Article
Energy & Fuels
Rafael Vicentini, Willian G. Nunes, Lenon H. da Costa, Leonardo M. Da Silva, Bruno Freitas, Aline M. Pascon, Otavio Vilas-Boas, Hudson Zanin
Summary: A novel multi-walled carbon nanotubes and activated carbon composite material was reported as an electrode for electrochemical capacitors, showing low equivalent series resistance and operational stability in aqueous electrolytes. The simple, fast, and low-cost approach resulted in devices with high voltage and specific capacitance, demonstrating good cyclability and potential for environmentally friendly electrolytes.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Chemistry, Multidisciplinary
Jun Zhou, Yuying Zheng, Dongyang Chen
Summary: By using a reduction-reaction-induced self-assembly process, a new type of three-dimensional porous aerogel with partially unzipped multiwalled carbon nanotubes inserted into graphene nanosheets was prepared. The aerogels exhibited excellent electrical contact, prevented restacking of graphene nanosheets, and provided large channels for charge transfer, resulting in promising electrode materials for supercapacitor applications.
Article
Materials Science, Multidisciplinary
Yaqi Chen, Lifen Tong, Guo Lin, Xiaobo Liu
Summary: In this study, SWCNTs/phthalocyanine polymer composite derived self-nitrogen-doped graphene-like porous carbon (SPCM) was synthesized through a simple solution blending and mechanical stirring method. The SPCM showed high specific capacitance and excellent stability as an electrode material for supercapacitors.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Hsin-Ju Lo, Man-Chen Huang, Yong-Hong Lai, Hsun-Yi Chen
Summary: These studies demonstrate that the Ni(OH)(2)-rGO supercapacitor with lithium-ion GPE can bi-functionally serve as either a battery-like or capacitor-like device, with high specific capacity, energy, and power characteristics.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Energy & Fuels
Wenhao Peng, Zilong Su, Jiajun Wang, Shuji Li, Kaixuan Chen, Ningning Song, Shiping Luo, Aijuan Xie
Summary: Spherical MnCoOx and MnCoOx-multi-walled carbon nanotubes (MnCoOx-MWCNTs) composites were synthesized and used as electrode materials for supercapacitors. The properties of different MnCoOx samples with various Co/Mn molar ratios and MnCoOx-MWCNTs samples with different MWCNTs qualities were evaluated using various electrochemical test methods. The results showed that the MnCoOx-MWCNTs composite with a Co/Mn molar ratio of 1:1 and 0.1 g MWCNTs exhibited a high discharge capacitance of 930.00 F g(-1) at a current density of 1.0 A g(-1). The specific capacitance retention rate of the optimal MnCoOx-MWCNTs composite remained at 88.2% after 5000 cycles at a current density of 8.0 A g(-1). Therefore, the MnCoOx-MWCNTs composite shows great potential as an electrode material for supercapacitors.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Electrochemistry
Xiaodong Hong, Xu Wang, Yang Li, Changyi Deng, Bing Liang
Summary: In this study, bamboo-like carbon nanotubes were grown on potassium citrate-derived carbon nanosheets (PC-Cs) to prepare a PC-Cs/CNTs composite. The PC-Cs/CNTs were further modified with in-situ polymerization of polyaniline (PANI) to fabricate a PC-Cs/CNTs/PANI ternary composite. The optimized composite exhibited excellent electrochemical performance, including high capacitance and cycling stability.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Analytical
Xin Gao, Hengwei Zhang, Erjun Guo, Fei Yao, Zengze Wang, Hongyan Yue
Summary: The research involved the preparation of graphene oxide (GO) nanosheets and two-dimensional Ni(OH)2 with excellent uniformity using hydrothermal and Hummers methods, leading to the formation of NiO-rGO nanosheets with optimized electrochemical performance and excellent capacity. The hybrid NiO-rGO nanosheets electrode exhibited homogeneously dispersed NiO nanosheets on the surface of rGO nanosheets, delivering a capacity of 343 C/g (1 A/g) and achieving a high energy density of 5.4 Wh/kg at a power density of 0.43 kW/kg in the voltage range of 0-1.4 V. Additionally, the symmetric supercapacitor made from NiO-rGO nanosheets showed an excellent capacitance retention of 90% after 10,000 cycles at 10 A/g.
