Article
Materials Science, Multidisciplinary
Jie Jin, Jinzhou Zhang, Menglei Hu, Xiao Li
Summary: Depositing TiN and TiCN coatings on stainless steel substrates using Closed Field Unbalanced Magnetron Sputter Ion Plating can improve the durability and corrosion resistance of stainless steel bipolar plates in proton exchange membrane fuel cells at high potential, meeting the Department of Energy targets for interfacial contact resistance.
Article
Chemistry, Physical
Xiejing Luo, Luqi Chang, Chenhao Ren, Jiuhong Zhang, Dawei Zhang, Jizheng Yao, Jie Song, Zhanfeng Deng, Chaofang Dong, Xiaogang Li
Summary: This study proposes a sandwich-like C/(Ti:C)/Ti modified Ti bipolar plates, and through computational simulations and experimental verification, it demonstrates that the bipolar plates have lower interfacial contact resistance and smaller corrosion current density, making them suitable for various operating conditions.
JOURNAL OF POWER SOURCES
(2023)
Review
Thermodynamics
Paul C. Okonkwo, Ikram Ben Belgacem, Oladeji O. Ige, Wilfred Emori, Paul C. Uzoma, Mohammad Omar Eqbal, Himangshu Bhowmik
Summary: This paper focuses on the application of potentiodynamic polarization to provide material degradation information of bipolar plates in PEMFC components.
INTERNATIONAL JOURNAL OF GREEN ENERGY
(2021)
Article
Chemistry, Physical
Srinu Akula, Patchaiah Kalaiselvi, Akhila Kumar Sahu, Subbiah Chellammal
Summary: This study successfully synthesized conductive polymer composite coatings in 0.5 M H2SO4, which shifted the corrosion potential of 316L SS in a noble direction and significantly enhanced its corrosion resistance compared to uncoated stainless steel. The PAMT on PPY bilayer coating acted as a good physical barrier, protecting the stainless steel against corrosion in the PEMFC environment.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Selahattin Celik, Bora Timurkutluk, Ugur Aydin, Mikail Yagiz
Summary: Bipolar plates are critical components of PEM fuel cell stacks. Machining flow channels on graphite bipolar plates is challenging, so additive manufacturing methods for other materials are considered as alternatives. This study compares the performance of different bipolar plates and presents a high specific power density titanium design.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Fatih Daricik, Alparslan Topcu, Kadir Aydin, Selahattin Celik
Summary: In this study, carbon fiber/epoxy composite laminates were modified with multi-walled carbon nanotube superconductor materials to improve their electrical and mechanical properties for wider application as bipolar plates in PEMFC systems.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Yu-Sung Kim, In-Sik Lee, Jin-Young Choi, Shinhee Jun, Daeil Kim, Byung-Chul Cha, Dae-Wook Kim
Summary: Coating niobium on 316L stainless steel using pulsed direct-current magnetron sputtering significantly improves corrosion resistance. Increased bias voltage leads to a denser microstructure with smaller crystallite size, reducing the number of pinholes and preventing metal ion dissolution, effectively protecting the bipolar plate in a corrosive environment. Higher bias voltages of 600 and 800 V induce enhanced corrosion resistance, meeting the demands for the bipolar plate.
Article
Green & Sustainable Science & Technology
Peng Ren, Pucheng Pei, Dongfang Chen, Lu Zhang, Yuehua Li, Xin Song, Mingkai Wang, He Wang
Summary: Metallic bipolar plates (BPs) in fuel cells experience corrosion and surface destruction under automotive operating conditions, with dynamic load and startup-shutdown being the main accelerators. Dynamic potential accelerates the breakdown of passivation layer, while pits rich in Cr-species provide protection. Startup-shutdown drives complex corrosion and passivation stages, leading to global destruction represented by microstructure and pits, while producing a surface film through secondary passivation.
