Article
Engineering, Chemical
Byoung-Min Lee, Hyeong-Seok Chang, Je Moon Yun, Jae-Hak Choi
Summary: A simple and eco-friendly fabrication strategy for porous carbon monoliths with 3-dimensional conductive networks was demonstrated. The resulting porous carbon/carbon nanotube composite monoliths showed excellent electrochemical performance due to their well-developed hierarchical porosity and high electrical conductivity. The PCCMs exhibited a specific capacitance of 240 F g(-1) at 1 A g(-1) in a 3-electrode configuration. The PCCM-based symmetric capacitor showed high specific capacitance, rate capability, power density, and cycling stability, making it a promising material for high-performance electrical double-layer capacitors.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Physical
Chang-Uk Jeong, Nurzhan Umirov, Doe-Hyun Jung, Deok-Ho Seo, Byoung-Min Lee, Beom-Seok Choi, Sung-Soo Kim, Jae-Hak Choi
Summary: A simple and effective pre-lithiation strategy was developed to address the initial issues with porous carbon as anode material in Li-ion batteries. The study found that Li-incorporated PCMs have amorphous carbon structures and well-developed hierarchical pore architectures, leading to stable cycle life at high current densities. Analysis showed that the diffusion coefficient of the prepared Li-incorporated PCMs is higher at the end of discharge, making them favorable for high-power LIB anode materials.
JOURNAL OF POWER SOURCES
(2021)
Article
Agricultural Engineering
Arjeta Kryeziu, Vaclav Slovak, Julien Parmentier, Tomas Zelenka, Severinne Rigolet
Summary: A simple and environmentally friendly method for transforming cellulose into porous carbon monoliths was developed. The method involves freezing the cellulose solution, followed by ethanol regeneration and water washing. The resulting cellulose monoliths exhibit significant macroporosity and microporosity.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Biochemistry & Molecular Biology
M. S. M. Ali, Z. Zainal, M. Z. Hussein, M. H. Wahid, N. N. Bahrudin, M. M. Muzakir, R. Jalil
Summary: Porous carboxymethyl cellulose (CMC) carbon films were prepared from lignocellulosic based materials and incorporated with manganese oxide (Mn2O3) to be used as supercapacitor electrodes. The film made from bamboo showed higher electrochemical performance and cycling stability compared to the one made from oil palm fruit. The study highlights the potential of these new electrode materials for supercapacitor applications.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Green & Sustainable Science & Technology
E. K. Kim, B. M. Lee, J. J. Park, J. H. Choi, J. M. Yun
Summary: The study prepared porous carbon materials with well-interconnected multi-modal pore structures, large specific surface area, and large pore volume via ice-templating and carbonization using tannic acid as the carbon precursor and sodium citrate as the activation agent. The obtained carbon materials showed excellent electrochemical performance and have potential applications in eco-friendly supercapacitors.
MATERIALS TODAY SUSTAINABILITY
(2022)
Article
Green & Sustainable Science & Technology
Eun-Kyung Kim, Hyeong Seok Chang, Byoung-Min Lee, Jin-Ju Park, Je-Moon Yun, Jae-Hak Choi
Summary: Hierarchically porous carbon materials with large specific surface area and interconnected hierarchical pore structures were prepared from 2-hydroxyethyl cellulose via eco-friendly methods, and exhibited excellent electrochemical performance in high-performance supercapacitors.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2022)
Article
Chemistry, Multidisciplinary
Hyeong Seok Chang, Byoung-Min Lee, Je Moon Yun, Jae-Hak Choi
Summary: Porous carbon pearls with well-developed pore structures were successfully prepared and exhibited excellent supercapacitive performance and cycling stability.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Biochemistry & Molecular Biology
Yuanyuan Wang, Chengshuai Lu, Xuefei Cao, Qiang Wang, Guihua Yang, Jiachuan Chen
Summary: In this study, carbon microspheres derived from hemicelluloses were prepared using hydrothermal carbonization and activated with different activators to improve their electrochemical performance as supercapacitors. The carbon spheres activated by ZnCl2 showed the highest specific surface area and pore volume, leading to excellent electrochemical performance in terms of high specific capacitance, energy density, and cyclic stability.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Applied
Xiangyang Guo, Qi Zhang, Meng Zhu, Dongbo Zhao, Jinhui Yang, Junchai Zhao, Xiaobo Lin
Summary: A facile method for fabricating hierarchical super-elastic sponges using carboxymethyl cellulose was reported. The resulting sponges exhibited excellent performance and potential in various applications.
