Article
Polymer Science
Seonwoo Lee
Summary: This work introduces a novel bifunctional building block for versatile photosensitive resists, allowing in situ synthesis of sub-20 nm silver nanoparticles. The practical adaptation to a palladium-free electroless plating process demonstrates easy fabrication of metallic grid-based transparent conductive films. The study also shows the successful fabrication of sub-3 μm copper metal grids on a polyethylene naphthalate film.
Article
Chemistry, Physical
Lulu Chen, Bowen Lu, Juan Zhang, Renbing Wu, Yanhui Guo
Summary: Depositing trace ruthenium clusters on cobalt boride significantly enhances its activity for water splitting in neutral solutions. The electron transfer from cobalt boride to ruthenium facilitates the catalytic process and improves both the hydrogen and oxygen evolution reactions.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Zhenwei Wang, Shikai Zhao, Xue Guo, Jiao Li, Qiangqiang Hu, Yurun Feng, Fangyong Yu, Haibin Sun
Summary: This study investigates the anti-chromium stability of La0.6Sr0.4Co0.2Fe0.8O3-delta (LSCF) cathodes through a simple electroless silver plating method. The modified LSCF-Ag cathodes exhibit improved resistance to chromium poisoning, avoiding the decrease in cell performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Nanoscience & Nanotechnology
Keyvan Jodeiri, Aleksandra Foerster, Gustavo F. Trindade, Jisun Im, Diego Carballares, Roberto Fernandez-Lafuente, Marcos Pita, Antonio L. De Lacey, Christopher Parmenter, Christopher Tuck
Summary: The drive for miniaturization in enzyme-based bioelectronics has led to the development of 3D microstructured electrodes. Additive manufacturing combined with electroless metal plating allows the production of these electrodes with high surface area. The challenge lies in ensuring strong adhesion between the metal layer and polymer structure, which has been achieved in this study through the introduction of an interfacial adhesion layer.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Xun Zhu, Yuan Zhou, Ding-Ding Ye, Rong Chen, Tong Zhang, Qiang Liao
Summary: A novel air-breathing microfluidic fuel cell with discrete-holes film fueling anode was developed in this study, introducing the concept of gas film cooling to enhance fuel transfer efficiency. The visualization and verification of annular film flow based on film fueling were conducted using fluorescence microscopy under various flow conditions. The research results provide valuable insights for promoting the practical application of microfluidic fuel cells.
JOURNAL OF POWER SOURCES
(2021)
Article
Electrochemistry
Peiyao Zhi, Zhi Liu, Kui Jiao, Qing Du
Summary: The research on H-shaped air-breathing dual MFC and their stacks design theory, evaluated their performance through mathematical models, and the results are in good agreement with experimental data. The H-shaped dual cell shows higher output voltage and power density compared to traditional single cell.
ELECTROCHIMICA ACTA
(2021)
Review
Green & Sustainable Science & Technology
Fatma Calili-Cankir, Mohammed S. Ismail, Derek B. Ingham, Kevin J. Hughes, Lin Ma, Mohamed Pourkashanian
Summary: This review focuses on improving the performance of air-breathing polymer electrolyte fuel cells by optimizing key parameters such as the design and material of the current collector, cathode gas diffusion layer, catalyst layer, and cell orientation. It also discusses the impact of ambient conditions on fuel cell performance and methods to mitigate extreme temperature and humidity effects. Additionally, it summarizes hydrogen storage and delivery technologies used in these fuel cells and critiques their design aspects. The review concludes by highlighting the challenges to widespread commercialization of air-breathing fuel cell technology by examining reported fuel cell stacks and systems.
Article
Electrochemistry
Delilah A. Brown, Alex R. MacDonald, Eamon A. McCarron, Sebastian Zarwell, Tobias Bernhard, Ralf Bruning
Summary: A study was conducted on a cyanide-stabilized electroless copper plating process with nickel as a stress-regulating additive. It was found that small amounts of nickel or cyanide can increase the deposition rate, while large amounts of cyanide decrease it. Both nickel and cyanide accelerate the transition to steady-state plating conditions, but they have different effects on the deposition rate and mixed potential.
