Article
Electrochemistry
Yujuan Chen, Yuyang Jiang, Zhaoen Liu, Lifang Yang, Quanzhou Du, Kelei Zhuo
Summary: By synthesizing urea phosphate-derived graphene aerogel (UPGA) with good wettability through one-step hydrothermal treatment of graphene oxide (GO) and urea phosphate (UP), the UPGA exhibits high specific capacitance, excellent energy density, and cycling stability, showing great potential as an electrode material in supercapacitors.
ELECTROCHIMICA ACTA
(2021)
Article
Electrochemistry
Lifang Yang, Kelei Zhuo, Xiaochao Xu, Zezhong Zhang, Quanzhou Du, Guangyue Bai, Jianji Wang
Summary: The novel electrode material DHAQ-NGA serves as both the negative and positive electrode materials in an ionic liquid electrolyte, improving capacity through faradaic reactions and stability through intramolecular hydrogen bonding, resulting in an enhanced specific capacity.
ELECTROCHIMICA ACTA
(2021)
Article
Energy & Fuels
Songlin Xue, Piao Zhang, Bin Liu, Jin Liu, Qiong Yan, Hongfei Pan, Wenmao Tu, Haining Zhang
Summary: In this study, iodine/nitrogen co-doped three-dimensional reduced graphene oxide (PGr) was synthesized using a soaking-drying process and subsequent calcination. The obtained PGr exhibited a highly interconnected three-dimensional hierarchically porous network and a high specific surface area, showing exceptional electrical conductivity and excellent capacitive characteristics. It demonstrated a high gravimetric specific capacitance in a three-electrode system and a high specific energy density in a symmetric supercapacitor.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Engineering, Environmental
Li Sun, Xiao Su, Yujuan Chen, Kelei Zhuo, Huanhuan Li, Dong Sun, Jianji Wang
Summary: In this work, a unique MXene/TiO2-graphene aerogel composite with a 3D hierarchical porous framework was developed, assisted by ferric ions. The composite exhibited a large specific surface area and amorphous TiO2 on the surface of MXene nanosheets. The amorphous TiO2 contributed to pseudocapacitance through reversible redox reactions with lithium ions, and the variable valence states of ferric cations also provided pseudocapacitance. The study also formulated a trinary ionic liquid-based electrolyte with a wide electrochemical stability potential window to match the new material.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Electrochemistry
Li Sun, Yujuan Chen, Kelei Zhuo, Dong Sun, Jianming Liu, Jianji Wang
Summary: In this study, a nitrogen-doped Ti3C2Tx-reduced graphene oxide (N-Ti3C2Tx/TiO2-RGO) hybrid material was successfully prepared and matched with a ternary mixed electrolyte. The hybrid material exhibited a 3D cross-linked porous structure for efficient ion transport, while the electrolyte provided a wide electrochemical stability window for redox reactions. The assembled supercapacitor showed enhanced specific capacitance and high energy density at a high-power density.