Article
Materials Science, Multidisciplinary
Jiansheng Li, Qingzhong Mao, Ming Chen, Wenbo Qin, Xianke Lu, Tong Liu, Dingshun She, Jiajie Kang, Gang Wang, Xiebin Zhu, Yusheng Li
Summary: By utilizing a high-strength 316L stainless steel with heterostructure, the corrosion properties in a 3.5wt.% NaCl solution were explored, showing an enhanced pitting resistance compared to conventional samples. This improvement was attributed to the interruption of stable corrosion pits propagation by the ultrafine/nano-structures surrounding the recrystallized grains. This study may offer a new approach to enhancing corrosion properties through heterostructural designing.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Thermodynamics
Timon Novalin, Bjorn Eriksson, Sebastian Proch, Ulf Bexell, Claire Moffatt, Jorgen Westlinder, Carina Lagergren, Goran Lindbergh, Rakel Wreland Lindstrom
Summary: The study confirms that carbon-coated stainless steel bipolar plates exhibit stability and corrosion resistance in PEMFCs, and are not affected by hydrogen starvation.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Energy & Fuels
Timon Novalin, Bjorn Eriksson, Sebastian Proch, Ulf Bexell, Claire Moffatt, Jorgen Westlinder, Carina Lagergren, Goran Lindbergh, Rakel Wreland Lindstrom
Summary: The use of stainless steel as bipolar plates in proton exchange membrane fuel cells (PEMFCs) has been a concern due to the risk of corrosion and metal ion contamination. Previous studies on this hazard have relied on ex-situ corrosion assessments which may not accurately represent real operating conditions. In this study, uncoated stainless steel bipolar plates were subjected to in-situ hybrid endurance/stress testing to simulate realistic conditions and re-evaluate the need for additional corrosion protection. The results showed no signs of surface dissolution and negligible trace metal concentration in the membrane electrode assembly (MEA). Contact resistance values were stable and changes in cell performance and voltage degradation were unrelated to the presence of uncoated bipolar plates. The corrosion resistance of uncoated stainless steel plates in PEMFCs was attributed to decoupling of bipolar plate surface potentials from electrode potentials and operational control to sustain stainless steel surface passivation.
Article
Chemistry, Physical
Fabrizio Roncaglia, Marcello Romagnoli, Simone Incudini, Elena Santini, Manuel Imperato, Luca Spinelli, Alessandro di Bona, Roberto Biagi, Adele Mucci
Summary: This study presents an experimental method for preparing graphite-epoxy composites suitable for manufacturing bipolar plates in Proton Exchange Membrane Fuel Cells. Wet mixing was found to be advantageous in achieving good electrical and mechanical properties, with the addition of a small percentage of carbon black as a secondary filler. Modeling the effects of molding parameters on a fixed-composition graphite-epoxy composite provided valuable information for future improvements, resulting in conductivity values exceeding US DOE requirements.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Electrochemistry
Andrei Kulikovsky
Summary: A novel method is developed to calculate the cathode impedance of a PEM fuel cell based on charge and mass conservation equations. The cathode catalyst layer is divided into multiple sub-layers, and the steady-state variables within the sub-layers are assumed to be constant. By linearizing and Fourier-transforming the equations, analytical solutions for the overpotential and oxygen concentration perturbations are obtained for each sub-layer. Recurrent formulas are derived to express the perturbation amplitudes on one side of the sub-layer in terms of the values on the other side. By applying the recurrent relations multiple times from the CCL/GDL interface to the membrane surface, the system impedance can be obtained. The method shows high accuracy and tenfold acceleration in impedance spectrum calculations even with only 10 sub-layers and can be applied at arbitrary cell current.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Viera Zatkalikova, Juraj Halanda, Dusan Vana, Milan Uhricik, Lenka Markovicova, Milan Strbak, Lenka Kucharikova
Summary: The PIII nitriding treatment can significantly improve the corrosion resistance of AISI 316L stainless steel surfaces, as consistently confirmed by three independent corrosion tests.
