Article
Chemistry, Applied
Jae-Hyung Wee, Yoong Ahm Kim, Cheol-Min Yang
Summary: This study focuses on the preparation of N/O co-doped single-walled carbon nanohorns (SWCNH) for high specific volumetric capacitance in supercapacitor electrode materials. The synthesized N/O co-doped SWCNH electrode exhibited superior electrochemical performances with increased specific volumetric, gravimetric, and areal capacitances, attributed to enhanced pseudocapacitive contribution and high bulk density upon N/O co-doping. This simple method for producing SWCNH electrodes with high bulk density and high specific volumetric capacitance could contribute to the development of supercapacitors with high volumetric performance.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Energy & Fuels
Ji Hoon Kim, Yong-il Ko, Seo Yun Lee, Yun Seon Lee, Su Kyung Kim, Yoong Ahm Kim, Cheol-Min Yang
Summary: This paper reports a novel composite of graphene oxide (GO) and single-walled carbon nanohorns (SWCNHs) as an effective substrate for Ni-Co layered double hydroxides (LDH) coatings. The composite exhibited excellent electrochemical characteristics and facile synthesis, making it a promising candidate for pseudocapacitor applications.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Horticulture
Zhishun Fu, Chuanshou Li, Xuejiao Tian, Ruiling Zhan, Jingjing Yang
Summary: This study found that foliar spraying of 100 mg/L single-walled carbon nanohorns (SWCNHs) significantly promotes the growth of apple seedlings and affects carbohydrate allocation and metabolism. The application of SWCNHs increases the synthesis of photosynthate in apple leaves and improves the capacity of carbohydrate unloading and utilization in apple roots. These findings provide a theoretical foundation for the application of SWCNHs in horticultural production and plant biotechnology.
SCIENTIA HORTICULTURAE
(2023)
Article
Materials Science, Multidisciplinary
Xiang-Jie Guo, Qi Zhang, Ya-Nan Li, Yang Chen, Lu Yang, Hai-Yan He, Xing-Tao Xu, Hua-Jie Huang
Summary: Reasonable design and controllable synthesis of non-Pt catalysts with high methanol oxidation activity are important for large-scale commercial applications of direct methanol fuel cells (DMFCs). In this study, nanosized Rh grown on single-walled carbon nanohorns (Rh/SWCNH) have been successfully fabricated as anode catalysts for DMFCs. The resulting Rh/SWCNH catalysts exhibit exceptional electrocatalytic properties and hold great potential as alternatives for commercial Pt/carbon black and Pd/carbon black catalysts.
Article
Chemistry, Physical
Jingrui Huang, Xiaoru Meng, Guangzhao Zhu, Yihang Song, Shoupu Zhu, Ming Chen, Qi Li, Yue Zhou, Meng -Chang Lin
Summary: Thermally oxidized activated carbon (TOAC), acidified activated carbon (AAC), and thermally deoxygenized AC (TAC) were prepared. TOAC showed the highest oxygen content and specific surface area among the three types of activated carbon. TOAC exhibited a significantly higher capacitance than AC, AAC, and TAC, indicating the synergistic effect of anchoring oxygen and large specific surface area on capacitance performance. The oxygen content enhanced the wettability between electrode and electrolyte, while the large specific surface area facilitated ions adsorption and ionic diffusion and transport.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Eleonora Venezia, Pejman Salimi, Susana Chauque, Remo Proietti Zaccaria
Summary: Lithium-sulfur batteries are promising for next-generation energy storage, but face challenges due to sulfur insulation and lithium-polysulfide shuttle effect. A method of encapsulating sulfur in carbon nanohorns was employed to improve conductivity and alleviate shuttle effect. The electrochemical tests showed that the sulfur-carbon nanohorn active material had significant cycle life and stable capacity for a high number of cycles.
