Article
Energy & Fuels
Syed Mansoor Ali, H. Kassim, ZabnAllah M. Alaizeri, Mohammed Shahabuddin
Summary: The global exploration for novel materials useful for energy storage and environmental protection is driven by energy shortage and environmental degradation. This study focuses on pseudocapacitors as electrode materials and investigates the use of metal selenides, specifically tin selenide (SnSe), with reduced graphene oxide (rGO) nanostructures. The results show that SnSe/rGO nanostructures exhibit higher specific capacitance response and better stability, indicating their potential application in supercapacitors.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Yuanyuan Zhang, Dong Zhang
Summary: All-solid-state structural supercapacitors (ASSCs) are multifunctional energy storage devices with great potential in the field of building applications. However, the low energy density has been a major limitation. In this study, a novel 3D nanosheet material is designed to enhance the areal-energy-density of ASSCs. By incorporating S (Na2S center dot 9 H2O) into rGO/N1C1M nanosheets, a significantly higher areal capacitance is achieved, demonstrating superior performance compared to previous rGO/NCM electrodes. A prototype device of asymmetric ASSCs exhibits excellent performance, with high areal capacitance and areal-energy-density. The demonstration of using the designed electrode opens up new opportunities for high-performance ASSCs in building energy storage.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Inorganic & Nuclear
S. Karthikeyan, M. Selvapandiyan, A. Sankar
Summary: La2O3 nanoparticles decorated reduce graphene oxide nanosheets were synthesized to be used as electrode material in high performance supercapacitor. The hybrids exhibited enhanced electrochemical performance and cycling stability, demonstrating high energy density and cycle retention rate in the two-electrode system. The enhancement of specific capacitance is explained by the charge transfer effect between rGO and La2O3 at the interface.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
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
Que Thi Nguyen, Umesh T. Nakate, JinYu Chen, Soojin Park, Sungjune Park
Summary: Overcoming the limitation of low energy density is a challenge for supercapacitor electrode materials. Transition metal-based pseudocapacitors (PCs) have been utilized to achieve higher performance by boosting capacitance through Faradaic reversible redox reaction. This study demonstrates enhanced supercapacitor performance using nanostructured ceria and cobalt oxide active materials, with high conductivity and stable reversible oxidation states, leading to improved capacitance and stability.
APPLIED SURFACE SCIENCE
(2023)
Article
Energy & Fuels
T. Nandagopal, G. Balaji, S. Vadivel
Summary: The efficiency of a supercapacitor heavily relies on the materials used to create its electrodes. Transition metal molybdates have attracted interest due to their physicochemical properties for electrode materials in supercapacitors. Monodisperse CoMoO4 nanorods were synthesized on reduced graphene oxide nanosheets, showing exceptional electrochemical properties compared to pure CoMoO4 in an alkaline electrolyte.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Physics, Applied
Jhilmil Swapnalin, Bhargavi Koneru, Ramyakrishna Pothu, Prasun Banerjee, Rajender Boddula, Ahmed Bahgat Radwan, Noora Al-Qahtani
Summary: Surface modification of Ti3C2Tx improves its charge storage mechanism as an electrode material. The role of surface terminals and heteroatoms in the electrochemical behavior of Ti3C2Tx electrodes is demonstrated. Abundant reaction sites and larger interlayer spacing help to improve the specific capacitance by nearly 2.5 times without sacrificing the conductivity and accordion-like structure of Ti3C2Tx MXene.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Ceramics
Muhammad Aadil, Muhammad Farooq Warsi, Philips O. Agboola, Mohamed F. Aly Aboud, Imran Shakir
Summary: A novel Co3O4/r-GO nanocomposite electrode material with higher specific capacitance, good rate capability, and excellent cycle performance has been prepared for electrochemical applications. The electrode shows a high specific capacitance of 865 Fg(-1) @ 1 Ag-1 and exceptional cycling stability with 93.2% retention after 5000 cycles, making it a promising candidate as an anode material for practical applications in the electrochemical capacitor.
