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
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
Tae Hoon Lee, Su Sang Yu, Taek Hyun Oh
Summary: Direct borohydride-hydrogen peroxide fuel cells (DBHPFCs) are considered as attractive power sources for space applications. This study investigated the effects of various anode conditions, such as electrocatalyst, fuel concentration, and stabilizer concentration, on the performance of a DBHPFC system. The results showed that the anode electrocatalyst had a significant impact on the mass and electrochemical reaction rate of the system, while the fuel concentration mainly affected the mass and decomposition reaction rate. The NaOH concentration influenced the electrochemical reaction rate, decomposition reaction rate, and mass of the fuel cell system.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Bihao Hu, Chuanlan Xu, Peng Chen, Jingjing Yu, Bingbing Hu, Qin Xiang, Yuan Cen, Yuping Liu, Danmei Yu, Changguo Chen
Summary: In this study, Ni catalysts with preferred orientation and microsphere structure were fabricated using a simple one-step pulsed voltage electrodeposition method, and their crystal plane orientation and catalytic activity towards borohydride oxidation reaction (BOR) were systematically investigated. The results showed that adjusting the pulse anode potential can effectively control the morphology and crystal plane orientation of Ni catalysts. The optimal NiPVE0.15 catalyst exhibited the highest catalytic activity and fuel efficiency.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Review
Chemistry, Physical
Dongming Zhang, Tong Sun, Dianxue Cao, Youzhi Liu, Weizhou Jiao, Guiling Wang
Summary: This paper provides an updated review of the effects of electrode design and the modulation of the catalytic environment on the anode of DBFCs. Breakthroughs in catalytic activity and mitigation of side reactions are critical for solving the current challenges in borohydride oxidation catalysis.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Yu-e Duan, Sai Li, Qiang Tan, Yuanzhen Chen, Kunyang Zou, Xin Dai, Maryam Bayati, Ben B. Xu, Laurent Dala, Terence Xiaoteng Liu
Summary: The article introduces a unique cobalt nickel boride nanocomposite with outstanding catalytic activity and long-term durability for borohydride electrooxidation reaction.
This nanocomposite achieved high power density in a miniature direct borohydride fuel cell and has the potential for cost reduction and scale-up production.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Inorganic & Nuclear
Xiaojing Liu, Jiupai Ni, Chengsheng Ni
Summary: This study evaluates non-perovskite oxides as cathodes for CO2 electrolysis and finds that molybdenum doping can enhance the electrochemical performance by forming oxygen-deficient rutile phase.
INORGANIC CHEMISTRY
(2023)
Article
Green & Sustainable Science & Technology
Arife Uzundurukan, Elif Seda Akca, Yagmur Budak, Yilser Devrim
Summary: In this study, carbon nanotube-graphene supported PtAu, Au and Pt catalysts were prepared and tested in a liquid-fed NaBH4/H2O2 fuel cell. The PtAu/CNT-G catalyst showed enhanced performance with a maximum power density of 139 mW/cm(2) at 50 degrees Celsius.
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
Chemistry, Physical
Hua Zhang, Wu Liu, Jianxin Wang, Jun Yang, Yu Chen, Wanbing Guan, Subhash C. Singhal
Summary: Direct internal dry reforming of methane for power generation in a flat-tube solid oxide fuel cell with symmetric double-sided cathodes has been investigated, showing high conversion rates of methane and a durable cell operation for 500 hours at 750 degrees C. The unique cell configuration and Ni/YSZ catalysts granules placed in the internal fuel channels can alleviate coking and improve the durability of cells, enabling the direct utilization of methane for power generation.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Multidisciplinary
Bingxin Zhou, Ivan Stosevski, Arman Bonakdarpour, David P. Wilkinson
Summary: This study investigates the effects of salt concentration and solvents on the lithium corrosion behavior in anode-free lithium metal batteries (AFLMBs). The results show that increasing salt concentration suppresses chemical corrosion but exacerbates galvanic corrosion. The key to effectively suppressing both types of corrosion lies in promoting the coordination of less-soluble particles and polymers within the solid-electrolyte interface (SEI).
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Chemistry, Physical
Alexandr Oshchepkov, Antoine Bonnefont, Gael Maranzana, Elena R. Savinova, Marian Chatenet
Summary: Direct borohydride fuel cells face challenges in achieving high efficiency, including the selection of suitable catalysts, optimization of reaction conditions, and the choice of appropriate membrane materials.
CURRENT OPINION IN ELECTROCHEMISTRY
(2022)
Article
Nanoscience & Nanotechnology
Mengtian Shi, Yongjiang Hou, Xiaohan Du, Jie Guo, Bo Li, Yixuan Li
Summary: In this study, Co nanoparticles on graphene carriers were replaced with nickel atoms through Galvanic Replacement Reaction to form highly dispersed two-dimensional (2D)/2D Ni-Co nanolayers. The characterization analyses confirmed the ultrathin nanolayer structures of the catalysts and their good hydrogen generation performance, with a high rate and maintenance of activity after multiple cycles.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Bihao Hu, Jingjing Yu, Jiazhi Meng, Chuanlan Xu, Jinliang Cai, Biao Zhang, Yuping Liu, Danmei Yu, Xiaoyuan Zhou, Changguo Chen
Summary: The morphology of the Ni-Cu alloy is strongly influenced by the Cu2+ concentration, and the Ni-np@NC catalyst shows excellent selectivity and activity towards the borohydride oxidation reaction. The direct borohydride fuel cell with Ni-np@NC/C anode exhibits high efficiency and power density.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Review
Chemistry, Multidisciplinary
Ying Zhang, Xiao Tian, Mingyue Ji, Gerile Naren, Xiaojie Zhang, Jiale Han
Summary: This paper reviews the research achievements of transition metal catalysts for direct borohydride fuel cells (DBFC) in the past 20 years. Through literature studies, it is found that the research results related to Ni-based, Co-based, and their composite transition metal catalysts are the most abundant, and transition metal catalysts with nanometer size and loose structure show good catalytic activity. With further research, the proportion of transition metals in DBFC anode catalysts is increasing, indicating a broader research space and application prospect.
JOURNAL OF NANOPARTICLE RESEARCH
(2023)
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)