Article
Chemistry, Physical
Cunji Gao, Jing Jian, Liuruiqi Luo, Jiawei Liang, Zhilang Li, Maolin Pang, Haobin Cai, Xing -Can Shen
Summary: Phototheranostics is a precise treatment method that integrates light-based diagnostics and therapeutics, minimizing damage to normal tissues. In this study, a nanotheranostic agent, HA-IR808-SWNHs, was designed and synthesized, which can be employed to precisely track and ablate cancer cells in a spatiotemporal manner using an endogenous enzyme.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
Cheng Bi, Hong-Wei Lv, Hui-Ling Peng, Quan-Fu Li
Summary: A sensor for non-enzymatic glucose detection was created by synthesizing a composite of gold nanoparticles and single-walled carbon nanohorns. The nanocomposite displayed high sensitivity, low detection limit, good stability, reproducibility, and selectivity, while delivering accurate glucose content readings consistent with real blood samples. AuNPs/SWCNHs nanoparticles have potential for non-enzymatic glucose detection applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Physical
Iurii V. Panasenko, Mikhail O. Bulavskiy, Anna A. Iurchenkova, Yenanny Aguilar-Martinez, Fedor S. Fedorov, Ekaterina O. Fedorovskaya, Bjorn Mikladal, Tanja Kallio, Albert G. Nasibulin
Summary: Advancements in supercapacitor performance are driven by both material design and device architecture adjustments. This study focuses on designing unique dead-weight free supercapacitors based on PANI electrochemically deposited on free-standing SWCNT films. The research shows that thin free-standing films of SWCNTs with deposited PANI are less prone to self-discharge, enabling higher gravimetric capacitance values.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Monika Rdest, Dawid Janas
Summary: Combining single-walled carbon nanotubes with polyethyleneimine can significantly enhance the electrical conductivity of the material, offering a promising approach for developing high-performance conducting materials.
Article
Chemistry, Physical
Wojciech Zieba, Joanna Czarnecka, Tomasz Rusak, Monika Zieba, Artur P. Terzyk
Summary: The study presents the cytotoxicity of single-walled carbon nanohorn (SWCNH) oxidized materials on A549 and HDF cell lines, as well as the hemocompatibility on human and porcine blood samples. Results show correlation between specific surface area of materials and platelet aggregation, and the I-D/I-G ratio from Raman spectra with hemoglobin release from erythrocytes.
Article
Materials Science, Multidisciplinary
Karolina Z. Milowska, Maciej Krzywiecki, Mike C. Payne, Dawid Janas
Summary: Carbon nanomaterials such as graphene and carbon nanotubes have attracted significant interest due to their extraordinary properties, with the potential to play a key role in future applications. The sensitivity of carbon nanostructures to chemical stimuli allows for enhanced charge propagation capabilities, as seen in the impact of bromine addition on the electrical and thermoelectric properties of single-walled carbon nanotube films. Experimental results show a two orders of magnitude enhancement in thermoelectric capabilities through sonication-assisted introduction of Br2 into the SWCNT network, with computational analyses revealing the dopant's influence on electronic and charge transport properties.
MATERIALS & DESIGN
(2022)
Article
Chemistry, Physical
Amirmostafa Amirjani, Ted V. Tsoulos, Sayyed Hashem Sajjadi, Alessandra Antonucci, Shang-Jung Wu, Giulia Tagliabue, Davoud Fatmehsari Haghshenas, Ardemis A. Boghossian
Summary: In this study, the plasmonic effects of Ag and Au nanoparticles with different geometries on the fluorescence intensity of single-stranded DNA-wrapped single-walled carbon nanotubes (ssDNA-SWCNTs) were systematically investigated. Chirality-dependent fluorescence enhancement was observed, which varied with nanoparticle shape and material. Au nanorods increased the fluorescence of (7, 5) and (7, 6) chiralities by 80% and 60% respectively, while Ag nano triangles increased the fluorescence of (7, 5) and (6, 5) chiralities by 200% and 240% respectively. Finite element modeling confirmed contributions from a plasmon-induced localized increase in electron density and radiative recombination of dark exciton states from the resulting electromagnetic field.
