Article
Energy & Fuels
M. S. Alias, S. K. Kamarudin, A. M. Zainoodin, M. S. Masdar
Summary: This study presents a surface characterization of the modified MPL of TiO2-CNF-CB and discusses in detail the mechanism on the power density drop due to increment of methanol concentration. The study also tests the performance and stability of the modified MPL. The results show that the mixture of TiO2-CNF-CB improved the stability of the DMFC over long-term performance testing.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Energy & Fuels
Hazlina Junoh, Juhana Jaafar, Nik Abdul Hadi M. Nordin, Ahmad F. Ismail, Mohd H. D. Othman, Mukhlis A. Rahman, Farhana Aziz, Norhaniza Yusof, Syarifah Noor S. Sayed Daud
Summary: Porous poly ether sulfone (PES) membranes were prepared using two different solvents via dry/wet non-solvent phase inversion techniques, with membranes prepared using DMAc at 3 minutes solvent evaporation time showing desirable properties for proton conduction and methanol resistance.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Jing Wu, Meng Li, Yang Zhou, Chuanchuan Lin, Jixi Zhang, Kaiyong Cai
Summary: Corrosion is a major reason for the failure of metallic implants. The presence of bone marrow derived mesenchymal stem cells (BMSCs) can decrease the stability of 316 L stainless steels (316 L SS), leading to preferential pitting corrosion initiation at the peripheries of BMSCs.
Article
Chemistry, Physical
Abdullah Alrashidi, Hongtan Liu
Summary: Novel anode gas diffusion layers (AGDLs) with both hydrophobic and hydrophilic pathways were created by perforating PTFE-treated AGDLs with laser, enhancing both methanol and CO2 transfer. The main reason for the 32% cell performance improvement was reduction in mass transfer resistance and enhanced methanol transfer to the catalyst layer. However, excessive perforations may increase methanol crossover and decrease cell performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Thermodynamics
Shuo Fang, Yuntao Liu, Chunhui Zhao, Lilian Huang, Zhi Zhong, Yun Wang
Summary: A micro direct methanol fuel cell (mu DMFC) stack model was developed in this paper using the Debye-Huckel ionic atmosphere theory, with verified experimental results showing a lower error compared to traditional models. Increasing cathodic oxygen concentration and temperature can improve output power and reduce coupling forces, leading to a voltage peak during unloading. Energy loss caused by methanol crossover decreases during dynamic operating process, indicating a relatively high dynamic energy conversion efficiency.
Article
Materials Science, Coatings & Films
Musharaf Abbas, Gregory M. Smith, Paul R. Munroe
Summary: Ni feedstock particles were deposited on a grit-blasted stainless-steel substrate using the HVOF process to investigate the flattening behavior and bonding features on a rough surface. The study found that fully melted splats exhibited good flattening performance and efficient bonding with the substrate surface, revealing elemental interdiffusion across the splat-substrate interface.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Jie Mei, Guangya Hou, Huibin Zhang, Qiang Chen, Huazhen Cao, Yiping Tang, Jianli Zhang, Guoqu Zheng
Summary: The porous dendritic NiCu@PPy/316L stainless steel mesh electrode was prepared using dynamic hydrogen bubble template electrodeposition and cyclic voltammetry electrodeposition of polypyrrole (PPy) conductive polymer. The dynamic hydrogen bubbles successfully assisted the formation of porous structures in the Ni-based deposition layer. Furthermore, the morphology of the resulting Ni-based layer evolved into dendritic with high specific surface area after Cu doping. Eventually, 2-NiCu/SSM achieved current densities of 294.5 mA·cm(-2) (MOR) and 278.6 mA·cm(-2) (UOR) at 0.8 V, respectively. The PPy coating prevented the agglomeration of NiCu particles in the catalytic layer and improved the persistence of the electrochemical performance. After 2000 cycles, the current densities of 2-NiCu @PPy/SSM in the new electrolyte were maintained at 89.1% (MOR) and 94.8% (UOR) of the original value, with a 10% increase for MOR and a 7% increase for UOR compared to the sample without PPy coating (2-NiCu /SSM).
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Matej Klas, Peter Cermak, Arian Fateh Borkhari, Leonid Satrapinskyy, Stefan Matejcik, Branislav Radjenovic, Marija Radmilovic-Radjenovic
Summary: This study examines the variation of physical properties of vacuum breakdown in microgaps under different pulsed electric field conditions. Through analysis and calculation of multiple pre-breakdown stages, the dominant mechanism of electron emission was determined.