CERAMICS INTERNATIONAL
(2021)
Review
Electrochemistry
Shruti Suriyakumar, Preetam Bhardwaj, Andrews Nirmala Grace, A. Manuel Stephan
Summary: In the modern era, the significance of supercapacitor devices in power applications is increasing due to their outstanding capacitive performance. By exploring high-performing polymeric materials, especially in the electrode part, such as conducting polymer-based composite materials, the specific capacitance and cycling stability of the system can be significantly improved.
BATTERIES & SUPERCAPS
(2021)
Article
Chemistry, Analytical
T. Nandagopal, G. Balaji, S. Vadivel
Summary: NiMoO4 electrode materials were prepared via a hydrothermal route and optimized with the addition of rGO to improve the capacitive performance of supercapacitors. The NiMoO4/rGO composite exhibited a specific capacitance of 2056 Fg-1 at a current density of 2 Ag-1, surpassing standard NiMoO4 (788 Fg-1) at the same current density. After 1000 charge/discharge cycles, NiMoO4/rGO retained 91.1% of its initial capacitance. NiMoO4/rGO composites can be used in asymmetric supercapacitors, offering high power density (60.2 Whkg-1) and energy density (750.5 Whkg-1) when used as the positive electrode.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Physics, Condensed Matter
Sumitra Nongthombam, Soumyadeep Laha, Bibhu P. Swain
Summary: Reduced graphene oxide/silicon carbide (rGO/SiC) nanocomposites (NCs) were synthesized by a chemical method with different SiC contents. The successful formation of rGO/SiC NCs was confirmed by XRD and FTIR analysis. The rGO/SiC NCs exhibited non-linear electrical behavior, which improved the mobility and provided high specific capacitance. The hybrid nature of the rGO/SiC electrode material was also demonstrated. These findings suggest that rGO/SiC NCs are promising electrode materials for next-generation supercapacitors.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Environmental Sciences
N. Ramesh Reddy, P. Mohan Reddy, T. K. Mandal, Kakarla Raghava Reddy, Nagaraj P. Shetti, Tawfik A. Saleh, Sang Woo Joo, Tejraj M. Aminabhavi
Summary: A novel Co3O4 nanocubes-NiO octahedral structured composite was successfully synthesized via a facile one-step calcination process, showing high specific capacitance and cycling stability, with good capacity retention at higher current densities.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Chemistry, Physical
Qianlan Ke, Yuhui Zhang, Yuanheng Fu, Chenxi Yang, Fan Wu, Zhongxiu Li, Yi Wei, Kun Zhang
Summary: In this study, we investigated the electrochemical performance of a carbon fabric-based supercapacitor coated with MnOx@rGO nanohybrids using a simple one-step hydrothermal method. The effect of the mass ratio of MnOx to rGO on the electrochemical properties was studied. It was found that the supercapacitor with a mass ratio of 0.8:1 for MnO@rGO exhibited a specific capacitance of 831.25 mF cm(-2) at a current density of 0.1 mA cm(-2) when loaded with 5.40 mg cm(-2) of MnO@rGO nanohybrids on carbon fabric. Furthermore, it showed a long-term cycling capacitance retention of 97.2% after 10,000 charge-discharge cycles at a current density of 0.4 mA cm(-2). The high electrochemical performance is speculated to be attributed to the strong interfacial bonding between the hierarchical architecture of MnO@rGO nanohybrids and carbon fabric.