MICROCHEMICAL JOURNAL
(2021)
Article
Energy & Fuels
Anish Reghu Nath, Bharath Madhu, Ajay Mohan, N. Sandhyarani
Summary: To improve the cyclic stability of nickel sulfide/nickel hydroxide (NSH) composite, researchers have incorporated a copolymer of poly thiophene-pyrrole (cPPyTh). The resulting composite, named NCP, shows enhanced stability and specific capacity of 87 C/g at 1 A/g. In an asymmetric supercapacitor, NCP demonstrates a superior cyclic stability of over 94% for 10,000 cycles compared to NSH's stability of ~73% over 5,000 cycles.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Materials Science, Multidisciplinary
Valerii Kotok, Peter Ondrejka, Miroslav Mikolasek, Michaela Sojkova, Patrik Novak, Maros Gregor, Vadym Kovalenko, Kostyantyn Sukhyy
Summary: The self-decomposition reaction of the nickel ammonia complex was used for the formation of nickel hydroxide on nickel foam, and the formation method was modified by the addition of polyvinyl pyrrolidone (PVP) and the electrochemical or chemical activation with cobalt hydroxide. In all cases, Ni(OH)2 nanoflakes were formed, and the chemical activation process resulted in the precipitation of flower-like Co(OH)2 particles among the nanoflakes. It was found that the presence of PVP during the nickel ammonia complex decomposition suppressed the highly branched particles, leading to enhanced capacitive properties of the formed electrode at high current densities. The highest capacitance of 1408 F/g at 1 A/g was achieved for the sample precipitated with the presence of PVP and further chemical activation with cobalt.
Article
Chemistry, Physical
Jiuli Chang, Zhanqiang Hu, Jinzhou Li, Dapeng Wu, Zhaoxun Lian, Fang Xu, Kai Jiang, Zhiyong Gao
Summary: The designed NiAl layered double hydroxide-reduced graphene oxide composite as battery electrode demonstrated rapid electron/ion migrations and high accessible surface areas, resulting in high areal capacity even at increased current densities.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Applied
Milan Babu Poudel, Han Joo Kim
Summary: The successful hydrothermal synthesis of crystalline Gd-doped MnO2 nanorods combined with Ni(OH)(2) nanosheets as cathode for all-solid-state asymmetric supercapacitors showed significantly enhanced electrochemical activities. The electrode exhibited excellent specific capacity, appealing rate performance, and ultralong lifetime stability, showing great potential in developing energy storage devices.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Javad Rahimi Junaqani, Mahdi Kazazi, Mohammad Javad Shahrokhi Shahraki, Mehdi Delshad Chermahini
Summary: In this study, the pseudocapacitive performance of a Ni(OH)(2) electrode was significantly enhanced by compositing with graphene oxide (GO) with a uniform nanostructure. The as-prepared Ni(OH)(2)/GO electrode exhibited high specific capacitance and cycling stability, providing an efficient and effective way to manufacture electrode materials for energy storage devices, especially high-performance supercapacitors.
Article
Nanoscience & Nanotechnology
Zijun Shi, Xuan Xu, China Peng Jing, Baocang Liu, Jun Zhang
Summary: An inventive technique was used to produce a composite electrode consisting of a well-aligned nickel-cobalt alloy nanoparticles-encapsulated N-doped carbon nanotubes with porous structure and good conductivity as a substrate, onto which nanosheets of nickel-cobalt layered double hydroxide were grown. This composite electrode demonstrated high capacitance, long-term stability, and high Coulombic efficiency, making it a potential approach for high-performance supercapacitors.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Edmund Samuel, Ali Aldalbahi, Mohamed El-Newehy, Hany El-Hamshary, Sam S. Yoon
Summary: This study presents a facile method for the growth of beehive-like NiFe2O4 nanosheets, which can reduce electron transport distances in supercapacitor electrodes. By tuning the deposition duration, abundant energy storage sites and controlled cavities are achieved to facilitate electrolytic ion diffusion and enhance electrochemical performances. The synergistic effect of advantageous cavities and active sites in the nanosheets results in excellent stability and high capacitance retention rate after numerous charging and discharging cycles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Chemical
Yi-Hung Liu, Chi-Han Hung, Cheng-Liang Hsu
