Article
Materials Science, Multidisciplinary
Mohan Chen, Ji Cheng Ding, Se-Hun Kwon, Qimin Wang, Shihong Zhang
Summary: In this study, NbN coatings were deposited using multi-arc ion plating at different nitrogen partial pressures, and the effects of phase composition, microstructure, and surface morphology on the anti-corrosion behavior and conductivity were investigated. The results showed that the coating deposited at a relatively high nitrogen partial pressure exhibited the best corrosion resistance and conductivity.
Article
Materials Science, Characterization & Testing
Firuze Soltani-Kordshuli, Charles Miller, Nathaniel Harris, Min Zou
Summary: In this study, Hilbert curve patterns were laser-textured on stainless steel substrates and PTFE thin coatings. The laser-textured PTFE coatings reduced the hardness of the coatings and prevented tearing under nanoindenter scratches. Additionally, laser-texturing on both PTFE coatings and the stainless steel substrate significantly improved the wear life of the coatings.
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
Materials Science, Multidisciplinary
Rong Tu, Rui Min, Mai Yang, Yang Yuan, Long Zheng, Qizhong Li, Baifeng Ji, Song Zhang, Meijun Yang, Ji Shi
Summary: This study proposes a bipolar plate coating for proton exchange membrane fuel cells (PEMFCs) that has high corrosion resistance and low contact resistance. The optimized coating exhibits excellent performance in a harsh environment, meeting the standard requirements and providing good metal protection.
Article
Chemistry, Physical
Qilong Huang, Yizhang Tong, Bin Hu, Jingshu Huang, Xianwu Cao, Zhitao Yang, Guangjian He
Summary: In this study, a multilayer high-performance polybenzoxazine/expanded graphite composite bipolar plate with a 'graphite-composites-graphite' structure was prepared. The results showed that the multilayer synergy improved the conductivity and flexural strength of the composite bipolar plate, leading to an increased power density of the assembled cell.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Materials Science, Multidisciplinary
Wei Meng, Haifeng Zhu, Xiaopeng Wang, Guanghui Li, Yingze Fan, Deen Sun, Fantao Kong
Summary: A C/TiC nanocomposite coating was successfully prepared on a titanium surface and characterized, showing excellent corrosion resistance and low interfacial contact resistance.
Article
Electrochemistry
Jie Jin, Xu Tian, Yi Tao, Xianli Kou, Yuanhao Mi, Xiaokang Xu, Huifeng Yang
Summary: CrMoCN coatings with different carbon contents were prepared on 316L stainless steel substrates by closed-field unbalanced magnetron sputtering. The coatings' microstructure, phase composition, bonding state, corrosion properties, interfacial conductivity, and hydrophobicity were investigated. The results showed that the CrMoCN-14 coating had the best corrosion resistance, chemical stability, and interfacial conductivity, making it a potential material for bipolar plates.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2023)
Article
Energy & Fuels
I. Gusti Ayu Arwati, Edy Herianto Majlan, Sagir Alva, Wahyu Muhammad
Summary: Aluminum AA5052 is an inexpensive and lightweight metal. The use of green organic solvent chitosan can effectively reduce its corrosion. The best corrosion inhibition effect is achieved at a chitosan concentration of 0.5% wt and EPD time of 20 minutes. SEM-EDX analysis reveals that the metal surface becomes smoother and the corrosion rate decreases after being coated with chitosan.
Article
Thermodynamics
Dong Guan, Biyu Pan, Zhen Chen, Jing Li, Hui Shen, Huan Pang
Summary: A quantitative model is proposed in this study to characterize the pressure distribution on bipolar plates. A theoretical model is established based on finite element modeling (FEM) and measurement, and flexible pressure sensors are used for testing. Furthermore, a nacre-inspired optimization approach is applied to improve the uneven pressure distributions. Results show that the optimized design can significantly improve the uneven clamping load and provide an effective approach for designing durable PEMFC stacks.
Article
Materials Science, Multidisciplinary
Y. L. Su, W. H. Kao, G. Y. Chang
Summary: This study deposited CrCx coatings on stainless steel substrates using radio frequency unbalanced magnetron sputtering. It was found that the CrC35 coating had the lowest friction coefficient and wear rate, while the CrC25 coating showed the best corrosion resistance. Additionally, the CrC25 coating exhibited good electrochemical properties in a simulated Proton Exchange Membrane Fuel Cell environment.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Engineering, Mechanical
Jie Zhang, Ruichuan Wang, Yun Zeng
Summary: This study establishes a hydroforming model to investigate the quality control mechanism of bipolar plate hydroforming. The results demonstrate that increasing the pressure in the hydroforming process improves the formability and filling rate of bipolar plates, but can also lead to partial fractures. Moreover, the forming effect of the die's outer radius is better than that of the inner radius, while the draft angle has minimal impact on formability.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Chemistry, Physical
Jing Chen, Runlin Fan, Yuhang Peng, Nan Qin, Liming Jin, Junsheng Zheng, Pingwen Ming, Cunman Zhang, Jim P. Zheng
Summary: Composite bipolar plates (CBPs) are promising materials for PEMFC with mechanical strength, electrical conductivity and chemical stability. This study introduces epoxy (EP) into phenol-formaldehyde (PF) resin as adhesive for CBP, resulting in PF-EP-CBP with enhanced flexibility. The obtained PF-EP-CBP exhibits significantly improved flexural strength and meets the 2025 DOE targets. This study provides a novel insight and convenient method for adhesive tailoring, which is significant for the practical development of CBPs in PEMFC fields.