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2021)
Article
Chemistry, Analytical
Nikita S. Buylov, Nadezhda V. Sotskaya, Oleg A. Kozaderov, Khidmet S. Shikhaliev, Andrey Yu. Potapov, Vladimir A. Polikarchuk, Sergey V. Rodivilov, Vitaly V. Pobedinskiy, Margaryta V. Grechkina, Pavel V. Seredin
Summary: In this study, thin nickel films deposited by electroless plating were investigated for their potential use as barrier and seed layers in through-silicon vias (TSV) technology. The effects of organic additives in the electrolyte on the surface morphology, crystal state, and phase composition of the deposited coatings were analyzed using SEM, AFM, and XRD methods. The results showed that the use of organic additive resulted in smoother samples surfaces and reduced roughness values. X-ray diffraction analysis revealed the presence of nanocrystalline structures in the coatings, with different average sizes of nickel crystallites.
Article
Chemistry, Physical
Giin-Shan Chen, Yen-Chang Pan, Wei -Chun Chen, Chien -Nan Hsiao, Chin -Chia Chang, Yi-Lung Cheng, Jau-Shiung Fang
Summary: Self-assembled monolayers (SAMs) and self-forming barriers are effective in enhancing the reliability of thin Co films and Co nanolines. The SAM barrier can retain its integrity after annealing, but cannot prevent interface diffusion and chemical reactions. However, the Co(MnO)/SAM/NiSI/Si remains stable under identical annealing without interface diffusion and chemical reactions. The tiny MnO alloying significantly enhances the electromigration reliability of Co nanolines.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Shangshang Wang, Yiming Zhang, Haosen Xu, Jianbo Zhang
Summary: Inadequate cold start capability is a hindrance for fuel cell vehicles in cold regions. An adiabatic model cell is designed to simulate central cells in PEFC stack, with thermal adjustment boards, thermocouples, and heating plates providing adiabatic thermal boundary conditions for reproducible and controlled study of cold start.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Michael Striednig, Magali Cochet, Pierre Boillat, Thomas J. Schmidt, Felix N. Buechi
Summary: This paper investigates the potentials and limits of evaporative cooling at stack level in polymer electrolyte fuel cell systems. A zero-dimensional model was developed to show that evaporative cooling is feasible over a wide range of operating conditions, offering substantial energy and cost savings.
JOURNAL OF POWER SOURCES
(2022)
Article
Materials Science, Multidisciplinary
Giin-Shan Chen, Wan-Ling Gao, Chin-Chia Chang, Jau-Shiung Fang, Yi-Lung Cheng
Summary: The study investigates the feasibility of using mercaptosilane SAM as a barrier and seed adsorber, showing that it can enhance the adhesion strength and thermal stability of copper films. The mercaptosilane monolayer catalyzes copper metallization and clarifies the seeding of nickel particles.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Thermodynamics
G. M. Cabello Gonzalez, Baltasar Toharias, Alfredo Iranzo, Christian Suarez, Felipe Rosa
Summary: This study conducted a comprehensive set of experimental tests to investigate voltage and temperature deviation in a fuel cell stack under different operating conditions. The findings showed that temperature was the most influential parameter on performance, with the external cells consistently exhibiting lower performance than the central ones. Increasing temperature, pressure, and cathode stoichiometry improved stack performance.
Article
Chemistry, Applied
E. P. Korchagin, M. Yu Shtern, I. N. Petukhov, Yu Shtern, M. S. Rogachev, A. O. Kozlov, B. R. Mustafoev, A. A. Dedkova
Summary: Procedures for preparing ohmic contacts on bismuth and antimony chalcogenides thermoelectric materials were suggested using electroless Ni plating. The properties of the contacts were influenced by the surface roughness, decapping solutions, electrolyte composition, and the Ni sublayer. The electroless plated Ni films had high thickness, Ni content, and low resistivity.