Article
Chemistry, Analytical
Chulalak Damphathik, Chomphunuch Songsiriritthigul, Jamras Lerdsri, Jaroon Jakmunee, Yutthana Wongnongwa, Siriporn Jungsuttiwong, Astrid Ortner, Kurt Kalcher, Anchalee Samphao
Summary: We developed a novel platform for the specific determination of aflatoxin B1 (AFB1) using carbon nanohorns decorated with a cobalt oxide composite and gold nanoparticles. The platform showed good sensitivity and selectivity, attributed to the specific binding property of the anti-aflatoxin B1 antibody. The sensor's accuracy was validated in real samples and it exhibited excellent performance for AFB1 detection, making it suitable for food quality control or detection of other mycotoxins.
Article
Electrochemistry
Wei Zhong, Jing Yang, Yansha Gao, Xiaoqiang Wang, Shuwu Liu, Mingfang Li, Limin Lu, Xuemin Duan
Summary: In this study, a MXene/CNHs composite was successfully synthesized and used as an electrochemical sensor for PAR detection, exhibiting excellent conductivity and catalytic properties. The design of the composite effectively increased the current signal and allowed for the wide detection of PAR at a low detection limit.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2021)
Article
Chemistry, Physical
Go Bong Choi, Jieun Park, Seungki Hong, Jueun Choi, Tae Hoon Seo, Hyungwoo Kim, Yoong Ahm Kim
Summary: In this study, carbon edges were physically passivated through high-temperature treatment with boron atoms, leading to the formation of stable loop structures. The boron-added carbon nanofibers exhibited enhanced electrical conductivity and electrocatalytic activities. This research provides suitable methods for carbon edge passivation and offers new directions for advanced design of high-stability carbon materials in various fields.
Article
Energy & Fuels
A. Hae Jo, So Yeun Kim, Ji Hoon Kim, Yoong Ahm Kim, Cheol-Min Yang
Summary: Carbon-coated Si/carbon nanotube/graphene oxide (C-Si/CNT/GO) microspheres with a core-shell composite structure were fabricated for lithium-ion batteries (LIBs) by spray-drying and chemical vapor deposition (CVD). The composite exhibited high electrochemical capacity, cycling performance, and charge/discharge rate, providing a significant breakthrough for next-gen LIBs.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Review
Chemistry, Multidisciplinary
Jin Hee Kim, Sumin Kim, Jong Hun Han, Sol Bin Seo, Yu Rim Choi, Jinsub Lim, Yoong Ahm Kim
Summary: The inclusion of carbon nanotubes (CNTs) in lithium-ion batteries (LIBs) is crucial for the construction of an electric network of electrodes. This review focuses on how CNTs can contribute to the development of advanced LIBs for electric vehicles (EVs). It discusses the reasons for choosing CNTs as a conducting agent for the cathode, the reinforcing effect of CNTs on the anode, the development of water-based cathode fabrication and dry electrode fabrication with aid of CNTs, and the technical hurdles for widespread use of CNTs in LIBs.
Article
Chemistry, Physical
Linyi Wu, Yipei Li, Binghua Zhou, Jian Liu, Deliang Cheng, Shien Guo, Keng Xu, Cailei Yuan, Mingxi Wang, Gan Jet Hong Melvin, Josue Ortiz-Medina, Sajjad Ali, Teng Yang, Yoong Ahm Kim, Zhipeng Wang
Summary: Coupling graphene-based materials with SiC nanostructures is an effective strategy for improving photocatalytic CO2 reduction performance. In this study, vertical graphene (VG) sheets were synthesized on SiC nanowires derived from rice husks to form the VG@SiC/C composite. The resulting composite exhibited enhanced photocatalytic CO2 reduction, yielding CO and CH4 with yields of 25.5 and 2.3 μmol g-1 h-1, respectively, which is the highest CO yield among SiC-based photocatalysts. Defective VG sheets promoted sunlight absorption, CO2 adsorption and activation, electron-hole pair separation, and overall photocatalyst activity, leading to high CO2 reduction yield and selectivity.
