Article
Engineering, Chemical
Weitong Pan, Zhekun Chen, Xueli Chen, Fuchen Wang, Gance Dai
Summary: The continuous roll-to-roll slot die coating technique has shown great potential for fuel cell electrode fabrication. Analysis and simulation have been used to determine the particulate coating window, and the results show the impact of flow pattern transition and fluid parameters on the coating process.
Article
Engineering, Chemical
Myungjae Lee, Kyounghun Shin, Jaewook Nam
Summary: Shear thinning and yield stress are important rheological properties in coating liquids. The Herschel-Bulkley constitutive equation can represent them well. Visualization of slot-coating flows was done using Carbopol polymer solutions as a model. The effect of yield stress was significant in thin coatings, while shear thinning had a remarkable impact due to heavily curved shear rate profile.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Tiezhu Guo, Di Zhou, Min Gao, Shungui Deng, Mohammad Jafarpour, Jonathan Avaro, Antonia Neels, Erwin Hack, Jing Wang, Jakob Heier, Chuanfang (John) Zhang
Summary: Large-area uniform transparent conductive electrodes (TCEs) with excellent optoelectronic performance have been achieved for the first time using solution-processed Ti3C2Tx MXene aqueous inks. The conductive MXene nanosheets are forced to orientate horizontally during the slot-die coating process, resulting in highly aligned MXene TCEs without percolation issues.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jingwei Xue, Heng Zhao, Baojun Lin, Yilin Wang, Qinglian Zhu, Guanyu Lu, Baohua Wu, Zhaozhao Bi, Xiaobo Zhou, Chao Zhao, Guanghao Lu, Ke Zhou, Wei Ma
Summary: Organic solar cells (OSCs) have shown great potential, but traditional methods and toxic solvents limit their commercialization and efficiency. A dual-slot-die sequential processing (DSDS) strategy is proposed to overcome these limitations. The unique film-formation mechanism contributes to the improved performance.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Yibo Tu, Jingchuan Ye, Gaoyuan Yang, Yue Zang, Lijian Zhang, Yu Wang, Guodong Li, Liang Chu, Wensheng Yan
Summary: Despite the significant progress in perovskite solar cells (PSCs), challenges remain for their commercialization, including stability issues and the lack of high-throughput production capability. Slot-die coating technology stands out as the most promising method for upscaling PSCs due to its compatibility with roll-to-roll production. PSCs are advancing rapidly towards commercialization, and this review article focuses on the research progress of slot-die-based PSCs and the challenges in their future development.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Jaswinder Sharma, Xiang Lyu, Tatyana Reshetenko, Georgios Polizos, Kelsey Livingston, Jianlin Li, David L. Wood, Alexey Serov
Summary: The series of electrodes for proton exchange membrane fuel cell (PEMFC) application were successfully fabricated using a scalable and manufacturable slot-die coating method. The obtained electrodes were uniform and homogeneous with minimum defects, and the electrochemical evaluation showed close characteristics for all samples, confirming the reproducibility of the process. The study also found that decreased membrane thickness favored the performance of the membrane electrode assemblies.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
You-Hyun Seo, Se-Phin Cho, Hyun-Jung Lee, Yu-Jin Kang, Sung-Nam Kwon, Seok-In Na
Summary: The main challenge in the field of perovskite solar cells is to transform lab-scale processes into industry-related processes for commercialization. The hot slot-die coating method provides a simple and efficient way to fabricate perovskite films, achieving high power conversion efficiency and device performance by controlling temperature and coating speed.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Multidisciplinary
Prem Jyoti Singh Rana, Benny Febriansyah, Teck Ming Koh, Bening Tirta Muhammad, Teddy Salim, Thomas J. N. Hooper, Anil Kanwat, Biplab Ghosh, Priyanka Kajal, Jia Haur Lew, Yeow Chong Aw, Natalia Yantara, Annalisa Bruno, Sumod A. Pullarkat, Joel W. Ager, Wei Lin Leong, Subodh G. Mhaisalkar, Nripan Mathews
Summary: A seed-assisted crystallization approach using alkali salts has been demonstrated to enable the fabrication of large-area and highly crystalline perovskite films. The slot-die coated perovskite films show improved optoelectronic properties and stability.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Energy & Fuels
Yameen Ahmed, Deepak Thrithamarassery Gangadharan, Mohammad Reza Kokaba, Vishal Yeddu, Muhammad Awais, Dongyang Zhang, Vahid Kamraninejad, Makhsud I. Saidaminov
Summary: In this study, perovskite solar cells (PSCs) were fabricated using scalable methods in ambient air, achieving high efficiency and excellent tolerance to oxygen and moisture. The use of a resurfacing strategy improved charge carrier recombination and the devices showed stable performance without encapsulation.
Article
Engineering, Multidisciplinary
Chin-Cheng Wang, Yan-Yang Zheng
Summary: Slot-die coating technology is a promising technique for the development of integrated circuits. This study used ANSYS Fluent to investigate slot-die coating for different die lip configurations and compared the results with experimental data. Results showed consistent findings at low coater speeds and mass flow rates, but significant discrepancies at high speeds and pump flow rates.
JOURNAL OF THE CHINESE INSTITUTE OF ENGINEERS
(2021)
Article
Chemistry, Multidisciplinary
Neha Chaturvedi, Nicola Gasparini, Daniel Corzo, Jules Bertrandie, Nimer Wehbe, Joel Troughton, Derya Baran
Summary: Slot-die coating is utilized to fabricate fully solution processed organic solar cells, achieving high efficiency and stability. Demonstrated inverted OSCs and semi-transparent OSCs using solution processed Ag nanowire electrodes showcased the scalability and reproducibility of the technique.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Applied
Jin Seok Park, Taehyung Yoo, Byoungjin Chun, Kwan-Young Lee, Hyun Wook Jung
Summary: The study investigated the operability windows and coating bead dynamics of a dual-layer slot coating process with non-Newtonian coating liquids using the viscocapillary model, CFD simulations, and experiments. Results showed that the viscocapillary model was able to accurately track the upstream meniscus position in the coating bead region. The onset of coating defects like leaking, bead break-up, and mid-gap invasion is strongly influenced by the rheological properties of Carreau-type coating liquids and the flow ratio between layers.
JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH
(2022)
Article
Computer Science, Hardware & Architecture
Gieun Kim, Jeongpil Na, Mose Jung, Jongwoon Park
Summary: In this study, we optimized the structure of slot-die heads for achieving highly uniform large-area organic thin films for potential applications in OLEDs. Computational fluid dynamics simulation was used to analyze the pressure and velocity distributions inside the cavity by varying the structure parameters. The maximum shim thickness was derived from the simulation results, providing a design guideline. We successfully coated low-viscosity and high-viscosity materials and achieved thin films with good thickness uniformity. OLED devices were fabricated with the coated PEDOT:PSS layer, showing promising performance.
Article
Green & Sustainable Science & Technology
Mahmoud E. Farahat, Gregory C. Welch
Summary: This study successfully fabricated large-area organic photochromic films and UV filters using the slot-die coating solution processing method, demonstrating their excellent performance in photochromism and UV blocking.
ADVANCED SUSTAINABLE SYSTEMS
(2022)
Article
Engineering, Chemical
Hyungyeol Kwak, Jaewook Nam
Summary: This study investigates the influence of the coating gap on the maximum and minimum wet thicknesses in slot-die coating process, and establishes a simple flow model with analytical expressions. The results show that the minimum wet thickness increases linearly with the coating gap, while the maximum wet thickness exhibits a counterintuitive trend of decreasing with the increasing coating gap under a specific slot-die configuration.
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)