ELECTROCHIMICA ACTA
(2023)
Article
Engineering, Environmental
Rumeng Feng, Yujuan Chen, Lifang Yang, Quanzhou Du, Kelei Zhuo
Summary: In this study, an ethyl viologen-functionalized reduced graphene oxide composite (EV-RGO) was synthesized by one-step hydrothermal method. The ethyl viologen cations are anchored on the RGO sheets through different interactions, making EV-RGO more stable and reversible as an electrode material. The presence of viologen cations with ethyl groups effectively suppresses the stacking of RGO sheets and expands their interlayer spacing. In an ethyl-methylimidazolium tetrafluoroborate ionic liquid electrolyte, the electrochemical performance of EV-RGO is enhanced due to the synergistic contributions of electric double-layer capacitance and pseudocapacitance. The specific capacitance of EV-RGO as a negative electrode material for supercapacitors reaches 222.7 F g(-1) at a current density of 0.5 A g(-1). An asymmetric supercapacitor device (EVRGO//AC ASC) exhibits an energy density of 64.1 Wh kg(-1) at a power density of 888 W kg(-1). This work offers an advanced strategy for fabricating high-performance supercapacitors using organic molecule-modified graphene composites.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Hua Li, Xiaodong Hu, Chunfeng Wang, Yujuan Chen, Kelei Zhuo, Jianji Wang
Summary: In this study, an IL-rGA material was prepared using hydrothermal reduction and modification tactics with the assistance of an ionic liquid. The IL-rGA material, with its porous texture and modified surface, enables rapid infiltration and sufficient adsorption of electrolyte ions, resulting in a significant improvement in specific capacitance. By using this material and a specific IL electrolyte, high energy density and power density supercapacitors can be achieved, meeting the requirements of a wider range of electrical facilities.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Feng Su, Shuanghao Zheng, Fangyan Liu, Xiong Zhang, Fangyuan Su, Zhong-Shuai Wu
Summary: NHGNSs are prepared through a simple method, exhibiting high specific capacitance and excellent rate capability, showing great potential for supercapacitor application.
CHINESE CHEMICAL LETTERS
(2021)
Article
Energy & Fuels
S. Suresh Balaji, M. Sandhiya, M. Sathish
Summary: Heteroatom doped graphene framework shows promising potential for electrochemical hybrid supercapacitor applications. P-doped graphene synthesized using sodium phosphate showed high specific capacitance and capacitance retention, with further enhancements observed after incorporation of KI with H2SO4 electrolyte. The specific energy of symmetric supercapacitor with KI/H2SO4 electrolyte was significantly higher than that with H2SO4 electrolyte.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Chemistry, Multidisciplinary
Srinivasan Suresh Vivekanand, Srinivasan Suresh Balaji, Kabeer Nasrin, Marappan Sathish
Summary: In this study, Se-doped graphene was synthesized using supercritical fluid technique and characterized by XPS and EDAX. The Se-doped graphene exhibited a gravimetric capacitance of 581 F g(-1) in 1 M H2SO4 solution and a specific capacitance of 420 C g(-1) in 0.01 M ammonium metavanadate solution in 1 M H2SO4. The Se-doped graphene symmetric supercapacitor showed an improved capacitance retention of 85% over 50000 cycles and a coulombic efficiency of 94%. The energy density of the Se-doped graphene symmetric supercapacitor reached 23.33 Wh kg(-1) in 0.01 M ammonium metavanadate solution in 1 M H2SO4 solution.
Article
Chemistry, Physical
Wenqiang Wang, Wenyi Zhang, Gengchao Wang, Chunzhong Li
Summary: A new method was reported for controllably preparing sulfur and nitrogen-doped graphene foam with high specific surface area and excellent capacitance performance. By utilizing graphite paper as both the deposition substrate and an in situ microwave reduction initiator, interdigital electrodes were facilely obtained, leading to a flexible supercapacitor with high energy density and cycling stability. This study provides an ideal flow process for constructing a graphene self-standing architecture with potential applications in catalysis, energy storage, and environmental protection.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Physical
Yue Sun, Shan Xue, Jinhua Sun, Xingxing Li, Yuchen Ou, Baohuan Zhu, Muslum Demir
Summary: Supercapacitors are attracting attention in energy storage fields due to their safety, cost-effectiveness, and environmental friendliness. Pore carbon materials derived from renewable biomass materials are important and cost-effective electrode materials for supercapacitors. However, the low ionic conductivity of biomass materials limits their electrochemical performance. This study introduces an immiscible liquid-mediated method to improve the ionic conductivity of silk-derived nitrogen-doped porous carbon electrodes. The addition of organic liquid promotes ion transport in the electrode pores, resulting in a specific capacitance of 565.3 F g-1 at a current density.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Rodolfo Morales Ibarra, Motonobu Goto, Juan Garcia-Serna, Saida Mayela Garcia Montes
Summary: Graphene, an unconventional material, has exceptional properties and novel synthesis methods are being developed; researchers effectively exfoliated graphene from graphite using supercritical fluids and characterized its morphology and structure, showing promise for large-scale graphene production.
