Article
Chemistry, Physical
Shaonan Liu, Song Lu, Yangyang Fu, Weitong Ma, Heping Zhang
Summary: In this study, the heat flow behavior of (Ni1/3Co1/3Mn1/3)O-2 (NCM) and LiFePO4 (LFP) batteries during discharge and charge cycles at different ambient temperatures and discharge rates was investigated using a high precision isothermal microcalorimeter (TAM IV) for the first time. The results showed that low temperatures had a greater effect on the heat flow of the batteries. Furthermore, NCM batteries exhibited higher thermal stability during heating and cooling, as well as with increasing discharge rates. The research provides practical insights for the application, monitoring, and optimization of lithium-ion batteries.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Multidisciplinary
Min Ku Jeon, Sung-Wook Kim, Maengkyo Oh, Hee-Chul Eun, Keunkyoung Lee
Summary: The chlorination behavior of Li(Ni1/3Co1/3Mn1/3)O-2 (NCM) was studied, and it was found that chlorination leads to a structural transition and the removal of lithium. The chlorination reaction begins at 500 degrees C and is accelerated by an increase in temperature. A temperature of 550 degrees C was proposed as the optimum temperature for the chlorination of NCM.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Sangjun Kim, Sanghyuk Park, Minsang Jo, Mincheol Beak, Jangho Park, Goojin Jeong, Ji-Sang Yu, Kyungjung Kwon
Summary: The study synthesized cathode active materials with varying Al content and examined the effects on physicochemical, thermal, and electrochemical properties. Results showed that increased Al content in the materials led to irregular particle shape and distribution, reduced initial charge/discharge capacity and cyclability, but improved rate capability. Residual Al was found to adversely affect capacity and cyclability, suggesting that trace amounts of Al in the materials can be tolerated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Blake G. Hudson, Sara E. Mason
Summary: In this study, the effect of lithium content on metal release trends in Li-x(Ni1/3Mn1/3Co1/3)O-2 (NMC) was investigated computationally and a machine learning model was developed to predict voltage values.
APPLIED SCIENCES-BASEL
(2022)
Article
Thermodynamics
Xiaolong Yang, Xiaolin Gao, Futao Zhang, Wei Luo, Yongkang Duan
Summary: This study developed a method of embedding thermocouples inside a lithium-ion battery to study the temperature inconsistency between the battery interior and the surface. Experimental results showed that under different charging and discharging rates and temperature conditions, there were differences in temperature distribution between the battery interior and surface, and the current rates also had an effect on the maximum temperature and temperature difference.
APPLIED THERMAL ENGINEERING
(2021)
Article
Chemistry, Physical
Jimin Lee, Sanghyuk Park, Mincheol Beak, Sang Ryul Park, Ah Reum Lee, Suk Hyun Byun, Junho Song, Jeong Soo Sohn, Kyungjung Kwon
Summary: The presence of sulfate on the surface of NCMS affects its surface structure and performance, leading to a slight decrease in discharge capacity compared to pristine NCM.
Article
Thermodynamics
Zonghou Huang, Ting Shen, Kaiqiang Jin, Jinhua Sun, Qingsong Wang
Summary: The study found that heating power has a more significant impact on the thermal runaway behavior of batteries under overheating conditions, with the peak heat release rate increasing with heating power. The severity of thermal runaway deteriorates rapidly with increasing heating power, and thermal runaway induced by higher heating power requires less input thermal energy.
