Article
Chemistry, Physical
Patrick Muenster, Marcel Diehl, Joop Enno Frerichs, Markus Boerner, Michael Ryan Hansen, Martin Winter, Philip Niehoff
Summary: The study demonstrates that applying a 2C C-rate can reduce the formation time of lithium ion batteries, but may also result in the occurrence of lithium plating. However, using different C-rates during formation process does not significantly affect the thermal safety and cycling performance.
JOURNAL OF POWER SOURCES
(2021)
Article
Energy & Fuels
Dinesh Kumar Sharma, Pranjal Agarwal, Aneesh Prabhakar
Summary: The thermal performance of fins in a Phase Change Material-Heat Pipe based hybrid battery thermal management system is evaluated in this study. The optimized design of the hybrid system effectively reduces the battery surface temperature and is validated through experiments.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Gyunhee Lee, Curt M. Wong, Christo S. Sevov
Summary: This study evaluates the performance of ferrocenyl derivatives as shuttles in redox-targeting flow batteries and finds that a dual system outperforms other systems in terms of battery performance. The study also reveals that the rate of redox targeting dictates the system's performance and depth of charge.
ACS ENERGY LETTERS
(2022)
Article
Energy & Fuels
J. G. Qu, Z. Y. Jiang, J. F. Zhang
Summary: This study investigates the degradation of lithium-ion batteries (LIBs) during fast charging, focusing on the effects of operating temperature and current rate. The results reveal that the most significant factor influencing battery capacity fade changes from lithium plating to the growth of the solid-electrolyte interface (SEI) with increasing operating temperatures. High operating temperatures can alleviate capacity fade at higher current rates, while accelerating capacity fade at lower current rates. The study also analyzes the changes in electrode morphology and identifies the main degradation mechanisms as electrode material detachment, electrode particle cracking, SEI growth, lithium plating, and structural changes in layered material crystal. These findings provide insights for the development of fast-charging strategies and battery management system design.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Applied
Jia Guo, Yaqi Li, Jinhao Meng, Kjeld Pedersen, Leonid Gurevich, Daniel-Ioan Stroe
Summary: This study investigates the capacity increase observed in the early stage of Li-ion battery cycling. The results show that the increased capacity mainly originates from the graphite anode, and larger depth of discharge and high temperatures accelerate this capacity increase.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Energy & Fuels
Runjie Yang, Guoqing Yu, Zegang Wu, Tingting Lu, Tao Hu, Fengqin Liu, Hongliang Zhao
Summary: This study examines the performance of aged aluminum oxide ceramic-coated polyethylene separators (PE-Al2O3 separators) used in lithium-ion batteries. The cycling process of the batteries leads to the accumulation of degradation products on the separator surface, resulting in decreased porosity, ionic conductivity, and increased internal resistance. The mechanical properties of the separator deteriorate with higher current rates and the number of cycles. After 200 cycles at 1.5C, the tensile strength of the aged separator decreases by approximately 6.70%. The aging process also causes a decrease in wettability and an increase in the contact angle with the electrolyte.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Nanoscience & Nanotechnology
Shogo Komagata, Yuichi Itou, Hiroki Kondo
Summary: This study investigates the effects of charge/discharge cycling on the thermal stability of a high-Ni cathode material, LiNi0.8Co0.1Mn0.1O2. The results show that the bulk structure of the cathode remains unchanged, while a stable rock-salt structure is formed in the surface layer. The formation of the rock-salt layer significantly reduces the heat generation at the lowest temperature, enhancing the thermal stability of the high-Ni cathode.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Jiyang Li, Jingxin Huang, Xiangbang Kong, Jing Zeng, Jinbao Zhao
Summary: The kinetic degradation of Li+ de-/intercalation is found to be a key factor for the apparent capacity decay of NCM523 under the high upper-limit charging potential. The apparent capacity loss can be restored significantly by reducing the current density or increasing the operating temperature. The formation of the electrochemical passivation layer on the surface of NCM523 particles is detected to be another important factor for the kinetic degradation.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Analytical
Xishan Zhao, De-An Zhang, Chuxiao Sun, Jiajun Liu, Tianming Zhao, Meng Wang, Yutong Song, Haowen Xu, Qi Wang
Summary: In this study, hollow S/FeS2@CNTs microspheres were synthesized by loading sulfur into hollow FeS2 microspheres with carbon nanotubes. The resulting cathode material for lithium-sulfur batteries exhibited high initial discharge capacity and excellent long-term cycling performance.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Multidisciplinary Sciences
Byeong-Gyu Chae, Seong Yong Park, Jay Hyok Song, Eunha Lee, Woo Sung Jeon
Summary: This study demonstrates the evolution of Li compositional gradient in the cathode after charge-discharge cycles using a complementary study via atom probe tomography and scanning transmission electron microscopy. The research shows that the depth of the Li concentration gradient expands proportionally with the number of cycles and the capacity to accommodate Li ions is determined by the degree of structural disordering.