Article
Materials Science, Multidisciplinary
Sheng Zhu, Fei Zhang, Hai-Gang Lu, Jian Sheng, Lina Wang, Si-Dian Li, Gaoyi Han, Yan Li
Summary: A novel structured graphene, named flash nitrogen-doped graphene (FNG), has been synthesized using a solvent-and catalyst-free flash Joule heating method. FNG features high graphitization with a turbostratic structure and exhibits high surface-area-normalized capacitance and exceptional rate capability. It also demonstrates desirable cyclic stability, making it a promising candidate for high-performance supercapacitors.
ACS MATERIALS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Hangtian Zhu, Yafei An, Minjie Shi, Ziqi Li, Nianting Chen, Cheng Yang, Peng Xiao
Summary: In this study, a novel MnO2/PNC electrode with superior electrochemical performance in IL electrolyte was developed, showcasing large specific capacitance, remarkable rate capability, and favorable electrochemical kinetics.
Review
Chemistry, Multidisciplinary
Kabeer Nasrin, Vasudevan Sudharshan, Kaipannan Subramani, Marappan Sathish
Summary: This review investigates the material design and electrochemical performance of 2D/2D MXene heterostructures for supercapacitors. The synthesis and energy storage properties of MXene are discussed, along with different preparation methods and the synergistic enhancement of MXene with other materials. Future research directions, including fundamental mechanism investigations and material optimizations, are outlined.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
S. Jayachitra, P. Ravi, P. Murugan, M. Sathish
Summary: Topological insulators have attracted significant attention in photocatalytic water splitting, and Bi2Se3, with its unique properties, has been successfully exfoliated into few-layer nanosheets to enhance the photocatalytic activity when composited with TiO2 nanoparticles. The improved hydrogen evolution rate and photostability of the Bi2Se3/TiO2 nanocomposite suggest its promising potential for photocatalytic hydrogen production.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Kaipannan Subramani, Shanmugam Shunmugasundaram, Velu Duraisamy, Rajaji Ilavarasi, Sakkarapalayam Murugesan Senthil Kumar, Marappan Sathish
Summary: Porous carbon materials are considered as a proficient impetus for enhancing supercapacitor performance due to their high surface area and meso/microporous traits. Dual heteroatom doping (such as nitrogen and boron) can further improve the activity of the material, resulting in excellent rate capability and capacitance retention.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
M. Priyadharshini, M. Sandhiya, M. Sathish, T. Pazhanivel, G. Mani, Asma A. Alothman, Khadraa N. Alqahtani
Summary: Ni2P2O7 prepared using a soft template method showed enhanced electrochemical performance by adding different surfactants, leading to improved specific capacitance and cycling stability.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Kabeer Nasrin, Vasudevan Sudharshan, Kaipannan Subramani, Manickavasakam Karnan, Marappan Sathish
Summary: A scalable synthesis method for 2D/2D MXene/BCN heterostructure through no residue direct pyrolysis is reported in this study, offering high pseudocapacitive activity and impressive stability by removing terminal groups at elevated temperature. This method shows promise as a convenient solution for energy storage applications in the future.
Article
Agricultural Engineering
Shivam Rawat, T. Boobalan, M. Sathish, Srinivas Hotha, Bhaskar Thallada
Summary: Biochar prepared from litchi seeds was used to fabricate supercapacitor electrodes. The activated biochar showed a specific capacitance of 493 F g-1, significantly higher than the initial capacitance of 190 F g-1. The activated biochar supercapacitor exhibited excellent cyclic stability with capacitance retention above 90% after 10,000 charge-discharge cycles.