Article
Thermodynamics
Hao Li, Lijun Fu, Xinlin Long, Lang Liu, Ziqing Zeng
Summary: The overcharge behavior of high-power lithium-ion batteries with Li(Ni1/3Mn1/3Co1/3)O-2 as the cathode at different current rates is studied in this work. It is found that overcharge at current rates below 3 C does not lead to uncontrollable combustion and explosion. The peak voltage of the battery increases and the power it can receive before the battery ruptures decreases as the charge current rates increase. In addition, the internal heat production is mainly contributed by side reactions.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Chemistry, Physical
Blake G. Hudson, Diamond T. Jones, Victoria M. Rivera Bustillo, Joseph W. Bennett, Sara E. Mason
Summary: The study used density functional theory (DFT) + solvent ion methodology to investigate the energetics of stepwise release of two surface metals, exploring different combinations of metal removal and unique patterns of defects formed on the NMC surface. The research found that a second metal removal preferably occurs at a metal lattice site adjacent to the initial defect, maintaining the most antiferromagnetic couplings between the remaining Ni/Mn.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Seongdeock Jeong, Sanghyuk Park, Mincheol Beak, Jangho Park, Jeong-Soo Sohn, Kyungjung Kwon
Summary: In this study, it was found that trace amounts of iron and aluminum from spent lithium-ion batteries can be utilized as doping elements to enhance the electrochemical performance of resynthesized cathode active materials, without affecting the morphology and layered structure of the materials.
Article
Electrochemistry
Zesen Wei, Huiqi Cao, Chen Liang, Zhaoyu Wang, Lei Feng, Qingsong Wang, Jinhua Sun
Summary: This study utilized thermogravimetric analysis, Fourier transform infrared spectroscopy analysis, and mass spectrometry to investigate the kinetic characteristics and thermal stabilities of Li(Ni1/3Co1/3Mn1/3)O-2 (NCM111) cathodes under different states of charge. The research found that the amount of oxygen generation is proportional to the state of charge, and the higher the state of charge, the lower the activation energy. Additionally, X-ray diffraction tests revealed that the structural stability of the cathode weakened with an increase in state of charge, and micro-calorimeter tests showed a decrease in thermal stability with an increase in state of charge.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Hyun-Ju Jang, Seong-Hee Lee, Eui-Jeong Park, Hae-In Kim, Jong-Tae Son
Summary: A novel T-LNCM cathode material was synthesized using a MnO2 nanorod template to increase surface area, resulting in an ultra-high capacity of 220.2 mAhg(-1) at 0.1 C. This capacity is significantly higher than that of conventional LNCM cathode material.
Article
Chemistry, Inorganic & Nuclear
Jordi Jacas Biendicho, Avireddy Hemesh, Victor Izquierdo, Cristina Flox, Joan Ramon Morante
Summary: In this study, Vulcan carbon was used as a conductive additive to formulate NCM-based slurries for SSFB catholyte, enabling the characterization of electrical and electrochemical performances. The results were correlated with post-mortem analyses to identify factors limiting the performance of the semi-solid slurry, such as contact resistance stability and cation mixing. Improved cycling stability and detection of antisite defect formation were achieved, providing valuable insights for future research in SSFB technology.
DALTON TRANSACTIONS
(2021)
Article
Electrochemistry
Tetsuo Nagami, Toyokazu Nomoto, Harue Sugiyama, Shoji Tachiki, Ren Sakamoto, Toshiaki Ohta
Summary: This study investigated the capacity deterioration mechanism and morphological changes of NCM cathode material under different testing conditions. The results showed that crack generation, formation of cubic spinel phase on the surface, and deposition of decomposed species were the main factors contributing to capacity deterioration.
