capacitance.
MATERIALS TODAY-PROCEEDINGS
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
V. Uma Shankar, D. Govindarajan, P. Christuraj, M. Joseph Salethraj, F. Joy Johanson, M. Dinesh Raja
Summary: Ni-doped V2O5 nanorods were successfully synthesized by a simple sol-gel method, and their structure and properties were analyzed. The results showed that the doped samples still possessed an orthorhombic structure, with Ni particles decorated on the nanorod surfaces. Electrochemical performance tests demonstrated that both V2O5 and Ni:V2O5 electrodes exhibited excellent pseudocapacitive behavior.
MATERIALS TODAY-PROCEEDINGS
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
Suganya Palani, Manikandan Venkatachalam, Revathi Palanisamy, Uma Shankar Veerasamy, Krishnasamy Kuppusamy
Summary: A Tagetes flower-shaped SnS2 nanostructure was successfully synthesized via solvothermal method, showing excellent electrochemical performance with high capacity retention cyclic stability. This suggests that metal sulfides are promising electrodes for electrochemical energy storage applications.
MATERIALS TODAY-PROCEEDINGS
(2021)