BIOMASS & BIOENERGY
(2023)
Article
Chemistry, Multidisciplinary
Srinivasan Suresh Vivekanand, Srinivasan Suresh Balaji, Kabeer Nasrin, Marappan Sathish
Summary: In this study, Se-doped graphene was synthesized using supercritical fluid technique and characterized by XPS and EDAX. The Se-doped graphene exhibited a gravimetric capacitance of 581 F g(-1) in 1 M H2SO4 solution and a specific capacitance of 420 C g(-1) in 0.01 M ammonium metavanadate solution in 1 M H2SO4. The Se-doped graphene symmetric supercapacitor showed an improved capacitance retention of 85% over 50000 cycles and a coulombic efficiency of 94%. The energy density of the Se-doped graphene symmetric supercapacitor reached 23.33 Wh kg(-1) in 0.01 M ammonium metavanadate solution in 1 M H2SO4 solution.
Article
Energy & Fuels
Bebin Ambrose, Kabeer Nasrin, Murugesan Arunkumar, Arthy Kannan, Marappan Sathish, Murugavel Kathiresan
Summary: Supercapacitor devices have become increasingly important in energy storage applications due to their excellent power density, quick charging/discharging capabilities, and long cycle ability. This study focuses on the synthesis of two different viologen-based covalent organic polymers (COPs) with hollow sphere and hollow tube morphologies, which show improved stability and enhanced performance compared to traditional polymer electrodes. One of the COPs, COP-2, exhibits remarkable electrochemical performance and exceptional stability with 100% capacitance retention after 50,000 cycles.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Engineering, Environmental
K. Nasrin, M. Arunkumar, N. Koushik Kumar, V. Sudharshan, S. Rajasekar, D. Mukhilan, M. Arshad, M. Sathish
Summary: This research demonstrates the ability to store energy in a hetero-assembly of two-dimensional materials, reduced graphene oxide (rGO) and Nb2C MXene, through dual N doping on both lattices using the supercritical fluid processing method. The engineered hetero-assembly, N-(Nb2C/rGO), exhibits outstanding electrochemical performance with high specific capacitance and admirable energy density in aqueous and non-aqueous electrolytes. Additionally, the capacitance retention remains close to 100% after multiple cycles of charging and discharging in a quasi-solid-state electrolyte. This study provides insights into the modulation of energy storage ability and the design of high-performance electrode materials for supercapacitors.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Multidisciplinary
K. P. Annamalai, S. Gokulnath, T. Boobalan, M. Sathish
Summary: The energy density of solid-state electrochemical energy storage devices can be increased by constructing indigenous Sn doped nickel dichalcogenides nanosheets with tunable composition.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
P. Ravi, K. Dinesh Kumar, V. N. Rao, M. V. Shankar, M. Sathish
Summary: The key to achieving a stable and efficient photocatalyst for continuous hydrogen production is to steer photo excitons through interface engineering of semiconductor photocatalysts. Binary nanocomposites, with advantages such as larger surface area, effective light harvesting, improved photoexcitons separation, and non-corrosiveness, have gained special attention. In this study, a nanocomposite of metallic TaN nanoparticles attached with a TiO2 layer was successfully synthesized using hydrothermal method. The analysis revealed the formation of metallic TaN wrapped with irregular spherical TiO2 morphology. The TaN plays a key role in boosting photocatalytic activity by promoting the separation and transfer of photoexcitons.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Green & Sustainable Science & Technology
Subramani Prakash, Murugesan Sandhiya, Jawaharali Kamarsamam, Mahadevan Ganesan, Marappan Sathish
Summary: This study focuses on customizing spent LiB anodes into high-performance supercapacitor electrodes via supercritical water exfoliation, with a significant improvement in electrochemical performance and energy density after the addition of dopamine. This processing method offers a solution to the recycling of spent LiBs.