JOURNAL OF POWER SOURCES
(2023)
Article
Polymer Science
Dmitriy E. Burmistrov, Dmitriy A. Serov, Aleksander Simakin, Ilya Baimler, Oleg Uvarov, Sergey Gudkov
Summary: Nanoparticle coatings are effective in inhibiting bacterial contamination and can provide long-term antibacterial effects. In this study, a coating containing aluminum oxide nanoparticles was successfully produced using polytetrafluoroethylene as a polymer matrix. These coatings exhibited good biocompatibility and mechanical properties, preventing bacterial growth and eliminating micro damages in the food production process.
Article
Chemistry, Physical
Junji Xuan, Likun Xu, Shuangfeng Bai, Ting Zhao, Yonglei Xin, Guodong Zhang, Lili Xue, Li Li
Summary: The effects of temperature on the corrosion behavior, wettability, and surface conductivity of SS304 in a simulated PEMFC cathode environment were systematically investigated. The corrosion resistance decreased with temperature, but still met the DOE technical target. Surface wettability and ICR increased with temperature, while surface conductivity needed improvement through surface modification to meet the 2025 DOE target.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Physics, Applied
Heping Huang, Chang Gao, Guogang Yang, Naibao Huang
Summary: By fabricating a carbon film on thin stainless steel using laser direct writing technology, the anti-corrosion performance of thin stainless steel bipolar plates of proton exchange membrane fuel cell (PEMFC) can be significantly improved.
MODERN PHYSICS LETTERS B
(2022)
Article
Chemistry, Physical
Tianyu Chen, Zhibin Lu, Guangjin Zeng, Yongmin Xie, Jie Xiao, Zhifeng Xu
Summary: The study introduces a high-performance LSGM electrolyte-supported tubular DC-SOFC stack for portable applications, which shows great potential in developing into high-performing, efficient, and environmentally friendly portable power sources for distributed applications.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Wenbin Tong, Yili Chen, Shijie Gong, Shaokun Zhu, Jie Tian, Jiaqian Qin, Wenyong Chen, Shuanghong Chen
Summary: In this study, a three-dimensional porous NiO interface layer with enhanced anode dynamics is fabricated, forming a Schottky contact with the zinc substrate, allowing rapid and uniform zinc plating both inside and below the interface layer. The resulting NiO@Zn exhibits exceptional stability and high capacity retention.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yafeng Bai, Kaidi Li, Liying Wang, Yang Gao, Xuesong Li, Xijia Yang, Wei Lu
Summary: In this study, a flexible zinc ion supercapacitor with gel electrolytes, porous alpha-MnO2@reduced graphene oxide cathode, and activated carbon/carbon cloth anode was developed. The device exhibits excellent electrochemical performance and stability, even at low temperatures, with a high cycle retention rate after 5000 cycles.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Anmol Jnawali, Matt D. R. Kok, Francesco Iacoviello, Daniel J. L. Brett, Paul R. Shearing
Summary: This article presents the results of a systematic study on the electrochemical performance and mechanical changes in two types of commercial batteries with different anode chemistry. The study reveals that the swelling of anode layers in batteries with silicon-based components causes deformations in the jelly roll structure, but the presence of a small percentage of silicon does not significantly impact the cycling performance of the cells within the relevant state-of-health range for electric vehicles (EVs). The research suggests that there is room for improving the cell capacities by increasing the silicon loading in composite anodes to meet the increasing demands on EVs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yohandys A. Zulueta, My Phuong Pham-Ho, Minh Tho Nguyen
Summary: Advanced atomistic simulations were used to study ion transport in the Na- and K-doped lithium disilicate Li2Si2O5. The results showed that Na and K doping significantly enhanced Li ion diffusion and conduction in the material.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Zongying Han, Hui Dong, Yanru Yang, Hao Yu, Zhibin Yang
Summary: An efficient phase inversion-impregnation approach is developed to fabricate BaO-decorated Ni8 mol% YSZ anode-supported tubular solid oxide fuel cells (SOFCs) with anti-coking properties. BaO nanoislands are successfully introduced inside the Ni-YSZ anode, leading to higher peak power densities and improved stability in methane fuel. Density functional theory calculations suggest that the loading of BaO nanoislands facilitates carbon elimination by capturing and dissociating H2O molecules to generate OH.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Suresh Mamidi, Dan Na, Baeksang Yoon, Henu Sharma, Anil D. Pathak, Kisor Kumar Sahu, Dae Young Lee, Cheul-Ro Lee, Inseok Seo
