Article
Chemistry, Physical
Yingchen Xie, Shan Wang, Ruihe Li, Dongsheng Ren, Mengchao Yi, Chengshan Xu, Xuebing Han, Languang Lu, Benedikt Friess, Gregory Offer, Minggao Ouyang
Summary: In this study, the researchers comprehensively investigated the inhomogeneous degradation in large-format pouch cells using a series of techniques. They identified issues such as lithium plating and proposed an effective indicator for detecting inhomogeneity in the battery.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Qingdi Ke, Shouzhi Jiang, Wanpeng Li, Wu Lin, Xinyu Li, Haihong Huang
Summary: In this study, ultrasound was used as a real-time measuring method for the state-of-charge (SoC) of lithium-ion battery. The ultrasonic time-of-flight (ToF) and amplitude were found to be sensitive to changes in physical properties of cell's layers. The analysis of ultrasonic signals provided information about the battery's temperature, charging/discharging current and voltage, as well as the changing in layered materials. The ultrasonic amplitude measurement showed potential application as a real-time diagnostic technique for lithium-ion battery.
JOURNAL OF POWER SOURCES
(2022)
Article
Energy & Fuels
Russell Broad, Ashley Fly
Summary: This study uses a numerical battery model to examine the influence of different production processes on the performance of lithium-ion battery cells. The results show that electrode cutting tolerance has the largest impact on cell performance characteristics, while calendering tolerance predominantly affects the voltage relaxation period. Furthermore, the study finds that electrode slitting, cutting, and negative electrode coating tolerances require tighter manufacturing tolerance than calendering and positive electrode coating thickness.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Chun Chang, XiaPing Zhou, Jiuchun Jiang, Yang Gao, Yan Jiang, Tiezhou Wu
Summary: This paper proposes a MSC fault diagnosis method based on the evolution of the battery charging voltage ranking, which can accurately identify faulty cells even without voltage anomalies or inconsistencies.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Leonard Jahn, Felix Katzer, Michael A. Danzer
Summary: The study uncovers the impact of lithium deposition on cell voltage and thickness, demonstrating that dilation behavior and voltage analysis can be used to detect LD, proposing a Bayes algorithm for combined data detection.
JOURNAL OF POWER SOURCES
(2022)
Article
Energy & Fuels
Zhenfeng Lin, Dongmei Wu, Changqing Du, Zhong Ren
Summary: This paper proposes a fast and accurate improved potentiometric method for measuring the entropy coefficient of lithium-ion batteries, which maintains comparable accuracy to conventional potentiometric method and has certain advantages in measurement efficiency when compared with other new methods.
Article
Automation & Control Systems
Jinhui Zhou, Wenjing Shen, Zhengwei Ma, Xiaolin Mou, Yu Zhou, Han-Xiong Li, Liqun Chen
Summary: This article proposes a Chebyshev-Galerkin-based thermal fault detection and localization framework for the pouch-type Li-ion battery under limited sensing. The method utilizes Chebyshev functions to construct spatial basis functions and derives time coefficients through the Galerkin method. The proposed method demonstrates effectiveness in fault detection and localization through simulations and experiments.
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
(2023)
Article
Chemistry, Analytical
Jik Soo Kim, Seonghyeon Lim, Rahul S. Ingole, Hirokazu Munakata, Sung -Soo Kim, Kiyoshi Kanamura
Summary: Surface coating is a key approach to improve the high-rate performance and stability of lithium-ion batteries (LIBs). In this study, Al-Ti oxide coated LiCoO2 (LCO) materials were synthesized and their electrochemical properties were compared to pristine LCO. The results showed that the Al-Ti@ LCO had higher discharge capacity, more stable cycling ability, and increased high voltage rate capability. The Al-Ti oxide coating also reduced charge transfer resistance and minimized degradation of the active material during long cycling. The findings indicate that the Al-Ti oxide coating contributes to the enhancement of electrochemical performance without hindering lithium-ion diffusion.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Shasha Qu, Wenbin Wu, Yunfan Wu, Yanping Zhuang, Jie Lin, Laisen Wang, Qiulong Wei, Qingshui Xie, Dong-Liang Peng
Summary: In this study, LiF thin film was sputtered on LCO electrodes to enhance electrochemical performance and reduce voltage polarization. The various polarization components were quantified, and the improved properties of LiF-coated LCO were confirmed through electrochemical tests and in-situ XRD experiments. This work provides a reference for quantifying polarization components and suggests the potential use of LiF film coating in developing similar cathode materials.