CARBOHYDRATE POLYMERS
(2023)
Article
Energy & Fuels
Lingqi Huang, Zhiyong Luo, Mingwu Luo, Qi Zhang, He Zhu, Kaiyuan Shi, Shiping Zhu
Summary: This study developed a straightforward one-step method to prepare nitrogen-fluorine dual-doped porous carbon with excellent specific surface area and high doping levels, demonstrating superior performance in supercapacitive electrodes and devices, offering a new protocol for synthesis of high-performance carbon-based materials for energy-storage applications.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Green & Sustainable Science & Technology
Xue-Qin Ma, Bo Zhang, Zhi-Xiang Xu, Yi Tan, Bin Li, Yong-Cai Zhang, Guo-Song Ni, Wei -You Zhou, Rafael Luque, Hui-Yan Zhang
Summary: N-carbon material was prepared using hydrothermal carbonization assisted by ammonium nitrate, resulting in improved electrochemical properties for high-energy-density supercapacitors.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Energy & Fuels
Chang Liu, Kun Wang, Yu-Han Du, Rao Danish Aleem, Ya-Qi Shan, Chang-Qing Cao, Pei-Gao Duan, Duo Jia, Naveed Ramzan
Summary: This study investigated the cohydrothermal carbonization of cellulose and pyrazine for the production of supercapacitor carbon. The effect of pyrazine loading and the addition of acrylic acid on the yield and properties of the resulting hydrochar were studied. The presence of pyrazine improved the physical properties of the hydrochar, and adding acrylic acid further increased the yield of hydrochar.
JOURNAL OF ENERGY STORAGE
(2024)
Article
Energy & Fuels
Penggang Qi, Yinhai Su, Liren Yang, Jiaxing Wang, Mei Jiang, Xiaofei Sun, Ping Zhang, Yuanquan Xiong
Summary: In this study, hierarchical porous carbon with a nanosheet structure was prepared from the heavy fraction in bio-oil. The roles of templating agents and activators in the carbonization polymerization process were investigated. The resulting porous carbon exhibited a high specific surface area and abundant oxygen-containing functional groups, leading to excellent supercapacitor performance.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Aparna Deshpande, Shivam Rawat, Indrajit M. Patil, Sunit Rane, Thallada Bhaskar, Satishchandra B. Ogale, Srinivas Hotha
Summary: This study explores saccharide-derived carbons as sustainable anodes for supercapacitors. The acid-base synergistic pre-treatment/activation technique used enhances the surface area and charge storage capacity, thereby improving the performance of the capacitors. The results have important implications for understanding the electrochemical behavior of carbons.
Article
Energy & Fuels
Fuyao Deng, Yan Li, Yude Zhang, Qian Zhang, Yuanyuan Li, Jinli Shang, Jiebin Wang, Rongjun Gao, Ru Li
Summary: A honeycomb-like porous carbon derived from low-cost popcorn was fabricated through a self-template strategy, and the effect of pre-carbonization temperature on its morphology, structure, and electrochemical performance was carefully studied. The optimized popcorn-derived porous carbon, PC-R6A7, showed a unique honeycomb-like morphology, ultra-high surface area (2361.25 m2 g-1), and moderate nitrogen content (1.8 at.%), making it suitable as electrode materials for supercapacitors. PC-R6A7 exhibited excellent capacitance (425 F g-1 at 1 A g-1) and high retention rate (82.4%) even at high current densities. It also demonstrated high energy density (10.5 Wh kg-1 at 256 W kg-1) and good cycling stability (92.0% capacity retention after 10,000 cycles at 5 A g-1) in 6 M KOH electrolyte. PC-R6A7 showed promising potential in energy storage applications.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Multidisciplinary
Choyeon Park, Chanil Park, Sungmin Park, Jaeho Lee, Jae-Hak Choi, Yong Seok Kim, Youngjae Yoo
Summary: This study reports the development of a highly efficient passive daytime radiative cooling (PDRC) using a thermoplastic polyurethane (TPU) film with bimodal pores. The TPU film exhibited excellent solar reflectivity and emitted heat efficiently, resulting in ambient cooling. 3D-printed models covered with these TPU films demonstrated superior indoor cooling efficiency compared to commercial paint.