NATURE COMMUNICATIONS
(2021)
Article
Sport Sciences
Eric T. Hedge, Kathryn A. Zuj, Alexander G. Stothart, Erica H. Gavel, Len S. Goodman, Andrew J. M. Buckrell, Sean D. Peterson
Summary: Continuous cooling of the inner forearms can help attenuate the rise of gastrointestinal temperature and reduce cardiovascular drift during exercise in hot and humid conditions, improving thermal comfort post-exercise.
JOURNAL OF SPORTS SCIENCES
(2021)
Article
Food Science & Technology
Fatima Fekraoui, Eric Ferret, Nathalie Paniel, Olivia Auvy, Clara Chamontin, Stephane Andre, Helene Simonin, Jean-Marie Perrier-Cornet
Summary: This study investigated the advantage of using high pressure cycling treatment compared to continuous high pressure treatment for the inactivation of bacterial spores. It was found that pressure cycling significantly reduced the number of viable spores, especially when faster compression and decompression rates were applied. However, the inactivation ratio was more correlated with cumulative exposure time to pressure rather than the cycling process effect.
INNOVATIVE FOOD SCIENCE & EMERGING TECHNOLOGIES
(2021)
Article
Nanoscience & Nanotechnology
Yibo Zhao, Yifan Wu, Huihui Liu, Sung-Liang Chen, Shou-Hang Bo
Summary: The study systematically distinguishes and quantifies different rates of lithium loss during cycling of lithium-metal batteries, finding that the formation of electrically isolated lithium metal (dead Li) is accelerated upon cycling, dominating the total lithium loss, while much slower rates of loss are associated with galvanic corrosion and formation of the solid-electrolyte interphase. Photoacoustic imaging reveals the distinct three-dimensional spatial distribution of dead Li, different from that of freshly deposited lithium. The research highlights the importance of quantitative studies on conventional and solid-state lithium-metal batteries for optimizing lithium-metal electrochemistry.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Energy & Fuels
Xiang Chen, Aihua Chu, Dan Li, Yinnan Yuan, Xueliang Fan, Yelin Deng
Summary: This study investigates the cycle life degradation characteristics of Ni-MH batteries in hybrid electric vehicles and establishes an empirical model of cycle life based on data from real-world driving settings, verifying the model's ability to characterize the battery's decay process effectively.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Sport Sciences
Keigo Takahashi, Yusuke Shirai, Shota Oki, Yoshiharu Nabekura
Summary: Running after cycling leads to increased cardiorespiratory responses, but has no significant effect on gait parameters. The decrease in SSC function after cycling may be the cause of these changes.