Article
Chemistry, Analytical
Yusuke Abe, Kensuke Sawa, Masahiro Tomioka, Ryoei Watanabe, Tatsuya Yodose, Seiji Kumagai
Summary: We present a methodology for extracting cathode active materials from waste lithium-ion batteries (LIBs) in a time-effective, automatic, and safe manner. The recovered materials can be used for the fabrication of new LIBs. The feasibility of the method was tested for the recovery of ternary Li transition metal oxide (LTMO) cathode materials from waste automotive LIBs. The recovered materials showed promising electrochemical performance, with high capacity retention after multiple charge-discharge cycles.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Engineering, Environmental
Dahee Jin, Youngjoon Roh, Taejin Jo, Dong Ok Shin, Juhye Song, Ju Young Kim, Young-Gi Lee, Hongkyung Lee, Myung-Hyun Ryou, Yong Min Lee
Summary: The study investigates how coating thin carbon layers on current collectors in lithium metal electrodes can maintain interfacial contact between the copper foil and lithium metal particles, while also reducing overpotential to improve battery performance.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Electrochemistry
Williams Agyei Appiah, Cyril Bubu Dzakpasu, Hyejin Lee, Hochun Lee, Yong Min Lee
Summary: The research demonstrates the impact of LiClO4 salt concentrations in propylene carbonate on the switching speed and coloration efficiency of RF sputtered tungsten oxide film. The model developed for simulation is based on dilute solution theory and includes variable physical properties. The findings provide insight into designing electrochromic devices with excellent switching speed and coloration efficiency.
ELECTROCHIMICA ACTA
(2021)
Article
Engineering, Chemical
Muchakayala Ravi, Sanghoon Kim, Fen Ran, Dong Soo Kim, Yong Min Lee, Myung-Hyun Ryou
Summary: Polymer electrolytes based on PVdF-HFP, LiTFSI, and PMPyrrTFSI were prepared and their composition dependence and electrical properties were studied to develop the optimum composition. The optimized gel polymer electrolytes exhibited high mechanical stability and excellent thermal stability up to 420 degrees C, showing potential for application in solid-state lithium secondary batteries. A solid-state cell based on 70PVdF-HFP/30LiTFSI/60PMPyrrTFSI delivered a maximum discharge capacity of 151 mAh g(-1) at room temperature with good rate capability and cycling performance.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Physical
Dahee Jin, Youngjoon Roh, Taejin Jo, Myung-Hyun Ryou, Hongkyung Lee, Yong Min Lee
Summary: A composite electrode with preplanted LiNO3 on Li metal powder (LN-LMP) was designed to stabilize the LMP surface and enhance the performance of Li metal batteries (LMBs). The LN-LMP electrode showed excellent cycling performance and outperformed cells with LiNO3-containing electrolytes.
ADVANCED ENERGY MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Isheunesu Phiri, Jungmin Kim, Dong-Hoon Oh, Muchakayala Ravi, Hyeon-Su Bae, Jinseok Hong, Sojin Kim, Yong-Cheol Jeong, Yong Min Lee, Young-Gi Lee, Myung-Hyun Ryou
Summary: Utilizing a dual-salt electrolyte containing 0.05 M LiNO3 can significantly enhance the electrochemical performance of Li metal anodes in secondary batteries. The presence of LiNO3 promotes the formation of a stable solid electrolyte interface, facilitating uniform lithium deposition during cycling processes.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Hyeon-Su Bae, Isheunesu Phiri, Hong Suk Kang, Yong Min Lee, Myung-Hyun Ryou
Summary: The study found that lithium metal fabricated with large and flexible patterning stamps demonstrated improved electrochemical performance and stable morphological properties, showing a significant increase in patterned area compared to traditional stainless-steel stamps.
JOURNAL OF POWER SOURCES
(2021)
Review
Chemistry, Multidisciplinary
Diddo Diddens, Williams Agyei Appiah, Youssef Mabrouk, Andreas Heuer, Tejs Vegge, Arghya Bhowmik
Summary: The solid electrolyte interphase (SEI) is a complex passivation layer that forms on battery electrodes to prevent electrolyte degradation while allowing ion conduction. It plays a crucial role in battery performance and aging, but its formation mechanism and properties remain elusive. Recent advances in data-driven models and machine learning techniques offer opportunities to understand and design SEI with desired properties, enabling breakthroughs in battery technology.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Electrochemistry
Jihun Song, Dong Ok Shin, Seoungwoo Byun, Youngjoon Roh, Cheol Bak, Juhye Song, Jaecheol Choi, Hongkyung Lee, Tae-Soon Kwon, Young-Gi Lee, Myung-Hyun Ryou, Yong Min Lee
Summary: This study reevaluates the adhesion values measured by the microblade cutting method on thick composite electrodes, and identifies the significant influence of side areas and actual peeling area on the measured forces. A new measurement standard is proposed for ultra-high electrodes to obtain reliable adhesion.