Article
Materials Science, Composites
Seonghyeon Ahn, Chanil Park, Sungmin Park, Jae-Hak Choi, Yong Seok Kim, Youngjae Yoo
Summary: This study proposes a method for reducing the melt viscosity of PPS composites by synthesizing a novel flow modifier (PHBTA) using MCP. Compared to a reference material (PHPA), PPS/GF composites containing PHBTA exhibit enhanced performance and improved compatibility, and the predicted results are in good agreement with experimental results. The study aims to improve the flowability of PPS/GF composites and provides further insight into the rheological and mechanical properties of FRP composites.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Textiles
Hyeong-Seok Chang, Byoung-Min Lee, Ahreum Hwang, Je Moon Yun, Jae-Hak Choi
Summary: This paper proposes an efficient strategy to upcycle waste cotton fabrics into freestanding carbon fabrics via two-step thermal treatment. The prepared carbon fabrics show excellent electrochemical performance and cycle stability, making them promising electrode materials for energy storage devices.
FIBERS AND POLYMERS
(2022)
Article
Chemistry, Physical
In-Tae Hwang, Dong-Seok Han, Joon-Yong Sohn, Junhwa Shin, Jae-Hak Choi, Chan-Hee Jung
Summary: This research demonstrates an environmentally friendly and efficient method for functionalizing polypropylene fabric through pre-irradiation graft polymerization, and further using it to fabricate a Prussian blue immobilized adsorbent for Cs+ decontamination. The results show that the addition of a surfactant produced a uniform graft polymer at low monomer concentrations, and the adsorbent exhibited a good adsorption capacity compared to commercial adsorbents.
RADIATION PHYSICS AND CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Orynbassar Mukhan, Nurzhan Umirov, Byoung-Min Lee, Ji-Su Yun, Jae-Hak Choi, Sung-Soo Kim
Summary: This study presents a phenolic resin-coated Mg-SiOx composite anode to increase the energy density of lithium-ion batteries. By improving the kinetics of Li+ transport among the electrodes and ensuring the formation of a stable solid electrolyte interphase, the composite anode delivers a stable specific capacity for high-performance batteries. When paired with a commercial cathode, the composite anode achieves a higher energy density compared to conventional graphite-based cells.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Management
Ji Yeon Lee, Jeongsub Lim, Jae-Hak Choi, Byeong-Hee Lee
Summary: This study analyzes the sentiment shift and major discussion topics related to graphene among the interested public on Reddit. The findings show that over half of the comments express positive sentiment towards graphene, with fluctuations corresponding to major events such as the Nobel Prize and commercialization delays. The research demonstrates the importance of understanding public sentiments towards new technologies like graphene for R&D experts and policymakers.
TECHNOLOGY ANALYSIS & STRATEGIC MANAGEMENT
(2022)
Article
Materials Science, Multidisciplinary
Byoung-Min Lee, Jin-Ju Park, Sang-Won Park, Je Moon Yun, Jae-Hak Choi
Summary: This study utilized waste floral foam to prepare porous carbon foam as an electrode material for supercapacitors. The prepared carbon foam showed excellent performance, indicating its potential as an electrode material for high-performance green supercapacitors.