Summary: Li-CO2 batteries, which utilize CO2 and have a high energy density, are hindered in practical applications due to slow kinetics and safety hazards. This study introduces a stable and highly conductive ceramic-based solid electrolyte and a metal-organic framework catalyst to improve the safety and performance of Li-CO2 batteries. The optimized Li-CO2 cell shows outstanding specific capacity and cycle life, and the post-cycling analysis reveals the degradation mechanism of the electrodes. First-principles calculations based on density functional theory are also performed to understand the interactions between the catalyst and the host electrode. This research demonstrates the potential of MOF cathode catalyst for stable operation in Li-CO2 batteries.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Ganghua Xiang, Zhihuan Qiu, Huilong Fei, Zhigang Liu, Shuangfeng Yin, Yuen Wu
Summary: In this study, a CeFeOx-supported Pt single atoms and subnanometric clusters catalyst was developed, which exhibits enhanced catalytic activity and stability for the preferential oxidation of CO in H2-rich stream through synergistic effect.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Dimitrios Chatzogiannakis, Marcus Fehse, Maria Angeles Cabanero, Natalia Romano, Ashley Black, Damien Saurel, M. Rosa Palacin, Montse Casas-Cabanas
Summary: By coupling electrochemical testing to operando synchrotron based X-ray absorption and powder diffraction experiments, blended positive electrodes consisting of LiMn2O4 spinel (LMO) and layered LiNi0.5Mn0.3Co0.2O2 (NMC) were studied to understand their redox mechanism. It was found that blending NMC with LMO can enhance energy density at high rates, with the blend containing 25% LMO showing the best performance. Testing with a special electrochemical setup revealed that the effective current load on each blend component can vary significantly from the nominal rate and also changes with SoC. Operando studies allowed monitoring of the oxidation state evolution and changes in crystal structure, in line with the expected behavior of individual components considering their electrochemical current loads.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Chiara Cementon, Daniel Dewar, Thrinathreddy Ramireddy, Michael Brennan, Alexey M. Glushenkov
Summary: This Perspective discusses the specific power and power density of lithium-ion capacitors, highlighting the fact that their power characteristics are often underestimated. Through analysis, it is found that lithium-ion capacitors can usually achieve power densities superior to electrochemical supercapacitors, making them excellent alternatives to supercapacitors.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Weihao Wang, Hao Yu, Li Ma, Youquan Zhang, Yuejiao Chen, Libao Chen, Guichao Kuang, Liangjun Zhou, Weifeng Wei
Summary: This study achieved an improved electrolyte with excellent low-temperature and high-voltage performance by regulating the Li+ solvation structure and highly concentrating it. The electrolyte exhibited outstanding oxidation potential and high ionic conductivity under low temperature and high voltage conditions, providing a promising approach for the practical application of high-voltage LIBs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Martin Bures, Dan Gotz, Jiri Charvat, Milos Svoboda, Jaromir Pocedic, Juraj Kosek, Alexandr Zubov, Petr Mazur
Summary: Vanadium redox flow battery is a promising energy storage solution with long-term durability, non-flammability, and high overall efficiency. Researchers have developed a mathematical model to simulate the charge-discharge cycling of the battery, and found that hydraulic connection of electrolyte tanks is the most effective strategy to reduce capacity losses, achieving a 69% reduction.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
M. Rodriguez-Gomez, J. Campo, A. Orera, F. de La Fuente, J. Valenciano, H. Fricke, D. S. Hussey, Y. Chen, D. Yu, K. An, A. Larrea
Summary: In this study, we analysed the operando performance of industrial lead cells using neutron diffraction experiments. The experiments revealed the evolution of different phases in the positive electrode, showed significant inhomogeneity of phase distribution inside the electrode, and estimated the energy efficiency of the cells.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Jiawei Liu, Chenpeng Wang, Yue Yao, Hao Ye, Yinglong Liu, Yingli Liu, Xiaoru Xu, Zhicong Chen, Huazheng Yang, Gang Wu, Libin Lei, Chao Wang, Bo Liang
Summary: The study focuses on utilizing double conductive Ni-pads as anode collectors in micro-tubular solid oxide fuel cells. The simulation results show excellent performance and stability of DCNPs, and also highlight the potential applications in various fields.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yang Wang, Kangjie Zhou, Lang Cui, Jiabing Mei, Shengnan Li, Le Li, Wei Fan, Longsheng Zhang, Tianxi Liu
Summary: This study presents a polyimide sandwiched separator (s-PIF) for improving the cycling stability of Li-metal batteries. The s-PIF separator exhibits superior mechanical property, electrolyte adsorption/retention and ion conductivity, and enables dendrite-free Li plating/stripping process.
JOURNAL OF POWER SOURCES
(2024)