JOURNAL OF ELECTROCHEMICAL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Yujin So, Hyeon-Su Bae, Yi Young Kang, Ji Yun Chung, No Kyun Park, Jinsoo Kim, Hee-Tae Jung, Jong Chan Won, Myung-Hyun Ryou, Yun Ho Kim
Summary: Silicon-based anodes have limitations due to significant volume changes during lithium-ion battery cycles, but a water-soluble polyimide (W-PI) binder has been developed to address this issue. By forming ester bonds with silicon nanoparticles, the W-PI binder enhances adhesion and improves the electrochemical performance and cyclability of the silicon anode.
Article
Engineering, Environmental
Youngjoon Roh, Dahee Jin, Eunsae Kim, Seoungwoo Byun, Yoon-Sung Lee, Myung-Hyun Ryou, Yong Min Lee
Summary: In this study, a new chemical crosslinking method was designed to minimize the thickness of ceramic coating layer (CCL) while maintaining its thermal stability. The results showed that the crosslinked PD ceramic-coated separator (xPD-CCS) could maintain its dimension even at high temperatures and exhibited comparable cycle performance to conventional separators.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Williams Agyei Appiah, He Li, John Lampkin, Juan Maria Garcia-Lastra
Summary: This study develops a mathematical model to describe the discharge performance and reversibility of Al-S batteries at different current densities. Experimental results show that the discharge mechanisms and Al2S3 precipitation routes of the cells vary with different current densities. The contact resistance is identified as the main factor limiting the discharge performance at high current densities.
JOURNAL OF POWER SOURCES
(2022)
Article
Engineering, Environmental
Williams Agyei Appiah, Anna Stark, Steen Lysgaard, Jonas Busk, Piotr Jankowski, Jin Hyun Chang, Arghya Bhowmik, Bernhard Gollas, Juan Maria Garcia-Lastra
Summary: Aluminum batteries with imidazolium-based electrolytes have the potential to replace lithium-ion batteries. However, the development of reversible aluminum metal anodes is hindered by slow charge-discharge characteristics due to side reactions. In this study, a physics-based model coupled with density functional theory is used to explain the stripping-plating mechanisms on the aluminum anode surface. Sensitivity analysis is performed using machine-learning regression to identify the key parameters. The results show that aluminum deposition is controlled by diffusion and kinetics, limited by high current density. This study highlights the importance of combining models, machine learning, and experiments to understand complex electrochemical systems.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Electrochemistry
Isheunesu Phiri, Jeong-Tae Kim, Ssendagire Kennedy, Muchakayala Ravi, Yong Min Lee, Myung-Hyun Ryou
Summary: A new method of slurry coating, called double-coated electrode, has been developed to improve the uniformity, density, and adhesion strength of electrodes. The double-coated electrode exhibits lower electric resistance and higher electrochemical performance, especially at higher C rates. This method is effective for the large-scale production of high-energy-density electrodes.
JOURNAL OF THE KOREAN ELECTROCHEMICAL SOCIETY
(2022)
Article
Electrochemistry
Williams Agyei Appiah, Youngjoon Roh, Cyril Bubu Dzakpasu, Myung-Hyun Ryou, Yong Min Lee
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2020)
Article
Chemistry, Physical
Dohwan Kim, Hirokazu Munakata, Joonam Park, Youngjoon Roh, Dahee Jin, Myung-Hyun Ryou, Kiyoshi Kanamura, Yong Min Lee
ACS APPLIED ENERGY MATERIALS
(2020)
