Article
Polymer Science
Deep Shikha, Monica Kumari, Anuradha Mohanty, Ashwini Kumar Singh, Sanjay Kumar Sinha
Summary: The study showed that PVA/HAP composite materials have excellent corrosion resistance, with better performance compared to HAP. The interesting microstructure features are closely related to corrosion resistance, which is important for the application of hard tissue implants.
JOURNAL OF POLYMER ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Sankar Rajan, K. Marimuthu, C. Balaji Ayyanar, Md Enamul Hoque
Summary: The newly developed PVA-PEG-HAp thin membrane is a biocompatible alternative for biofilms in medical applications, providing potential for bone tissue regeneration.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Polymer Science
Marwa H. Gouda, Noha A. Elessawy, Arafat Toghan
Summary: In this study, a binary polymer blend of PEO and PVA was formulated and doped with phosphated titanium oxide nanotube (PO4TiO2) to enhance the performance of a direct borohydride fuel cell. The addition of PO4TiO2 improved the ionic conductivity and power density of the membranes, while also increasing their oxidative stability and tensile strength. The fabricated membrane showed higher selectivity compared to Nafion117 and could serve as an efficient proton exchange membrane for green and low-cost DBFCs.
Article
Chemistry, Physical
Fabrice Asonkeng, Gael Maranzana, Julien Proust, Manuel Francois, Lea Le Joncour, Jerome Dillet, Sophie Didierjean, Guillaume Braesch, Marian Chatenet, Thomas Maurer
Summary: The fabrication of electrocatalysts for fuel cells with long life and low noble metal consumption continues to be a major challenge. This study presents a chemical synthesis process for single-step synthesis and direct deposition of gold, palladium, and platinum nanoparticles onto a carbon-fibers-based porous transport layer (PTL). The methodology was validated through SEM and XRD characterization, and demonstrated that an optimum loading of platinum below 0.16 mg Pt / cm2 achieved the best compromise between power density and faradic efficiency for the borohydride oxidation reaction (BOR). These Pt-coated PTL materials combine high performance with very low metal loading, promising cost reduction.
APPLIED CATALYSIS A-GENERAL
(2021)
Article
Materials Science, Ceramics
Manickam Chozhanathmisra, Loganathan Murugesan, Arukkani Murugesan, Govindasamy Palanisamy, Rangappan Rajavel
Summary: Bone tissue engineering is an attractive field of research due to the increasing number of orthopedic diseases and injuries. This study aimed to observe bone formation and osseointegration on different composite-coated implant surfaces. The results showed that the developed biocomposite coating improved both mechanical and biological properties.
CERAMICS INTERNATIONAL
(2022)
Article
Polymer Science
Marwa H. Gouda, Noha A. Elessawy, Sami A. Al-Hussain, Arafat Toghan
Summary: The study demonstrates that incorporating super-acidic sulfated zirconia into a binary polymer blend can enhance the physicochemical properties of composite membranes, leading to increased power density and decreased permeability and swelling ratio. Membranes with 7.5% SO4ZrO2 exhibit power density close to that of commercial Nafion117, highlighting the promising future applications of cost-effective and eco-friendly DBFC membranes.
Article
Chemistry, Multidisciplinary
Marwa H. Gouda, Noha A. Elessawy, Arafat Toghan
Summary: A novel nanocomposite membrane was developed by doping zirconiam phosphate into a binary polymer blend, leading to improved oxidative stability, tensile strength, ionic conductivity and power density. The membranes with 5 wt.% of ZrPO4 showed the best performance, making them efficient for use in proton exchange membranes for the development of green and low cost DBFCs.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Chemistry, Physical
Santanu Dey, Chandan Kumar Raul, Riju Karmakar, Arghya Chatterjee, Ajit Kumar Meikap, Soumen Basu
Summary: MWCNT-supported Ag and Cu@Ag bimetallic core-shell nanoparticles were prepared and characterized as anode electrocatalysts for borohydride oxidation. Carbon-supported Cu@Ag core-shell nanoparticles were also prepared and compared for their electrocatalytic activity. The results showed that MWCNT-supported Cu@Ag and Ag nanoparticles exhibited better electrocatalytic performance than carbon-supported Cu@Ag/C catalysts for the oxidation of borohydride. Cu@Ag/MWCNT demonstrated the best electrocatalytic performance with significantly higher borohydride oxidation current density compared to Cu@Ag/C.