Article
Energy & Fuels
Gerrit Karl Mertin, Dominik Wycisk, Marc Oldenburger, Gerry Stoye, Alexander Fill, Kai Peter Birke, Andreas Dirk Wieck
Summary: The entropy coefficient plays a crucial role in describing the thermodynamic behavior of battery cells and modeling the temperature effects on open-circuit voltage. Estimating the entropy through potentiometric measurements is time-consuming. To address this, various methods have been developed to quickly estimate the entropy coefficient. This paper proposes a new method that is comparatively simple in its execution and evaluation. The method utilizes the relationship between dynamic temperature changes and voltage variations in order to estimate the entropy coefficient, significantly reducing the measurement time by a factor of 13 compared to the potentiometric method under the specified conditions.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Physical
Felix Katzer, Michael A. Danzer
Summary: The article introduces an in-situ detection method for detecting lithium deposition, which analyzes battery behavior for LD detection and adjusts charging rate based on detection results. Multiple methods are employed to detect LD, including coulombic efficiency, dilation method, differential voltage analysis, and impedance relaxation method. Characteristic frequencies are identified using impedance spectroscopy for mechanistic interpretation of the phenomena.
JOURNAL OF POWER SOURCES
(2021)
Article
Electrochemistry
Daniel Rutz, Felix Brauchle, Philipp Stehle, Ingolf Bauer, Timo Jacob
Summary: Reference electrodes (REs) are important for accurate assessment and control of battery potentials, but their reliability is overestimated. Researchers have identified the error source in the RE design that blocks the lithium-ion path between anode and cathode. This study introduces an experimental method to accurately quantify the error in-operando of a RE.
Article
Energy & Fuels
Yusheng Zeng, Jinhao Meng, Jichang Peng, Fei Feng, Fangfang Yang
Summary: This paper proposes a fault detection method that considers the uncertainties of multi-source sensor data. It uses density-based clustering and a state machine to isolate faults, and develops a data-driven health estimation model based on multi-source sensors. The experimental results demonstrate its high accuracy and robustness.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Yang Chen, Shujian Liu, Shaokai Cheng, Shuyu Gao, Jingchao Chai, Qiuyue Jiang, Zhihong Liu, Xueqing Liu, Jiyan Liu, Ming Xie, Wubin Dai
Summary: Polyacrylonitrile (PAN) binder shows excellent performance in high-voltage LiCoO2 (HV-LCO) electrode, with high cycling stability and rate capability, and high tolerance to moisture. Furthermore, PAN binder suppresses the decomposition of liquid electrolyte by forming uniform coating on the surface of LiCoO2 and acting as an artificial cathode-electrolyte interphase layer.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Energy & Fuels
X. Dorronsoro, E. Garayalde, U. Iraola, M. Aizpurua
Summary: Traditional battery energy storage systems have limitations in terms of cell imbalances, but modular design can help to improve the cycle life and management. This research identifies module redundancy, cell capacity, and module voltage as the most important design characteristics through factor importance analysis.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Engineering, Electrical & Electronic
Jia-Qi Zhu, Yong-Ling Ban, Rui-Min Xu, Chunting Chris Mi
Summary: A new NFC-connected coupler using IPT-CPT combined wireless charging is proposed for metal-cover smartphone applications, allowing wireless power transfer through a metal cover while saving space and cost.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Shuofeng Zhao, Mohammad Reza Amini, Jing Sun, Chunting Mi
Summary: This paper focuses on the battery thermal management system in electric vehicles and proposes a two-layer predictive control strategy to optimize energy consumption while maintaining battery safety and passenger comfort. The study demonstrates accurate temperature tracking and up to 10.47% energy savings in HVAC compared to baseline control strategies. The proposed framework also shows real-world implementation capability on a real-time vehicle emulator.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2021)
Editorial Material
Engineering, Electrical & Electronic
Mehrdad Ehsani, Chunting Chris Mi
PROCEEDINGS OF THE IEEE
(2021)
Article
Engineering, Electrical & Electronic
Siqi Li, Sizhao Lu, Chunting Chris Mi
Summary: This article introduces the latest electric vehicle charging technologies utilizing wide bandgap devices, focusing on the applications of WBG devices in improving efficiency and power density, reducing costs, and introducing a performance evaluation index for wireless chargers.
