Article
Chemistry, Physical
Munsoo Song, Danwon Lee, Juwon Kim, Yumin Heo, Chihyun Nam, Donghyuk Ko, Jongwoo Lim
Summary: By modifying electrolyte concentration, the correlation between the amount of CO2 evolution and the population of free ethylene carbonate (EC) was investigated. It was found that CO2 evolution and anodic dehydrogenation were higher in an environment enriched with free EC. 1H nuclear magnetic resonance spectroscopy confirmed the formation of vinylene carbonate. Thus, it was concluded that free EC near the surface of the electrode facilitates the chemical decomposition of Li2CO3.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Yixuan Guo, Jun Cheng, Zhen Zeng, Yuanyuan Li, Hongqiang Zhang, Deping Li, Lijie Ci
Summary: The role of the Li2CO3 layer in composite solid electrolytes (CSEs) is elucidated, showing that it inhibits the formation of high conductive interlayers, alters the Li+ transport pathway, and reduces the carrier concentration. In the absence of Li2CO3, the electrolyte exhibits improved ionic conductivity and Li+ transference number, along with excellent cycling performance.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Electrochemistry
Jason K. Ostanek, Mohammad Parhizi, Weisi Li, Gozdem Kilaz, K. R. Crompton
Summary: A high-resolution, 3D, computational fluid dynamics (CFD) model was developed and implemented to simulate the heat and gas generation during thermal runaway failure of an 18650 Li-ion battery cell. The model accounted for gas generation within the cell and its flow through various regions. The simulation captured the key features of the oven test and provided new insights into the physics of venting during thermal runaway.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Energy & Fuels
Ting Cai, Puneet Valecha, Vivian Tran, Brian Engle, Anna Stefanopoulou, Jason Siegel
Summary: This study addresses the critical safety issue of Li-ion battery thermal runaway in Electric Vehicles and proposes a 5-minute advanced warning requirement prior to thermal runaway. By evaluating gas venting and selecting CO2 as the target gas species, along with using the NDIR CO2 sensor, sensitive detection of thermal runaway can be achieved.
Article
Biochemistry & Molecular Biology
Woon Ih Choi, Insun Park, Jae Sik An, Dong Young Kim, Meiten Koh, Inkook Jang, Dae Sin Kim, Yoon-Sok Kang, Youngseon Shim
Summary: The focus of mainstream lithium-ion battery research is on increasing capacity and performance, but it is also important to invest in improving battery safety. This study investigates the potential usage of an electrolyte additive, divinyl sulfone (DVSF), to reduce gas generation in battery cells. By examining different DVSF concentrations, the researchers found that 1% DVSF could significantly reduce gas generation without impacting the cycle life of the battery cells. Molecular dynamics simulations were conducted to understand the underlying reaction pathways and mechanisms. The study concludes that DVSF additives offer a simple and effective approach to control gas generation in lithium-ion batteries.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Multidisciplinary
Kangsheng Huang, Sheng Bi, Hai Xu, Langyuan Wu, Chang Fang, Xiaogang Zhang
Summary: Gel polymer electrolytes (GPEs) are used as alternatives to liquid electrolytes in lithium-metal batteries (LMBs). Adding diluent 1,1,2,2-tetrafluoroethyl 2,2,3,3-tetrafluoropropyl ether (TTE) to regulate the electrolyte structure improves the electrochemical stability and ion transport properties of GPEs. The addition of TTE enhances ion association and forms a robust and low-impedance solid electrolyte interface (SEI) on the anode surface. This study provides an effective approach for controlling solvation structures in GPEs, which can advance the design of GPE-based LMBs in the future.
Article
Nanoscience & Nanotechnology
Shinji Kondou, Yusuke Sakashita, Xiaoxiao Yang, Kei Hashimoto, Kaoru Dokko, Masayoshi Watanabe, Kazuhide Ueno
Summary: The study found that poly(LiSTFSA) exhibited the highest ionic conductivity in the lowest polar mixture at the highest salt concentration, attributed to a unique conduction phenomenon. This provides insights into a new design strategy for nonaqueous liquid electrolytes for LIBs.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Polymer Science
Sandugash Kalybekkyzy, Al-Farabi Kopzhassar, Memet Vezir Kahraman, Almagul Mentbayeva, Zhumabay Bakenov
Summary: A series of UV-photocrosslinked flexible solid polymer electrolytes with excellent flexibility and mechanical properties were successfully prepared as alternative electrolytes for lithium-ion batteries. These electrolytes exhibit high ionic conductivity and stable compatibility, making them suitable for application in high-voltage lithium-ion batteries.