ADVANCED SUSTAINABLE SYSTEMS
(2023)
Article
Chemistry, Physical
Nadar Allwyn, Bebin Ambrose, Murugavel Kathiresan, Marappan Sathish
Summary: Diversity in electrocatalysis and energy storage is crucial in addressing energy and ecological issues. This study introduces a self-sacrificial viologen-based covalent triazine polymer template for the production of nitrogen-doped carbon, eliminating the need for time-consuming postdoping processes. The resulting carbon material exhibits excellent capability for oxygen reduction reaction and shows promising performance in zinc-air batteries, demonstrating outstanding durability and specific capacity value nearing the theoretical value.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
M. Sandhiya, D. Ponraj Jenis, V. Sudha, S. M. Senthil Kumar, R. Thangamuthu, M. Sathish
Summary: Using acetaminophen as a redox additive with H2SO4, the energy density of supercapacitor electrodes can be increased. The reversible redox process of acetaminophen enhances the electrochemical performance of the supercapacitor electrodes and increases the ionic conductivity of PVA/H2SO4 gel electrolyte, resulting in excellent energy density of the flexible supercapacitor.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Nanoscience & Nanotechnology
Kabeer Nasrin, Vasudevan Sudharshan, Murugesan Arunkumar, Marappan Sathish
Summary: This study unveils a synergistically in situ prepared 2D/2D Nb2C/Ti3C2 MXene heterointerface nanoarchitecture, which delivers excellent specific capacitance and energy density, along with superior cycling retention.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Katerina Skopalova, Itana Nusa Bubanja, Dragomir Stanisavljev, Nikola Cvjeticanin, Vera Kasparkova, Eliska Dad'ova, Erika Pavlikova, Marek Koutny, Marija Gizdavic-Nikolaidis, Petr Humpolicek
Summary: This study compares the biological properties of PANI prepared by different synthesis methods and oxidizing agents, which improves its potential applications in the biomedical field.
Article
Materials Science, Multidisciplinary
Hui-Ping Li, Cai-Yan Gao, Zhi-Ping Chen, Xin-Heng Fan, Lian-Ming Yang
Summary: In this study, a novel type of D-A non-fused-ring copolymers was designed and synthesized to overcome the trade-off relationship between electrical conductivity and Seebeck coefficient in organic semiconductors. The incorporation of fluorine atoms into the polymer backbone effectively increased the ordered degree of molecular stacking and improved both the electrical conductivity and Seebeck coefficient. The bimodal orientation of polymers played a crucial role in decoupling the correlation between electrical conductivity and Seebeck coefficient.
Article
Materials Science, Multidisciplinary
Mansour A. S. Salem, Amjad Mumtaz Khan, Hatem A. M. Saleh, Khalil M. A. Qasem, Mizna Ahmed, Aadil Shafi Bhat, Abdulaziz Abdullah Qasem Ali, Younes S. A. Ghanem, Ali Alrabie, Abdel-Basit Al-Odayni, Waseem Sharaf Saeed, Basheer Al-Anesi
Summary: This research focuses on the versatile substance, polyaniline/layered double hydroxide (PANI@Nd-Co/LDH), under solvothermal conditions. A thorough analysis of its structure and morphology was conducted using various analytical methods. The findings showed that PANI@Nd-Co/LDH exhibited highly sensitive and specific fluorescence detection of Pb(II) and Al(III), outperforming other heavy metal ions. The sensor demonstrated a turn-off fluorescence response for Pb(II) ions and a turn-on fluorescence response for Al(III) ions. The minimum detectable limits (MDL) were determined to be 9.6 nM for Pb(II) and 220 nM for Al(III). PANI@Nd-Co/LDH could be easily regenerated and reused for multiple cycles. The detection mechanisms involved the inner filter effect (IFE) for Pb(II) and the chelation-enhanced fluorescence (CHEF) effect for Al(III). These results highlight the excellent potential of PANI@Nd-Co/LDH in the detection and recognition of Pb(II) and Al(III) ions.