Article
Nanoscience & Nanotechnology
Yakun Deng, Youjun Zhao, Kangliang Peng, Lixin Yu
Summary: A one-step hydrothermal method was used to successfully prepare MoO2/MoS2 nanocomposites with excellent electrochemical performance. By adjusting the ratio of Mo to S source, materials with different compositions and structures were obtained. The resulting nanocomposites exhibited high specific capacitance and good cycle performance, making them promising for advanced energy storage applications.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Biochemistry & Molecular Biology
Jiaojiao Zheng, Bing Yan, Li Feng, Qian Zhang, Jingquan Han, Chunmei Zhang, Weisen Yang, Shaohua Jiang, Shuijian He
Summary: This study prepared carbon-based self-supporting electrode materials with graphene nanosheets grown on aluminum foil by combining hydrothermal reaction and one-step chemical vapor deposition method. It was found that the increase in concentration of the reaction solution resulted in denser and more compact nanosheets. The CNS-120 showed a capacitance retention rate of 96.35% after 5000 cycles. Additionally, the CNS-120 achieved an energy density of 0.3 mu Wh cm(-2) at a power density of 4204 mu W cm(-2). This work provides a simple method to prepare carbon-based self-supporting materials using low-cost aluminum foil and demonstrates their potential for realistic application of supercapacitors.
Article
Energy & Fuels
Aravindha Raja Selvaraj, Iruthayapandi Selestin Raja, Deviprasath Chinnadurai, Rajmohan Rajendiran, Inho Cho, Dong-Wook Han, Kandasamy Prabakar
Summary: The fabrication of high-performance supercapacitors using carbon nanofibers, manganese dioxide, and reduced graphene oxide through electrospinning process shows significant enhancement in specific capacitance and energy density.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Physical
Malarkodi Duraivel, Saravanan Nagappan, Kang Hyun Park, Kandasamy Prabakar
Summary: Halloysite nanotubes (HNT) are naturally occurring one-dimensional porous clay minerals with hydroxyl functional groups suitable for O2 evolution reaction. Coating HNT-based electrocatalyst on Ni foam substrate shows excellent water oxidation activity and stability in alkaline electrolyte solution.
APPLIED CLAY SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Iruthayapandi Selestin Raja, Seok Hyun Lee, Moon Sung Kang, Suong-Hyu Hyon, Aravindha Raja Selvaraj, Kandasamy Prabakar, Dong-Wook Han
Summary: Wettability has a greater influence on cellular behaviors on nanofibrous scaffolds compared to surface morphology.
MATERIALS & DESIGN
(2022)
Article
Electrochemistry
Kai Chen, Rajmohan Rajendiran, Chinnadurai Deviprasath, Sobin Mathew, Young-Rae Cho, Kandasamy Prabakar, Oi Lun Li
Summary: Alkaline water electrolysis is an attractive hydrogen generation technology that produces high purity hydrogen with zero carbon emissions. However, the slow kinetics of oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) limit its applications. By optimizing the catalyst structure and conductivity, the reaction rates and conductivity can be significantly improved.
Article
Electrochemistry
Deviprasath Chinnadurai, Nandapriya Manivelan, Kandasamy Prabakar
Summary: A low-cost copper sulfide bifunctional electrocatalyst with silver doping was synthesized and its intrinsic catalytic activity was modulated, achieving a relatively low cell voltage and higher intrinsic activity.
Review
Chemistry, Multidisciplinary
Rajangam Vinodh, Rajendran Suresh Babu, Sangaraju Sambasivam, Chandu V. V. Muralee Gopi, Salem Alzahmi, Hee-Je Kim, Ana Lucia Ferreira de Barros, Ihab M. Obaidat
Summary: Supercapacitors, with their excellent capacitance and rate efficiency, extended durability, and cheap materials price, are regarded as one of the most promising energy storage devices. The choice of electrode materials is critical for the performance of supercapacitors. The combination of polyaniline (PANI) and metal-organic frameworks (MOFs) as electrode materials shows additional benefits and is predicted to be the next-generation electrode materials for efficient supercapacitors.
Article
Computer Science, Information Systems
Min-Soo Kim, Do-Hyun Kim, Hee-Je Kim, Kandasamy Prabakar
Summary: In this paper, a novel strategy for monitoring PV junction boxes based on LoRa technology is proposed. The wireless transmission of data collected from the PV junction boxes enables real-time monitoring and display of the received data on an LCD screen. The system shows stable communication reception and excellent performance in maintaining signal strength and packet error rate, even in non-line-of-sight environments.