Article
Materials Science, Multidisciplinary
Gang Wen, Liang Tan, Xuexia Lan, Hanyin Zhang, Renzong Hu, Bin Yuan, Jun Liu, Min Zhu
Summary: Modifying the solid electrolyte interface (SEI) with materials like Li2CO3 can enhance the interfacial stability and lithium storage reversibility of SnO2, resulting in composite anodes with high Coulombic efficiencies, large capacities, and long cycle lives. This strategy can also greatly promote the cycling stability of other alloying-type and conversion reaction anodes, offering a universal and simple approach for achieving highly reversible and stable electrodes for large-capacity lithium storage.
SCIENCE CHINA-MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Jan L. Allen, Bria A. Crear, Rishav Choudhury, Michael J. Wang, Dat T. Tran, Lin Ma, Philip M. Piccoli, Jeff Sakamoto, Jeff Wolfenstine
Summary: Through the preparation of Li+ stuffed spinel-structured materials, this study demonstrates their capability to achieve fast Li+ ion conduction and their potential for enabling a single-phase fully solid electrode without interphase impedance.
Article
Thermodynamics
Kaiyu Zou, Kun He, Shouxiang Lu
Summary: This study investigates the venting process of lithium-ion batteries during thermal runaway, including composition and rate. The results show that with the increase of SOC, the gas production composition becomes more complex and the gas concentration increases significantly. The study reveals the gas production mechanism of thermal runaway batteries.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Review
Chemistry, Multidisciplinary
Mario Valvo, Christina Floraki, Elie Paillard, Kristina Edstrom, Dimitra Vernardou
Summary: The demand for large-scale and sustainable energy storage systems is increasing, leading to the emergence of potassium-ion batteries as a potential alternative to lithium-ion batteries. However, the development of anode materials for potassium-ion batteries still faces challenges. Iron oxides are promising anode materials due to their high theoretical capacity, low cost, and abundant reserves, but they also have limitations.
Article
Energy & Fuels
Gongquan Wang, Depeng Kong, Ping Ping, Xiaoqin He, Hongpeng Lv, Hengle Zhao, Wanru Hong
Summary: Thermal runaway poses a serious risk to lithium-ion batteries due to the emission of flammable gases, potentially leading to explosions. A model incorporating venting is proposed to reduce explosion risk and determine the optimal battery pack configuration. Increasing ventilation rate decreases gas concentration and explosion duration, while the effect of void volume is limited. Increasing cell distance inhibits gas dispersion, prolonging the explosion risk. This model contributes to the optimization of battery pack safety.
Article
Materials Science, Multidisciplinary
Aditya Choudhary, Dengpan Dong, Dmitry Bedrov
Summary: This study investigated the relationship between polymer structure and lithium ion transport mechanism through molecular dynamics simulations, and proposed design principles for improving conductivity.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Salvatore Luiso, James J. Henry, Behnam Pourdeyhimi, Peter S. Fedkiw
Summary: Nonwoven PVDF materials exhibit high porosity, mechanical stability, and electrolyte absorption, making them suitable for lithium-ion battery separators. Research shows that PVDF separators produced through meltblowing process have high homogeneity and surface area, with high electrolyte uptake.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Shaojun Huang, Yuming Zhao, Konstantin Filonenko, Yun Wang, Tianlong Xiong, Christian T. Veje
Summary: This paper proposes a new flexibility management method that incentivizes flexibility service providers to actively participate in congestion management of distribution grids through three types of flexible block offers. Compared to existing literature, the proposed method is more efficient in terms of computation burden and its efficacy is demonstrated through case studies on a modified Roy Billinton Test System.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2021)
Article
Thermodynamics
V Ljungdahl, M. Jradi, C. Veje
Summary: The demand for data centers and high-performance computing systems is increasing due to the growing usage of cloud services, social media, and the internet. The adoption of liquid cooling and waste heat recovery technologies can improve system efficiency, reduce energy consumption, and contribute to sustainable development.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
V Ljungdahl, K. Taha, J. Dallaire, E. Kieseritzky, F. Pawelz, M. Jradi, C. Veje
Summary: This study investigates the theoretical and experimental aspects of a Phase Change Material (PCM)-based ventilation system module, developing a numerical model to predict the system's dynamic performance. The optimal PCM melting temperature is found to significantly increase cooling capacity compared to the reference temperature. The study highlights the importance of PCM mass and melting temperature in optimizing the efficiency and performance of the PCM-driven ventilation system.