KOREAN JOURNAL OF MATERIALS RESEARCH
(2022)
Article
Engineering, Chemical
Zahid Hanif, Ki-In Choi, Jung-Hwan Jung, Arni Gesselle M. Pornea, Eunkwang Park, Jungho Cha, Hyun-Rae Kim, Jae-Hak Choi, Jaewoo Kim
Summary: Boron nitride nanotubes (BNNTs) are used as nanofiller additives to enhance the properties of polymer composites. However, their hydrophobicity and van der Waals attraction hinder their dispersion in solvents. A deposition approach using plant-based polyphenols and amines was proposed to overcome this issue. The modified BNNTs showed improved dispersibility and interaction with the polymeric matrix, leading to enhanced composite performance.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Environmental
Byoung-Min Lee, Jonghwan Jung, Hui-Jeong Gwon, Taek Sung Hwang
Summary: In this study, eco-friendly and effective plasticizers based on isosorbide were synthesized and characterized. The alkyl-chain length of the plasticizer was found to affect the properties of PVC sheets, where increasing the alkyl-chain length improved the strength and modulus of the PVC sheets but reduced their elongation. Epoxidation of the plasticizer enhanced its plasticizing properties, and the synthesized plasticizers exhibited better thermal stability compared to a commercial plasticizer.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Green & Sustainable Science & Technology
Eun-Kyung Kim, Hyeong Seok Chang, Byoung-Min Lee, Jin-Ju Park, Je-Moon Yun, Jae-Hak Choi
Summary: Hierarchically porous carbon materials with large specific surface area and interconnected hierarchical pore structures were prepared from 2-hydroxyethyl cellulose via eco-friendly methods, and exhibited excellent electrochemical performance in high-performance supercapacitors.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2022)
Article
Green & Sustainable Science & Technology
E. K. Kim, B. M. Lee, J. J. Park, J. H. Choi, J. M. Yun
Summary: The study prepared porous carbon materials with well-interconnected multi-modal pore structures, large specific surface area, and large pore volume via ice-templating and carbonization using tannic acid as the carbon precursor and sodium citrate as the activation agent. The obtained carbon materials showed excellent electrochemical performance and have potential applications in eco-friendly supercapacitors.
MATERIALS TODAY SUSTAINABILITY
(2022)
Article
Engineering, Chemical
Byoung-Min Lee, Hyeong-Seok Chang, Je Moon Yun, Jae-Hak Choi
Summary: A simple and eco-friendly fabrication strategy for porous carbon monoliths with 3-dimensional conductive networks was demonstrated. The resulting porous carbon/carbon nanotube composite monoliths showed excellent electrochemical performance due to their well-developed hierarchical porosity and high electrical conductivity. The PCCMs exhibited a specific capacitance of 240 F g(-1) at 1 A g(-1) in a 3-electrode configuration. The PCCM-based symmetric capacitor showed high specific capacitance, rate capability, power density, and cycling stability, making it a promising material for high-performance electrical double-layer capacitors.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Materials Science, Textiles
Seungchan Noh, Wuchang Jung, Seungbum Sim, HyunSik Son, Jae-Hak Choi, Jaseung Koo
Summary: The extrusion parameters of PLA, including draw ratio, take-up speed, and godet temperature, were optimized to improve the mechanical and thermal properties of the fiber.
FIBERS AND POLYMERS
(2023)
Article
Polymer Science
Dong-Seop Kim, Byoung-Min Lee, Hyun-Rae Kim, Sangwon Park, Jong-Seok Park, Daeyoung Hwang, Jaewoo Kim, Jae-Hak Choi
Summary: This study investigates the effects of clays and electron beam irradiation (EBI) on the properties of poly(ethylene-co-vinyl acetate) (EVA)/high-density polyethylene (HDPE)/aluminum hydroxide (ATH)/clays composites. The addition of clays and the formation of crosslinked network structures by EBI prove to be effective in improving the physical properties and flame retardancy of the composites.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2023)