Article
Chemistry, Physical
Go Bong Choi, Yoong-Ahm Kim, Daeseon Hong, Yunji Choi, Sun-Hwa Yeon, Young-Kwon Park, Gyeong-Geun Lee, Heon Lee, Sang-Chul Jung
Summary: In this study, hydrogen and carbon black were produced from hydrocarbons using plasma, and the produced carbon black was heat-treated at various temperatures. The heat-treated carbon black showed increased crystallinity and formed multiple nanoshells. The carbon black heat-treated at 1500 degrees C exhibited the highest capacity and excellent charge/discharge characteristics due to its high electrical conductivity and specific surface area. Therefore, it could be a potential replacement for commercialized Super-P in the future.
Article
Chemistry, Multidisciplinary
Chetna Tewari, Young Nam Kim, Hiroyuki Muramatsu, Morinobu Endo, Yoong Ahm Kim, Yong Chae Jung
Summary: Carbon nanotubes are widely used in various fields due to their unique properties, but their nonpolar nature and insolubility in polar solvents restrict their applications. To overcome this limitation, a highly functionalized and water-soluble double-walled carbon nanotubes (DWNTs) were developed by selectively oxidizing the inner walls using oleum and nitric acid. The presence of oxygenated functional groups resulted in high water solubility, and the conductivity of water-soluble DWNTs was investigated.
Article
Chemistry, Multidisciplinary
Jueun Choi, Go Bong Choi, Sol Bin Seo, Yu Rim Choi, Min Kang, Yoong Ahm Kim
Summary: We prepared an activated carbon using sodium-lignosulfonate and investigated the role of sodium salt in lignin as an activating agent during heat treatment. Our process resulted in a product with a high specific surface area of 1324 -m(2)/g at 800 degrees C and a microporous structure. We observed carbon consumption, pore creation, and an increase in specific surface area due to dehydration reactions, reduction reactions, and intercalation of metallic sodium.
Article
Materials Science, Multidisciplinary
Jingzhe Sun, Dahye Ahn, Junseo Kim, Seunghye Han, Seokjun Cha, Jiwoo Lee, Hyeongsub Choi, Seongcheol Ahn, Hyungwoo Kim, Yoong Ahm Kim, Jong-Jin Park
Summary: In this work, a composite material with shape memory-assisted self-healing and piezoresistive sensing ability is presented. The high conductivity of the material is attributed to a small amount of well-dispersed carbon black. Carboxylic acid groups are introduced into the polyvinyl butyral (PVB) side chain via a ring-opening reaction. The resulting ink with less than 30 wt.% carbon black exhibits high conductivity (3.7 S cm(-1)). Hexamethylene diisocyanate (HDI) is used as a crosslinking agent to promote the reaction between -OH and -COOH in the PVB-COOH side chains, resulting in a dual network with urethane and amide bonds that exhibits shape memory effect. The composite material is also capable of shape memory-assisted self-healing due to the hydrogen bonds between the dual network and -COOH, and it can detect bio-signals such as body movements, breathing, and pulse.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Physical
Thiago A. Moura, Wellington Q. Neves, Rafael S. Alencar, Y. A. Kim, M. Endo, Thiago L. Vasconcelos, Deyse G. Costa, Graziani Candiotto, Rodrigo B. Capaz, Paulo T. Araujo, Antonio G. Souza Filho, Alexandre R. Paschoal
Summary: The unique electronic and vibrational properties of linear carbon chains (LCCs) have attracted attention recently. Raman spectroscopy has been widely used to identify LCC and study its properties. This study investigates the optical resonance window of LCCs encapsulated by multi-walled carbon nanotubes (MWCNTs) and a Raman signature assigned to the LCC's longitudinal acoustic phonon mode. First-principles calculations support the conclusions.