Article
Electrochemistry
Paul T. Coman, Eric C. Darcy, Brad Strangways, Ralph E. White
Summary: A fast novel reduced lumped model (RLM) was proposed for calculating the temperature increase in cylindrical Li-ion cells during high-current discharge, by reducing PDE to ODE and solving them analytically. The model showed good potential for calculating temperature distribution in battery packs operating at high C-rates.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Electrochemistry
Paul T. Coman, Eric C. Darcy, Ralph E. White
Summary: This paper presents a simplified thermal runaway model (FEM) used to guide the design of a novel battery pack that can resist thermal runaway propagation passively. The model is based on the heat equation and the maximum amount of energy measured using a custom-made calorimeter. It was validated against experimental data and used to validate some experimental observations, showing its accuracy and practicality.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Construction & Building Technology
Jakob Bjornskov, Muhyiddine Jradi, Christian Veje
Summary: The building sector in the EU accounts for 40% of total energy consumption and inefficient operation and delayed detection of faulty systems lead to high energy consumption and CO2 emissions. Building energy performance monitoring and evaluation are crucial for proper building operation and timely detection of anomalies and faults.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Energy & Fuels
Lasse Kappel Mortensen, Hamid Reza Shaker, Christian T. Veje
Summary: This paper explores the use of geospatial data processing and machine learning to predict the fault vulnerability in energy distribution networks, and the results show that it effectively identifies failure-prone pipes and cables. Additionally, a new data level imbalanced learning technique is proposed to handle the scarcity of fault observations.
Article
Construction & Building Technology
Jonathan Dallaire, Hafiz Muhammad Adeel Hassan, Jesper Holm Bjernemose, Mads Peter Rudolph Hansen, Ivar Lund, Christian T. Veje
Summary: This paper presents experimental investigations of a dual-stack latent thermal energy storage system for cooling applications in buildings. The results show that the pressure distribution is relatively uniform within the inlet and outlet pressure chambers. The design using two PCM stacks achieved high heat storage effectiveness.
BUILDING AND ENVIRONMENT
(2022)
Article
Energy & Fuels
David Petrushenko, Ziba Rahmati, Darun Barazanchy, Wout De Backer, William E. Mustain, Ralph E. White, Paul Ziehl, Paul T. Coman
Summary: This study presents a dip-coating method to apply active material to carbon fibers. The performance of carbon fiber electrodes as anodes and cathodes was analyzed using electrochemical techniques. The dip-coated carbon fibers showed a measured capacity of 92 A h kg(-1) as anodes and 52.3 A h kg(-1) as cathodes. A full-cell with carbon fiber electrodes achieved a capacity of 24.7 A h kg(-1) after 30 cycles. The use of scanning electron microscopy provided insights into the surface topologies and the quality of the dip-coated active material.
Article
Construction & Building Technology
Hafiz Muhammad Adeel Hassan, Mads Peter Rudolph Hansen, Jonathan Dallaire, Martin Anker Boesen Larsen, Esther Kieseritzky, Joe Alexandersen, Christian Veje, Ivar Lund
Summary: Experimental investigations were conducted on a PCM-based thermal energy storage system. The results showed that the 1.5 mm gap configuration had faster heating and cooling rates and higher energy storage potential compared to the 3 mm configuration.
ENERGY AND BUILDINGS
(2023)
Proceedings Paper
Energy & Fuels
Shaojun Huang, Konstantin Filonenko, Yuming Zhao, Tao Yang, Tianlong Xiong, Christian Veje
Summary: This paper proposes an optimal energy planning method to minimize the cost of heating, ventilation, and air conditioning (HVAC) of a building. It establishes a RC state space model to describe the thermal and CO2 dynamics of a building, and uses linear programming to minimize the costs. Case studies demonstrate the efficacy of the proposed method.
2021 IEEE POWER & ENERGY SOCIETY GENERAL MEETING (PESGM)
(2021)
Proceedings Paper
Construction & Building Technology
Muhyiddine Jradi, Na Liu, Aslak Johansen, Krzysztof Arendt, Claudio Giovanni Mattera, Mikkel Baun Kjaergaard, Christian Veje, Bo Norregaard Jorgensen
PROCEEDINGS OF BUILDING SIMULATION 2019: 16TH CONFERENCE OF IBPSA
(2020)
Proceedings Paper
Construction & Building Technology
Krzysztof Arendt, Anders Clausen, Claudio G. Mattera, Muhyiddine Jradi, Aslak Johansen, Christian T. Veje, Mikkel B. Kjaegaard, Bo N. Jorgensen
PROCEEDINGS OF BUILDING SIMULATION 2019: 16TH CONFERENCE OF IBPSA
(2020)
Proceedings Paper
Construction & Building Technology
Krzysztof Arendt, Christian T. Veje
PROCEEDINGS OF BUILDING SIMULATION 2019: 16TH CONFERENCE OF IBPSA
(2020)
Proceedings Paper
Construction & Building Technology
Konstantin Filonenko, Krzysztof Arendt, Muhyiddine Jradi, Soren Andersen, Christian Veje
PROCEEDINGS OF BUILDING SIMULATION 2019: 16TH CONFERENCE OF IBPSA
(2020)