Summary: In this study, a Ni(OH)(2)/CNT/CF composite electrode was developed and characterized to investigate its electrode kinetics for enhanced urea oxidation reaction (UOR) performance. The electrode exhibited satisfactory UOR performance with higher oxidation current and lower overpotential, attributed to the active and reversible Ni2+/Ni3+ redox reaction of the composite. The inclusion of CNTs in the electrode structure led to increased reaction surface area and electrical conductivity, resulting in lower charge transfer resistance compared to conventional electrodes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Polymer Science
Di Jiang, Na Chu, Yue Zhang, Wei-Dong Wang, Fan-Long Jin, Soo-Jin Park
Summary: A silane coupling agent was used to modify the surface of expanded graphite, which was subsequently used as a thermally conductive filler to fabricate DGEBA/EG composites with high thermal conductivity. The addition of Si@EG significantly improved the thermal conductivity of the composites, but decreased the impact strength.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Physical
Hao Sun, Seul-Yi Lee, Soo-Jin Park
Summary: Photocatalytic technology is a promising alternative for water treatments, but its practical application is limited by low efficiency and selectivity. In this study, two-dimensional zinc oxide nanosheets decorated with copper-palladium bimetallic nanoparticles were synthesized for the degradation of organic dyes in water. The prepared composites showed superior photocatalytic performance compared to pristine ZnO nanosheets under visible-light irradiation, attributed to enhanced separation and transfer efficiency of charge carriers. The highest catalytic efficiency was achieved by CuPd/ZnO nanocomposite with 0.5 wt% CuPd, achieving 95.3% removal of methyl orange within 45 minutes. This study provides a new avenue for the design and fabrication of high-performance photocatalysts for water treatments.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Multidisciplinary Sciences
Yasser Zare, Kyong Yop Rhee, Soo-Jin Park
Summary: This study presents a power equation for the conductivity of graphene-based polymer composites based on the tunneling length, interphase deepness, and filler size. The study also explores the impact of these factors on the effective concentration and percolation beginning of graphene nano-sheets in nanocomposites. The developed equations are validated using experimental data and provide estimations for interphase depth, tunneling size, and percolation exponent.
SCIENTIFIC REPORTS
(2023)
Review
Chemistry, Analytical
Ali Mohammadpour-Haratbar, Seyyed Behnam Abdollahi Boraei, Yasser Zare, Kyong Yop Rhee, Soo-Jin Park
Summary: Breast cancer is the second most common cancer in the world, and various biosensor strategies, including electrochemical biosensors, have been studied for its recognition. Graphene-based electrochemical biosensors have received increasing attention due to their outstanding mechanical and electrical performances. This review examines the latest advances in graphene-based electrochemical biosensors for breast cancer biosensing, analyzing the detection limit, linear range, and diagnosis techniques for each biosensor, discussing prospects, challenges, and potential strategies for enhancing their performance.
Article
Chemistry, Physical
Kugalur Shanmugam Ranjith, Seul-Yi Lee, Seyed Majid Ghoreishian, Nilesh R. Chodankar, Ganji Seeta Rama Raju, Swati J. Patil, Yun Suk Huh, Soo-Jin Park, Young-Kyu Han
Summary: Defect and interface engineering can significantly improve the electrochemical performance of heterostructured electrode materials, as shown in this study on MXene nanosheets-tagged heteroatom-doped graphitic carbons wrapped CoSe2. The composites exhibit excellent performances in hydrogen evolution reaction and supercapacitor applications, with high specific capacity and energy density, as well as superior stability.
Article
Environmental Sciences
Urooj Kamran, Seul-Yi Lee, Kyong Yop Rhee, Soo-Jin Park
Summary: In this study, sustainable nanocomposites were successfully prepared from agriculture waste (rice husk)-derived biochar precursor, and loaded with nickel-doped, base-treated titanium dioxide nanomaterials for efficient lead (Pb2+) removal from aqueous media. The optimized sample (Ni0.01@Na-TiO2/BC) exhibited a high Pb2+ adsorption capability of 122.3 mg g(-1) under the optimum adsorption conditions, attributed to its specific surface area and excess functional sites. The kinetic and isothermal examinations showed that the adsorption of Pb2+ followed pseudo 2nd order and Langmuir models. Furthermore, the optimized sample demonstrated superior adsorption selectivity for Pb2+ ions in a multi-metallic system compared to other ions.