Article
Chemistry, Physical
Nagaraj Murugan, Sadhasivam Thangarasu, Priyadarshini Venkatachalam, Mrunal Bhosale, Shanmugasundaram Kamalakannan, Muthuramalingam Prakash, Sol Bin Seo, Yu Rim Choi, Min Kang, Tae Hwan Oh, Yoong Ahm Kim
Summary: In this study, a novel noble metal-free electrocatalyst composed of holey carbon nanotubes (h-CNTs) and MXene nanocomposites was developed for electrocatalytic hydrogen evolution reaction (HER) and supercapacitor (SC) applications. The electrocatalyst exhibited superior electrochemical performance, with low overpotential and small Tafel slope for HER, as well as high specific capacitance and excellent cyclic stability for SC. The presence of functional groups and the excellent wrapping of h-CNTs on MXene contributed to the enhanced electrocatalytic activity.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Xiaobo Chen, Yipei Li, Mingliang He, Binghua Zhou, Deliang Cheng, Shien Guo, Keng Xu, Cailei Yuan, Mingxi Wang, Hironori Ogata, Gan Jet Hong Melvin, Yoong Ahm Kim, Mauricio Terrones, Morinobu Endo, Zhipeng Wang
Summary: Vertical graphene (VG) has unique three-dimensional structures and excellent physicochemical properties, making it a promising material for supercapacitors. In this study, large-scale VG films were synthesized on flexible substrates, and a novel battery-like supercapacitor (BSCs) was designed using VG on Ni foil (VG@Ni) as a binder-free electrode in KOH electrolyte with redox additives. The VG@Ni electrodes exhibited high areal capacitance, coulombic efficiency, and cycling stability. The BSCs assembled with VG@Ni electrodes showed impressive areal capacitance, energy density, and power density, thanks to the special features and properties of VG materials, high electronic conductivity of the binder-free VG@Ni electrode, and synergistic effects with the redox electrolyte.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Da Jung Kang, Kay-Hyeok An, Sol Bin Seo, Yoong-Ahm Kim, Young -Kwon Park, Gyeong-Geun Lee, Sang-Chul Jung
Summary: Carbon black is produced from benzene using the LPP method and applied as a conductive material in a supercapacitor. Heat treatment increases the conductivity of the carbon black, but temperatures above 1500°C decrease conductivity. The LPP-produced carbon black shows better conductive properties than Super-P, indicating its potential as a new hydrogen production method.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Pham Tan Thong, Dong-Joo Jeong, Hoon Seo, Yoong Ahm Kim, Seunghun Jung, Uk Sim, Ho-Young Jung
Summary: This work investigates the cycle performance of lead-carbon (LC) negative electrode and reference lead negative electrode for automotive applications through a 50% depth-of-discharge (50%DoD) cycle test. The results show that the LC cell has a higher cycle number. Differential voltage analysis reveals an alleviated concentration loss phenomenon for the LC cell at high depth-of-discharge. Sulfation is confirmed for both kinds of electrodes. Scanning electron microscopy and cyclic voltammetry show better preserved inner morphology and electrochemical reactivity for the cycled LC electrode, while energy-dispersive X-ray spectroscopy detects PbSO4 existence on the carbon layer.
JOURNAL OF POWER SOURCES
(2023)
Article
Energy & Fuels
Pham Tan Thong, Yoong-Ahm Kim, Hankwon Lim, Uk Sim, Hoon Seo, Seunghun Jung, Ho-Young Jung
Summary: This study analyzes the cycle performance of negative plate-limited lead-carbon and lead-acid cells, and highlights the improvement brought by carbon-coating and high electrochemical surface of the lead-carbon electrode. The study reveals that the lead-carbon electrode reduces capacity decay by regulating voltage change and maintaining the cell at effective operating states. These findings suggest potential ways to enhance the cell performance and lifespan.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Mrunal Bhosale, Sadhasivam Thangarasu, Nagaraj Murugan, Yoong Ahm Kim, Tae-Hwan Oh
Summary: This study presents a new nanostructured morphology of VS2-rGO-Ni ternary system for alkaline oxygen evolution reaction (OER). By optimizing the interfacial interaction between VS2 and rGO and the dispersion of Ni nanoparticles, the electrocatalyst exhibited excellent OER performance and long-term stability. The nanostructured morphology with a well-connected network structure provides a large active surface for interacting with charge species.
JOURNAL OF ENERGY STORAGE
(2023)