PROCEEDINGS OF THE IEEE
(2021)
Article
Thermodynamics
Jufeng Yang, Yingfeng Cai, Chris Mi
Summary: Accurate estimation of battery capacity based on battery surface temperature change is proposed in this paper. Analysis of smoothed differential thermal voltammetry curves and temperature variation transformation are used to reflect battery actual capacity and reduce initial inconsistency impact, showing superior performance compared with existing methods.
Article
Engineering, Multidisciplinary
Jianghua Lu, Guorong Zhu, Chunting Chris Mi
Summary: The successful commercialization of wireless power transfer technology requires a safe, reliable, and efficient charging infrastructure. However, metal objects and living organisms in close proximity to the charging system can pose safety hazards and affect system performance. This article provides a review of available designs for detecting metal and living objects in wireless power transfer systems, including their limitations and potential applications. It also suggests research topics to promote the development and commercialization of wireless charging systems.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2022)
Editorial Material
Engineering, Multidisciplinary
Yijie Wang, Chunting Chris Mi
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Jing Lian, Xiaohui Qu, Xi Chen, Chunting Chris Mi
Summary: This article systematically analyzes the characteristics of a double-sided LCLC-compensated CPT converter and proposes a parameter design method to achieve load-independent constant current output and predesigned voltage limitations. This method can effectively mitigate breakdown and electromagnetic interference issues.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Ting Chen, Chenwen Cheng, Hong Cheng, Cong Wang, Chunting Chris Mi
Summary: This article proposes a power relay system for wirelessly powering multiple loads, and presents a mathematical model and compensation circuits to achieve efficient and interference-free power transfer.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Jufeng Yang, Yingfeng Cai, Chunting Chris Mi
Summary: In this study, a method based on the decoupled characteristic of the charging current is proposed to calculate the SoH of batteries. The method involves parameter identification of an equivalent circuit model and the use of a time constant feature to reflect the battery capacity degradation. Experimental results show that the proposed method has a reduced computational cost and provides satisfactory fitting performance.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2022)
Article
Engineering, Electrical & Electronic
Ting Chen, Chenwen Cheng, Hong Cheng, Cong Wang, Chunting Chris Mi
Summary: This article introduces a novel capacitive power transfer system with multiple constant voltage outputs. By designing capacitive repeater units and utilizing split-inductor matching networks, the system enables independent operation of multiple loads, and enhances electric coupling with aluminum oxide ceramics and L-LCL networks.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Energy & Fuels
Zeyu Cheng, Zhi Cao, John T. T. Hwang, Chris Mi
Summary: This paper proposes a novel multi-phase single-turn permanent magnet synchronous motor (MSPMSM) to meet the stringent requirements of electric aircraft. The MSPMSM features a unique single-turn winding configuration, which reduces coil overhang, increases power density and torque, and reduces motor weight.
Article
Thermodynamics
Jufeng Yang, Xin Li, Xiaodong Sun, Yingfeng Cai, Chris Mi
Summary: This paper proposes a quick and robust battery capacity estimation method using a two-layer constant-voltage charging time-based model. Through studying the evolution of the model under different cut-off currents and utilizing a Ts-adaptive moving average filter, the proposed method can accurately determine the battery's state of health in real-world applications.
Article
Engineering, Electrical & Electronic
Hin Sang Lam, Huawei Yuan, Siew-Chong Tan, Chunting Chris Mi, Josep Pou, S. Y. R. Hui
Summary: This study introduces a bidirectional ac-dc power converter system using modular multilevel converters and dual active bridges, aimed at linking ac distribution voltage and dc grid for future EV charging infrastructure, with novel methods for powering EV charging in multistorey carparks and front-end control for system stability.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Wen-Chin Liu, Ching-Hsiang Cheng, Patrick P. Mercier, Chunting Chris Mi
Summary: This article presents a frequency-domain analysis for modeling the behavior of Constant-on-Time (COT)-controlled buck converters in wide-input-output-range scenarios. A design strategy is proposed to enable robust control with a duty-cycle-independent quality factor, and a constant Q-value circuit is constructed to experimentally verify the system stability and optimal load transient response. The design strategy is also extended to other COT buck control schemes with simulation and calculation verifications.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(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)