Article
Materials Science, Paper & Wood
Zhijun Zhou, Yongbo Yao, Junfeng Zhang, Liangen Shen, Huawei Xu, Jie Liu, Baoqing Shentu
Summary: The study revealed that TEMPO-CNF/PVA suspension exhibits pseudoplastic fluidity and thixotropic behavior, with the viscosity affected by PVA concentration and interactions between cellulose fibrils and PVA molecules. The entangled network and hydrogen bond interactions play a crucial role in adjusting the viscosity of TEMPO-CNF suspensions.
Article
Polymer Science
Kalidas Sabareeswari, Narayanan Valarmathi, Narayana Samy Arunai Nambiraj, Shanmugam Sumathi
Summary: This study successfully prepared cerium/silver substituted hydroxyapatite (Ce/Ag-HAP) and incorporated it into polyvinyl alcohol (PVA)/carboxy methylcellulose (CMC) composite. The composites showed enhanced mechanical strength and antibacterial activity.
Article
Energy & Fuels
Olalekan S. Alade, Dhafer Al Shehri, Mohamed Mahmoud, Esmail M. A. Mokheimer, Jafar Al Hamad, Muhammad Shahzad Kamal, Ayman Al-Nakhli, K. Sasaki
Summary: This study presents a novel enhanced oil recovery approach using PVA solution and PVA-NaOH mixtures for in situ emulsification of heavy oil. Experimental results demonstrate that the PVA-NaOH mixture can significantly improve emulsification of heavy oil and achieve higher oil recovery rates.
Article
Chemistry, Physical
Donghong Duan, Jiarong Feng, Xiu You, Xianxian Zhou, Yunfang Wang, Liang Chen, Shibin Liu
Summary: Carbon-supported Co-Au bimetallic nanoparticles with different Co/Au atomic ratios were prepared and studied as anode electrocatalysts for borohydride electrooxidation. The Co-4-Au-1/C catalyst showed the highest catalytic activity and lowest electrochemical impedance, making it an efficient anode catalyst for direct borohydride-hydrogen peroxide fuel cell with significantly increased power density compared to Au/C catalyst.
Article
Chemistry, Physical
Riyi Chen, Songsheng Zheng, Yudong Yao, Zhibin Lin, Wei Ouyang, Lianghui Zhuo, Zhaolin Wang
Summary: Through investigating the performance of a direct ammonia fuel cell, it was found that the PtIr/C alloy catalyst achieved the highest peak power density and open-circuit voltage, but also showed a correlation between ammonia permeation and cathode catalyst degradation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Environmental
Ying Yang, Xiaofei Zhu, Caini Yi, Hang Yang, Xiaolong Hou, Xuan Liao, Changguo Chen, Danmei Yu, Xiaoyuan Zhou
Summary: NiFe-x binary alloy catalysts were prepared by one-step potentiostatic electrodeposition, and the effects of Fe introduction on the morphology, structure, and electrochemical properties were investigated. The results showed that the appropriate introduction of Fe could refine the size of the catalyst particles, increase effective catalytic active sites, and improve catalytic activity. It also changed the electron distribution of Ni, enhancing the adsorption to reactants and inhibiting hydrogen evolution reaction, leading to increased catalytic selectivity. When assembled with the NiFe-2 catalyst anode, the direct borohydride fuel cell achieved a peak power density of 540 mW cm-2 and an open circuit voltage of 1.87 V at 298 K. This study may provide new insights for the design and development of efficient noble metal-free anode catalysts for DBFC.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Rajender Singh Malik, Udit Soni, Sampat Singh Chauhan, Devendra Kumar, Veena Choudhary
Summary: Proton conducting membranes of PVA-FNCs/SPEEK were synthesized by solution casting, exhibiting good proton conductivity and enhanced fuel cell performance. The addition of SPEEK and the crosslinking of PVA-FNCs were found to be key factors affecting the properties of the membranes. The semi-interpenetrating network membranes showed promising potential for applications in fuel cell technology.
MATERIALS TODAY COMMUNICATIONS
(2021)
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)