Article
Engineering, Manufacturing
Yinhang Zhang, Bin Ye, Gang Zhou, Ling Li, Wenhui Geng, Lei Yao, Fei Zhang, Junwen Xie, Soo-Jin Park, Zhi Yang, Chengzhe Huang
Summary: In this study, carbon nanotubes were intercalated into oriented graphite nanoplatelets to construct conductive networks for multifunctional thermal management materials. The composite film exhibited high in-plane thermal conductivities and remarkable electrothermal and electromagnetic interference (EMI) shielding performances. It showed a temperature of 140 degrees C under an external voltage of 4V and an electromagnetic interference shielding effectiveness of 2537 dB cm^-1.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Chemistry, Physical
Meiying Cui, Li Wei, Soo-Jin Park, Seok Kim
Summary: To increase the capacitance of an inorganic electrode material, CoFe-layered double hydroxide (LDH) was grafted onto the surface of hexagonal-flower-like NiCo2O4. Various composites with different Co/Fe ratios were grown directly on Ni foam using the hydrothermal method. The composite with a Co/Fe molar ratio of 1:2 (NiCo2O4 @Co1Fe2-LDH) exhibited the best electrochemical performance, with a specific capacitance of 2595 F g-1 at a current density of 1 A g-1. The composite prevented aggregation of CoFe-LDH, leading to high specific capacitance and good stability. The electrode was used in a packaging asymmetric capacitor, resulting in a maximum energy density of 27.33 Wh kg-1 at a power density of 800 W kg-1 and an excellent capacitive retention of 96% even after 5000 charge-discharge cycles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Multidisciplinary Sciences
Mostafa Vatani, Yasser Zare, Nima Gharib, Kyong Yop Rhee, Soo-Jin Park
Summary: This article introduces a novel model for predicting the efficient conductivity of graphene-polymer systems. Simple equations are used to determine the percolation start, the share of graphene and interphase pieces in the nets. The resistances of tunneling and interphase parts are correlated to graphene conductivity. Experimental data analysis and calculations validate the correctness of the model.
SCIENTIFIC REPORTS
(2023)
Review
Nanoscience & Nanotechnology
Srikanta Palei, G. Murali, Choong-Hee Kim, Insik In, Seul-Yi Lee, Soo-Jin Park
Summary: Perovskite solar cells (PSCs) with a power conversion efficiency of 25.7%, close to the Shockley-Queisser limit, are considered a strong candidate for next-generation energy harvesting. However, stability and reliability issues pose challenges for commercialization. MXenes, as two-dimensional materials, show promise in solar cell applications due to their conductivity, mobility, transparency, tunable work function, and mechanical properties. By using MXenes in different components, PSCs can achieve enhanced conductivity and stability.
NANO-MICRO LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Jong-Hoon Lee, Seul-Yi Lee, Soo-Jin Park
Summary: In recent years, porous carbon materials have been developed for supercapacitor applications. Carbon aerogels with three-dimensional porous networks are promising for electrochemical energy storage. Physical activation using gaseous carbon dioxide provides controllable and eco-friendly processes, while chemical activation produces wastes. The activated carbon aerogels achieved a high specific surface area and large total pore volumes, leading to a high electrical double-layer capacitance. The specific gravimetric capacitance reached up to 89.1 F g(-1) with a high capacitance retention of 93.2% after 3000 cycles.
Article
Chemistry, Multidisciplinary
Seul-Yi Lee, Yeong-Hun Kim, Roop L. Mahajan, Soo-Jin Park
Summary: In this study, a novel approach to determine the London dispersive components of the surface free energy of ACFs was proposed using inverse gas chromatography. The results showed that our method provides more accurate and reliable values compared to the traditional method, making it a valuable tool for designing interface engineering in adsorption-related applications.
Article
Materials Science, Multidisciplinary
Seong-Hwang Kim, Sang-Jin Park, Seul-Yi Lee, Soo-Jin Park
Summary: To meet the demand for faster and more powerful computing, effective heat dissipation is crucial for the longevity, reliability, and high performance of electronic systems. Graphitic material-loaded polymeric composites (GPCs) with excellent thermal conductivities are highly sought after in the field of modern electronic packaging materials. However, the enhancement efficiency of GPCs is hindered by filler agglomeration and interfacial thermal resistance.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Review
Chemistry, Multidisciplinary
Seong-Hwang Kim, Seul-Yi Lee, Yali Zhang, Soo-Jin Park, Junwei Gu
Summary: This review provides a comprehensive overview of stealth technology and radar absorbing materials (RAMs), with a particular focus on carbon-based materials. It discusses the history and basic concepts of stealth technology and RAMs, and explores recent advancements and strategies in carbon-based RAMs for electromagnetic attenuation. The review highlights the potential of carbon-based RAMs for practical applications and emphasizes the need for further research to enhance their performance.
Article
Chemistry, Multidisciplinary
Choong-Hee Kim, Seul-Yi Lee, Soo-Jin Park
Summary: This study successfully prepared activated carbons using coffee grounds and potassium oxalate as a biomass precursor and an activating reagent. The activated carbons showed high CO2 adsorption capacity due to their high microporosity, demonstrating the potential for eco-friendly CO2 capture with energy efficiency and mass production.