RUSSIAN JOURNAL OF APPLIED CHEMISTRY
(2022)
Article
Green & Sustainable Science & Technology
Hansol Lee, Timothy Alexander Listyawan, Nokeun Park, Guntae Kim, Ikwhang Chang
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2020)
Article
Energy & Fuels
Yusung Kim, Sanghoon Lee, Gu Young Cho, Wonjong Yu, Yeageun Lee, Ikwhang Chang, Jong Dae Baek, Suk Won Cha
Article
Green & Sustainable Science & Technology
Hongnyoung Yoo, Jaeyeon Kim, Obeen Kwon, Hyeok Kim, Geon Hwi Kim, Heesoo Choi, Hyeonjin Cha, Dasol Kim, Segeun Jang, Taehyun Park
Summary: This study presents a flexible polymer electrolyte membrane fuel cell with a pre-bent flow field, performing better in the bent position compared to traditional flexible fuel cells. The decreased ohmic and faradaic resistances, along with enhanced power density in the bent position, were attributed to improved interfacial contact between the MEA and flow-field plates.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2021)
Article
Energy & Fuels
Hyeok Kim, Geonhwi Kim, Jaeyeon Kim, Dasol Kim, Obeen Kwon, Hongnyoung Yoo, Hyeonjin Cha, Heesoo Choi, Taehyun Park
Summary: The study found that by adjusting the width and matching degree, the performance of Polymer electrolyte membrane fuel cells can be improved, and the maximum power density can be increased. In addition, by using non-dimensional numbers such as Re, Sc, and Sh to study diffusion characteristics, the improvement of mass transport was further confirmed.
Article
Chemistry, Physical
Heesoo Choi, Jaeyeon Kim, Obeen Kwon, Hongnyoung Yoo, Hyeok Kim, Hyeonjin Cha, Taehyun Park
Summary: In this study, water removal in a transparent fuel cell and its relationship with voltage and impedance responses are analyzed. It is found that the frequency of water flow is positively correlated with voltage, suggesting that frequent flooding-induced water removal could enhance fuel cell performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Jaeyeon Kim, Hongnyung Yoo, Hyeok Kim, Dasol Kim, Geon Hwi Kim, Obeen Kwon, Heesoo Choi, Hyeonjin Cha, Taehyun Park
Summary: A novel method for replenishing platinum catalysts on an electrolyte membrane of PEMFC was studied by injecting electrocatalyst-supplementing ink into a pre-assembled fuel cell. Straightforward catalyst-replenishment equipment and protocol were proposed, and feasibility study showed promising results supported by electrochemical impedance spectroscopy and X-ray analysis. Results indicated the successful presence of platinum catalysts on the membranes of the fuel cells.
ENERGY SCIENCE & ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Hyeonjin Cha, Obeen Kwon, Jaeyeon Kim, Heesoo Choi, Hongnyoung Yoo, Hyeok Kim, Taehyun Park
Summary: This study investigated the properties of carbon paper and the effects of different treatments on its performance when applying nonenzymatic glucose fuel cells. The results showed that the low hydrophobicity, high porosity, and thin thickness of carbon paper are advantageous for improving the power density of the battery.
Article
Thermodynamics
Obeen Kwon, Jaeyeon Kim, Heesoo Choi, Hyeonjin Cha, Myunggyu Shin, Youngjin Jeong, Taehyun Park
Summary: This study investigates the application of carbon nanotube (CNT) as a functional interlayer in polymer electrolyte membrane fuel cells (PEMFCs) and finds that it can improve the performance of the cells. Under elevated backpressure conditions, the performance of the MEA with CNT interlayer improved by 91.8%, with reduced ohmic and charge-transfer resistances. However, there is still mass transport loss in the high current density region.