Article
Chemistry, Multidisciplinary
Siti Hasanah Osman, Siti Kartom Kamarudin, Sahriah Basri, Nabila A. Karim
Summary: Fuel cells have shown great potential for green energy generation, but their low reaction performance hinders large-scale commercial manufacturing. This study focuses on a new fabrication method for a TiO2-graphene aerogel (TiO2-GA) supporting PtRu catalyst, which is simple, environmentally friendly, and cost-effective. The experimental outcomes demonstrate that PtRu/TiO2-GA offers higher surface area and better performance than commercial PtRu/C catalysts.
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
Materials Science, Multidisciplinary
Santosh Prasad Sah
Summary: The evolution of electrochemical impedance and corrosion products was studied on 310S stainless steel in a carbonate melt at 650 degrees C under flowing CO2-2%O2 gas for 600 hours. The corrosion process involved the formation and dissolution of oxides, exposing metallic fragments and resulting in a porous inner layer. Insufficient protection from the outer layer led to continued corrosion.
Article
Chemistry, Physical
Wu Yujing, Zhou Hongxiu, Zhang Ao, Zhao Leqing
Summary: The research shows that flowing electrode direct methanol fuel cell (FEDMFC) effectively reduces methanol crossover rate while maintaining high power densities. Increasing flow rate can decrease crossover rate but will affect efficiency and stability, with optimal flow rate controlled at 1-3 sccm.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Applied
Xiaojun Yin, Leilei Xu, Hao Duan, Yingying Wang, Xibin Wang, Ke Zeng, Ying Wang
Summary: An experimental comparison between port injection and direct injection of methanol in diesel engines was conducted to study the effects on fuel-air mixing and combustion. The results showed that direct injection had a more controllable heat release and better fuel economy, but higher NOx and HC emissions compared to port injection.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Zhengang Zhao, Ziten Wang, Kang Li, Dacheng Zhang
Summary: In this study, a novel Membrane Electrode Assembly (MEA) structure using Foam Stainless Steel (FSS) for the diffusion layer and current collector of a Micro Direct Methanol Fuel Cell (μDMFC) was designed. Experimental results showed that the FSS-MEA μDMFC exhibited higher maximum power density and optimum working concentration compared to the Conventional Carbon Paper Membrane Electrode Assembly (CCP-MEA) μDMFC. Furthermore, the FSS-MEA structure reduced the contact and mass transfer impedance, leading to improved power density of the μDMFC.
Article
Energy & Fuels
Qidong Xu, Meng Ni
Summary: A 2D numerical model was developed to study a tubular direct methanol SOFC, with parameters such as temperature, thickness, and length having significant effects on performance. Increasing temperature enhances cell performance, while other parameters also play important roles in optimizing SOFC performance.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Shiro Tanaka, Toshio Shudo
JOURNAL OF POWER SOURCES
(2015)
Article
Thermodynamics
T. Shudo
INTERNATIONAL JOURNAL OF ENGINE RESEARCH
(2008)
Article
Thermodynamics
T. Shudo, T. Nakajima, K. Hiraga
INTERNATIONAL JOURNAL OF ENGINE RESEARCH
(2009)
Article
Thermodynamics
T. Shudo, K. Toshinaga
INTERNATIONAL JOURNAL OF ENGINE RESEARCH
(2010)
Article
Chemistry, Physical
Toshio Shudo, Kento Omori, Osamu Hiyama
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2008)
Article
Chemistry, Physical
Toshio Shudo, Shuji Oba
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2009)
Article
Chemistry, Physical
Toshio Shudo, Yosuke Shima, Tatsuya Fujii
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2009)
Article
Chemistry, Physical
Anh Tuan Pham, Tomohiro Baba, Toshio Shudo
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2013)
Article
Chemistry, Physical
Anh Tuan Pham, Tomohiro Baba, Tatsuki Sugiyama, Toshio Shudo
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2013)
Article
Chemistry, Physical
Tetsuro Kariya, Tomoki Hirono, Hiroshi Funakubo, Toshio Shudo
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2014)
Article
Chemistry, Physical
Shiro Tanaka, Toshio Shudo
JOURNAL OF POWER SOURCES
(2014)
Article
Chemistry, Physical
Shiro Tanaka, Toshio Shudo
JOURNAL OF POWER SOURCES
(2014)
Article
Chemistry, Physical
Toshio Shudo
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2007)
Article
Transportation Science & Technology
Tie Li, Hiroyuki Izumi, Toshio Shudo, Hideyuki Ogawa
SAE INTERNATIONAL JOURNAL OF FUELS AND LUBRICANTS
(2009)
