Article
Chemistry, Physical
Masahiro Shimizu, Kohei Kimoto, Takuya Kawai, Toshinori Taishi, Susumu Arai
Summary: The research on using P or B doped silicon materials as negative electrode materials can effectively improve their electrical conductivity and mechanical properties, enabling lithium insertion reactions to occur at higher potentials and improving cycling performance.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Yasuhiro Domi, Hiroyuki Usui, Tasuku Hirosawa, Kai Sugimoto, Takuma Nakano, Akihiro Ando, Hiroki Sakaguchi
Summary: This study investigates the charge and discharge properties of Si-based electrodes in ionic liquid electrolytes at low temperatures. It is found that the reversible capacity at low temperature is influenced by the properties of the surface film on the electrodes and/or the ionic conductivity of the electrolytes. Precoating Si-only electrodes with a surface film at room temperature improves the cycle life at low temperatures in ionic liquid electrolytes. Doping phosphorus into Si enhances the cycling performance, especially at lower temperatures.
Article
Nanoscience & Nanotechnology
Yu Fu, Xuyun Guo, Zhenglong Xu, Guangming Zhao, Chao Xu, Ye Zhu, Limin Zhou
Summary: This study investigates the nanostructure-mediated lithiation mechanism in Co3O4 anodes for lithium-ion batteries, revealing two different lithiation pathways and the reasons for capacity loss in different nanostructures.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Ke Xu, Ningbo Liao, Wei Xue, Hongming Zhou
Summary: The study investigates the structural rearrangement of the MoS2/graphene composite during lithiation and delithiation processes, revealing that the lithiated configuration cannot be fully restored to the original structure, leading to irreversible lithium loss in the subsequent lithiation process.
Article
Electrochemistry
Matachan Oupatam, Panupol Untarabut, Kiettipong Banlusan
Summary: Optimizing the oxygen content of silicon oxides used as anode materials for high-performance lithium-ion batteries is critical for improving lithium storage properties. However, the effect of oxygen content on the structural evolution of the materials is still not well understood. This study uses molecular dynamics simulations to investigate the dynamic processes of silicon oxides and highlights the impact of oxygen content on lithium storage properties. The results show that increasing oxygen content can reduce volume expansion during lithiation but leads to trapped lithium and irreversible structural changes.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Review
Chemistry, Multidisciplinary
Shuzhen Li, Hao Zhang, Yong Liu, Li Wang, Xiangming He
Summary: This article provides a comprehensive review of the delithiation/lithiation mechanism of LiMnyFe1-yPO4 (LMFP) by elucidating the changes in crystal structure and electronic structure based on in situ characterization. It addresses the existing research deficiencies and identifies potential directions for future investigations to develop new olivine-type cathode materials with superior electrochemical performance.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Xu Li, Ran Zhang, Shuo Li, Yalei Wang, Lei Cui, Yaxuan Yao, Lingling Ren, Xueshen Wang, Senlin Jin, Yi Zhang, Xingfu Tao
Summary: This study investigates strains, microstructures, and dislocations at crack tips on silicon. Anisotropic strain distributions and strain concentration zones were observed at crack tips on different crystal planes. The generation of dislocations was found to be the main cause of plastic deformation and strain concentration. The presence of strain concentration zones and material resistance inhibited further crack propagation.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
S. Herold, J. Acker
Summary: The study reveals that HNO3, H2O2, and H2SiF6 only oxidize tensile strained silicon areas and not unstrained silicon, while H2O2/HF and HNO3/HF have different etching mechanisms.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Engineering, Multidisciplinary
Yang Jiang, Cunyi Li, Chi Wu, Timon Rabczuk, Jianguang Fang
Summary: Crack-direction-based decomposition is used to control the propagation of cracks in a phase field modelling context. The proposed double-phase field model extends this strategy to complex crack modelling in a 3D setting with plastic deformation. The model accurately captures different crack modes and has been proven effective in solving complex 3D problems.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Engineering, Mechanical
Ritika Singh, Subir Das
Summary: This article investigates the behavior of an arbitrary oriented crack that crosses the interface under thermo-mechanical loading. Mathematical methods are used to derive the expressions of stress intensity factors (SIFs) and strain energy release rates (SERRs) of the crack, and the results are validated. Graphical presentations are provided to better understand the behavior of the crack under different parameters.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Energy & Fuels
Yibo Liu, Xinyu Liu, Yuanlong Zhu, Jiawei Wang, Weiwei Ji, Xizheng Liu
Summary: In this study, Si/graphite composites with high capacity and conductivity were prepared using a simplified chemical dealloying and pitch coating process. The composite showed excellent cyclic stability and high energy density, making it a promising anode material for next-generation LIBs.
Article
Electrochemistry
Aditya Vemulapally, Manoj K. Jangid, Tanmay K. Bhandakkar, Amartya Mukhopadhyay
Summary: Mechanical degradation is a major cause of electrochemical instability in layered/cation-ordered Li-transition metal oxides, with a focus on Ni-containing Li-T-M oxides in deep delithiation states. However, mechanical instability can also be initiated in the initial stages of delithiation, especially during the HI -> HII phase transformation, even in base Li-T-M oxides like LiCoO2. The mathematical model developed in this work predicts internal stress build-up during phase transformation as a likely cause for plastic deformation, showing a strong correlation between phase transformations, transformed phases, and accompanying mechanical stresses during electrochemical delithiation/lithiation of Li-T-M oxides.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Tong Zhou, Xinrun Yu, Fan Li, Jianwei Zhang, Bowen Liu, Longlong Wang, Yuan Yang, Zhiwei Hu, Jun Ma, Chao Li, Guanglei Cui
Summary: Nickel-rich layered transition metal oxide has poor structural stability during cycling as cathode materials for next-generation lithium-based automotive batteries. A bulk oxygen release induced dynamic accumulative electrochemical-mechanical coupling failure mechanism was reported. The stabilization of lattice oxygen in bulk region is a feasible solution to suppress the structural transition and the inhomogeneous stress distribution.
ENERGY STORAGE MATERIALS
(2023)
Article
Nuclear Science & Technology
Ze Liu, Xue Bai, Sen Sun, Yafei Zhang, Mu Lin, Xiaoling Zhu, Liang Zhao, Songke Yu, Fuchun Sun, Lin Tang
Summary: In this study, the relationship between substrate surface roughness and crack behavior in tritium barrier coating system was investigated using XFEM. The results showed that substrate surface roughness affects strain energy release rate and crack propagation patterns, with different crack driving force distributions in peak and valley regions. Additionally, stress along the path of the rough interface can be partially suppressed, and multiple cracks significantly reduce crack growth.
FUSION ENGINEERING AND DESIGN
(2021)
Article
Materials Science, Coatings & Films
Joao P. Martins, Hanyang Yu, Ying Chen, G. Brewster, R. McIntyre, Ping Xiao
Summary: The degree of BC tortuosity influences crack path configuration, critical energy release rate (G(c)), and crack propagation velocity (v(prop)). Higher BC interface tortuosity and more compliant TBC microstructures result in reduced strain energy release rates and crack propagation velocities.
SURFACE & COATINGS TECHNOLOGY
(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)