Article
Chemistry, Physical
Muthusamy Packiaraj, Konda Kannan Satheesh Kumar
Summary: Water-soluble conducting polyaniline-sulfonated naphthalene formaldehyde nanocomposites were successfully synthesized by a one-step in-situ polymerization method in this study. The synthesized NCs showed high inhibition efficiency in corrosion protection, acting as a mixed-type inhibitor. This research provides valuable insights for developing novel and sustainable corrosion inhibitors.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Applied
Heena, Komal Sharma, Kamlesh Kumar, Bhargab Das, Raj Kumar
Summary: In this study, holographic films were prepared using an automatic film applicator, and their performance was compared with films prepared by other methods. The results showed that holographic films prepared with the automatic film applicator had higher diffraction efficiency and more uniform thickness, making them suitable for holographic applications.
PROGRESS IN ORGANIC COATINGS
(2024)
Article
Chemistry, Applied
Athira S. Vijayan, Antony Joseph, Abey Joseph, T. S. Abhijith, Baiju G. Nair, V. Sajith
Summary: Novel polydopamine functionalized ceria-zirconia nanoparticles filled water-borne epoxy nanocomposite coatings were developed to prevent microbial-induced corrosion of mild steel. The coatings exhibited exceptional anti-biofouling and anti-biocorrosion properties due to the synergistic effect of PDA functionalization and zirconium incorporation, providing significant enhancement in charge transfer resistance and coating resistance.
PROGRESS IN ORGANIC COATINGS
(2024)
Article
Chemistry, Applied
Yudan Yi, Qingyong Sun, Qijun Li, Bi Shi, Ya-nan Wang
Summary: Producing metal-free leather is an effective approach to eliminate Cr pollution and achieve sustainable development of the leather industry. However, current metal-free tanning technologies have limitations in terms of water sorption and charge properties. By using cationic amphiphilic acrylic copolymers (PSD) as retanning agents, the properties of metal-free leather can be significantly improved, including enhanced hydrophobicity, better dye absorption, and excellent filling effect.
PROGRESS IN ORGANIC COATINGS
(2024)
Article
Chemistry, Applied
Yunqing Xia, Lifen Tong, Xiaofang Feng, Hubing Xiang, Yi He, Xiaobo Liu
Summary: By incorporating functionalized nanofillers, such as polydopamine-modified graphitic carbon nitride and cerium oxide, into epoxy coatings, their corrosion resistance can be improved and their protective period can be extended.
PROGRESS IN ORGANIC COATINGS
(2024)
Article
Chemistry, Applied
Weineng Lu, Guanhao Ma, Jinqing Qu
Summary: Four novel bis-chalcone-based carbazole derivative photoinitiators were designed and synthesized in this study. Their maximum absorption wavelengths were determined and found to exhibit high molar extinction coefficients. Furthermore, a three-component photoinitiation system including bis-chalcone/iodonium/amine was successfully used to trigger the rapid and efficient photopolymerization of acrylates. The photoinitiators also showed good photo bleaching and biocompatibility, making them suitable for applications such as 3D printing and deep coating curing.
PROGRESS IN ORGANIC COATINGS
(2024)
Article
Chemistry, Applied
Xingnan Zhou, Shixian Zhang, Yiheng Song, Hongmei Qin, Chuanxi Xiong, Shan Wang, Quanling Yang, Delong Xie, Rong Fan, Dan Chen
Summary: In this study, eco-friendly 3-amino-1,2,4-triazole (ATA) molecules were used to modify graphene oxide (GO) nanosheets for improving the anti-corrosion performance of water-borne epoxy (WEP) coating. The results show that ATA modification enhances the dispersion of GO in the polymer coating and significantly improves the barrier effect.
PROGRESS IN ORGANIC COATINGS
(2024)
Article
Chemistry, Applied
Hao Fu, Wei Bing, Xushibojie Liu
Summary: In this study, temperature-sensitive coatings with bacteria-killing and bacteria-releasing functions were prepared on silicone rubber surfaces by UV polymerization and UV photocatalysis. The modified surface exhibited strong and persistent bactericidal effect, inhibiting the formation of bacterial biofilm. Moreover, the smart surface can effectively release bacteria and resist bacterial adhesion through temperature changes. The modified silicone rubber surface showed good biocompatibility without cytotoxicity.