Article
Nanoscience & Nanotechnology
Nandapriya Manivelan, Senthil Karuppanan, Kandasamy Prabakar
Summary: This study proposes a copper sulfide-coupled cobalt sulfide nanosheets electrocatalyst for hydrogen and oxygen evolution reactions. The catalyst exhibits excellent HER and OER activity with lower overpotentials. The Cu2-xS/Co structure with a hybrid CoS-CoS2 interface and Co2+ active sites on the surface enables lower potential requirements. The full-cell system achieves high current density at low potential and shows good stability.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Malarkodi Duraivel, Saravanan Nagappan, Kang Hyun Park, Chang-Sik Ha, Kandasamy Prabakar
Summary: An efficient transition metal oxy/hydroxides functionalized halloysite nanotubes-based hydrogen evolution reaction electrocatalyst was fabricated on flexible carbon cloth. The Co(OH)2@HNT/CC showed excellent HER performance in alkaline electrolyte. The hierarchical structure and surface hydroxyl groups of halloysite nanotubes contribute to the enhanced electrocatalytic activity.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Jeygeerthika Reddy, Malarkodi Duraivel, Karuppanan Senthil, Kandasamy Prabakar
Summary: Research on cobalt-based bimetallic hydroxides has shown promising electrocatalytic effects for oxygen and hydrogen evolution reactions, potentially replacing noble metals. The incorporation of manganese into cobalt hydroxide matrix increases surface area and enhances electrocatalytic activity. The best HER and OER two-electrode electrolyzers exhibit excellent performance in alkaline electrolyte.
Article
Electrochemistry
Malarkodi Duraivel, Saravanan Nagappan, Kang Hyun Park, Kandasamy Prabakar
Summary: This study reports the use of NiMn layered double hydroxide (LDH) grown hydrothermally on nickel foam substrate for water splitting application. The Ni3+/Ni2+ and Mn3+/Mn2+ ratios are tuned to enhance the active sites for oxygen evolution reaction (OER) and hydrogen evolution reaction (HER).
Article
Green & Sustainable Science & Technology
Malarkodi Duraivel, Saravanan Nagappan, Kandasamy Prabakar
Summary: The study shows that NO3- intercalation alters the surface and electronic structure of the iron hydrogen phosphate catalyst, thereby enhancing the oxygen evolution reaction and hydrogen evolution reaction. This intercalation enhances the wetting properties of the catalyst and improves the contact between the electrode and electrolyte, leading to enhanced mass transfer capability.
Article
Electrochemistry
Malarkodi Duraivel, Saravanan Nagappan, Jeygeerthika Reddy, Kang Hyun Park, Kandasamy Prabakar
Summary: Hydrogen production via electrochemical water splitting is achieved by using composition tuned binary NiMn oxides and manganese oxide-modified nickel oxide nanosheets, which provide excellent bifunctional electrocatalytic properties for overall water splitting. The synergistic interaction between Ni3+ and Jahn-Teller active Mn3+ facilitates O-O bond formation, while the higher Mn3+ and NiO active sites promote OH- adsorption and accelerate the OER reaction.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Multidisciplinary
Peer Mohamed Sanjitha Banu, Johnson Henry, Ganesan Sivakumar, Kandasamy Prabakar, Kannusamy Mohanraj
Summary: In this study, p-type to n-type conversion in Fe-doped Cu2BaSnS4 (CBTS) nanoparticles synthesized via a hydrothermal process is reported. The increase in doping concentrations resulted in an increased band gap and decreased particle size. During the conversion, the electron donor concentration increased, leading to an enhancement in conductivity. This conversion process and the optimized charge carrier concentration resulted in an increased photo conversion efficiency.
NEW JOURNAL OF CHEMISTRY
(2023)