Article
Energy & Fuels
Seokhun Jeong, Obeen Kwon, Jaeyeon Kim, Hongnyoung Yoo, Hyeonjin Cha, Heesoo Choi, Hyeok Kim, Younho So, Taehyun Park
Summary: The deposition of an ultrathin layer composed of carbon nanotubes on the cathodic catalyst layer enhances the performance of polymer electrolyte membrane fuel cell under low to mid humidity conditions. The layer improves membrane hydration and expands the active area, leading to significant performance enhancement.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Electrochemistry
Hyeonjin Cha, Obeen Kwon, Heesoo Choi, Hongnyoung Yoo, Jaeyeon Kim, Seokhun Jeong, Taehyun Park
Summary: In this study, the permeability and performance analysis of a nonenzymatic glucose fuel cell were reported. The serpentine shape demonstrated the highest power density and current density among the three flow-field designs.
Article
Chemistry, Physical
Shengxiang Fu, Dongfang Zhang, Suk Won Cha, Ikwhang Chang, Guofu Tian, Chunhua Zheng
Summary: In this research, a novel machine learning algorithm, extreme gradient boosting (Xgboost), is applied to the thermal management system (TMS) of a proton exchange membrane fuel cell (PEMFC) stack. The proposed TMS controls the inlet and outlet temperatures of the PEMFC stack while considering the proton exchange membrane (PEM) water content. Results show that the Xgboost-based TMS outperforms other ML-based and fuzzy logic-based TMSs in terms of control performance.
JOURNAL OF POWER SOURCES
(2023)
Article
Engineering, Environmental
Seokhun Jeong, Obeen Kwon, Hongnyoung Yoo, Jaeyeon Kim, Heesoo Choi, Yoonho So, Junghyun Park, Jeongyun Lee, Youngjin Jeong, Taehyun Park
Summary: Low-temperature substrate sputtering on an acid-treated carbon nanotube sheet enables high platinum utilization by forming a thin catalyst layer with high Pt density and vacancies. The substrate temperature affects the formation of cracks and grain size in the Pt thin film, leading to increased Pt surface area and vacancies. Compared to the Pt-deposited ATCNT at 20°C, the Pt-deposited ATCNT at -50°C shows a 51.35% increase in electrochemical surface area and a high Pt mass-specific peak power density of 5.93 kW g-1Pt, demonstrating an effective strategy for enhancing Pt utilization.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Yoonho So, Hongnyoung Yoo, Jaeyeon Kim, Obeen Kwon, Seokhun Jeong, Heesoo Choi, Hyeonjin Cha, Taehyun Park
Summary: In this study, the investigation of gas diffusion layers (GDLs) in flexible polymer electrolyte membrane fuel cells (PEMFCs) was reported, and the cell assembly pressure was measured via force sensitive resistor (FSR). The performance of flexible PEMFCs using different GDLs was confirmed, with carbon cloth (pristine CC), carbon paper (CP), and carbon cloth with MPL (MPL CC) yielding different power outputs. The study also analyzed the cell assembly pressure based on curvatures, with different GDLs exhibiting different pressure levels. This research is valuable for guiding the selection of GDLs in flexible PEMFCs.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2023)
Review
Green & Sustainable Science & Technology
Obeen Kwon, Junghyun Park, Gyutae Park, Seonghyeon Yang, Taehyun Park
Summary: This article summarizes the application strategies of carbon nanotubes (CNTs) in key components of fuel cells, including catalysts, polymer electrolyte membranes (PEMs), gas diffusion layers (GDLs), and bipolar plates (BPs). It also provides a summary of methods for the synthesis and mass production of CNTs, such as arc discharge, chemical vapor deposition (CVD), and laser ablation. The challenges and remarkable contributions of CNTs in fuel cells are discussed. The application of CNTs in fuel cells still holds great potential for outstanding improvements in electrochemical performance and durability.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2023)
Article
Electrochemistry
Timothy Alexander Listyawan, Hansol Lee, Yoon Ho Lee, Jong Dae Baek, Guntae Kim, Nokeun Park, Ikwhang Chang
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2020)