PROGRESS IN ORGANIC COATINGS
(2024)
Article
Chemistry, Applied
Lee Eyann, Zulkifli Mohamad Ariff, Mohamad Danial Shafiq, Raa Khimi Shuib, Muhamad Sharan Musa
Summary: By investigating the effect of MAA addition on the properties of the WEA core-shell emulsion, film and coating, it was found that MAA can significantly impact the structure and performance of the coatings, and has great potential for applications.
PROGRESS IN ORGANIC COATINGS
(2024)
Article
Chemistry, Applied
Jinkyu Choi, Kyung Hoon Min, Byeong Seok Kim, Sung-Hyeon Baeck, Sang Eun Shim, Yingjie Qian
Summary: A novel phosphorus-based flame retardant was designed by incorporating aryl groups, which effectively improved the flame retardancy and mechanical properties of polyurethanes.
PROGRESS IN ORGANIC COATINGS
(2024)
Article
Chemistry, Applied
Saowaluk Taechutrakul, Thananchai Piroonpan, Beata Paulina Rurarz, Slawomir Kadlubowski, Piotr Ulanski, Wanvimol Pasanphan
Summary: This study proposes the use of nanogels to disperse and stabilize water-insoluble organic pigment particles in water-based inks. The nanogels were prepared using electron beam-induced chemical reactions and showed good dispersion and stabilization properties. The use of nanogels in ink formulation improved the ink's hiding power, lightfastness, and resistance properties.
PROGRESS IN ORGANIC COATINGS
(2024)
Article
Chemistry, Applied
Shan Wan, Huikai Chen, Bokai Liao, Xingpeng Guo
Summary: In this study, 2-amino-5 mercapto-1,3,4-thiadiazole (ATT) was used as an intercalating agent to prepare ATT/BNNS nanofillers via a liquid-phase assisted ultrasound method. TEM results showed that ATT successfully exfoliated BNNS and reduced agglomeration. The WEP ATT/BNNS coating exhibited the best protective performance under saline immersion due to the combined action of ATT inhibitor and BNNS physical barrier.
PROGRESS IN ORGANIC COATINGS
(2024)
Review
Chemistry, Applied
Lijie Yin, Bo Zhang, Ming Tian, Nanying Ning, Wencai Wang
Summary: This paper reviews the recent progress in the synthesis of bio-based waterborne polyurethanes (BWPU) and focuses on its applications in coatings, adhesives, and antimicrobials. BWPU has attracted much attention due to its good physical and chemical properties, no VOCs emissions, exploitation of renewable substances, and structural design-ability.
PROGRESS IN ORGANIC COATINGS
(2024)
Article
Chemistry, Applied
Yuyang Zhou, Yang Chen, Xinming Cao, Haodong Fu, Yun Li, Yonghui Zhang, Jun Ma, Xin Liu
Summary: This study proposes a strategy to fabricate a high-strength double-layer superhydrophobic actuator, which consists of a metal/glass-based superhydrophobic substrate and a polymer superhydrophobic coating. The coating has high adhesive strength, self-cleaning, anti-ultraviolet irradiation, and anti-stripping properties, along with photothermal and magnetic response capabilities, enabling its application in various fields.
PROGRESS IN ORGANIC COATINGS
(2024)
Article
Chemistry, Applied
Fengbiao Chen, Fei Gao, Xinru Guo, Yu Chen, Xuelang Gao, Liang Shen
Summary: In this study, various covalent adaptable networks (CANs) were synthesized using multifunctional amines and compared with CANs prepared from primary and secondary amines. The results showed that the performance of CANs is closely related to the crosslinking density, and increasing the content of secondary amines improves the performance but weakens the dynamics.
PROGRESS IN ORGANIC COATINGS
(2024)
Article
Chemistry, Applied
Qian Zhang, Mengyi Shen, Xingcai Liu, Hao Fu, Wenbo Yang, Jinyuan Zhao, Jian Wang, Yaping Du, Chunjie Ma
Summary: Rare earth-containing corrosion inhibitors were successfully synthesized and added into epoxy coatings for the anti-corrosion of steel materials. The results showed that the coatings with rare earth elements had better anti-corrosion performance, and this difference in performance could be explained by the inherent properties of rare earth elements.
PROGRESS IN ORGANIC COATINGS
(2024)