JOURNAL OF SCIENCE AND MEDICINE IN SPORT
(2022)
Article
Chemistry, Physical
Hiroyuki Nakano, Toshiyuki Matsunaga, Takuya Mori, Koji Nakanishi, Yoshiyuki Morita, Kazuto Ide, Ken-ichi Okazaki, Yuki Orikasa, Taketoshi Minato, Kentaro Yamamoto, Zempachi Ogumi, Yoshiharu Uchimoto
Summary: This study demonstrates the feasibility of using Cu/LaF3 model cells to achieve almost theoretical capacity under an atmosphere without impurities. The Cu/LaF3 battery exhibits superior cycle life at 80 degrees Celsius and shows feasibility for room-temperature operation.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Physical
Datong Zhang, Takahiro Yoshinari, Kentaro Yamamoto, Yuya Kitaguchi, Aika Ochi, Koji Nakanishi, Hidenori Miki, Shinji Nakanishi, Hideki Iba, Toshiki Watanabe, Tomoki Uchiyama, Yuki Orikasa, Koji Amezawa, Yoshiharu Uchimoto
Summary: A Cu-Pb nanocomposite was designed and tested as a room-temperature cathode material for all-solid-state fluoride-ion batteries, demonstrating high performance and good cyclability. Following electrochemical pretreatment, self-generated PbF2 acted as a fast fluoride-ion conductor, enhancing the kinetics of the Cu/CuF2 phase transition process.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Datong Zhang, Hiroyuki Nakano, Kentaro Yamamoto, Kenta Tanaka, Tatsuma Yahara, Kazuyuki Imai, Takuya Mori, Hidenori Miki, Shinji Nakanishi, Hideki Iba, Toshiki Watanabe, Tomoki Uchiyama, Koji Amezawa, Yoshiharu Uchimoto
Summary: This study investigated the modification of tetragonal beta-Pb0.78Sn1.22F4 for all-solid-state fluoride-ion batteries by annealing under various atmospheres, resulting in enhanced ionic conductivities. The rate-determining factor at the electrode/electrolyte interface reactions was found to be mass transfer, suggesting that developing high-conductivity solid electrolytes could lead to FIBs with superior rate capabilities similar to those of Li-ion batteries.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Masakuni Takahashi, Toshiki Watanabe, Kentaro Yamamoto, Koji Ohara, Atsushi Sakuda, Takuya Kimura, Seunghoon Yang, Koji Nakanishi, Tomoki Uchiyama, Masao Kimura, Akitoshi Hayashi, Masahiro Tatsumisago, Yoshiharu Uchimoto
Summary: This study quantitatively elucidated the cause of lithium dendrite suppression by doping LiI into Li3PS4 solid electrolyte, finding that the interface maintenance and inhibition of reductive decomposition play a key role in dendrite formation. Additionally, the dendrite suppression ability was enhanced with increased ionic conductivity, indicating the significant contributions of both the physical properties of the lithium metal/solid electrolyte interface and the bulk ionic conductivity.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Physical
Kota Ando, Yoshiharu Uchimoto, Takashi Nakajima
Summary: The irradiation of a single laser pulse onto the electrode assists the formation of bubbles, which can be used to probe the dissolved gas concentration on the electrode. The obtained concentrations agree well with inferred values through linear extrapolation of gas concentration in proximity to the electrode to the electrode surface.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Multidisciplinary Sciences
Hasnain Hafiz, Kosuke Suzuki, Bernardo Barbiellini, Naruki Tsuji, Naoaki Yabuuchi, Kentaro Yamamoto, Yuki Orikasa, Yoshiharu Uchimoto, Yoshiharu Sakurai, Hiroshi Sakurai, Arun Bansil, Venkatasubramanian Viswanathan
Summary: High-energy X-ray Compton measurements and first-principles modelling reveal how the electronic orbital responsible for the reversible anionic redox activity can be imaged and visualized, and its character and symmetry determined. Differential changes in the Compton profile with lithium-ion concentration are sensitive to the phase of the electronic wave function, and carry signatures of electrostatic and covalent bonding effects.
Review
Chemistry, Multidisciplinary
Kazuhiko Maeda, Fumitaka Takeiri, Genki Kobayashi, Satoru Matsuishi, Hiraku Ogino, Shintaro Ida, Takao Mori, Yoshiharu Uchimoto, Setsuhisa Tanabe, Tetsuya Hasegawa, Nobuhito Imanaka, Hiroshi Kageyama
Summary: This Account describes the recent progress in the development of new mixed-anion compounds by the MEXT mixed-anion project, focusing on the results related to the development of materials used as photocatalysts/photoelectrodes, phosphors, secondary battery components, conductors, and thermoelectric materials.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2022)
Article
Chemistry, Physical
Yanchang Wang, Kentaro Yamamoto, Yoshihiro Tsujimoto, Toshiyuki Matsunaga, Datong Zhang, Zulai Cao, Koji Nakanishi, Tomoki Uchiyama, Toshiki Watanabe, Tsuyoshi Takami, Hidenori Miki, Hideki Iba, Kazuhiko Maeda, Hiroshi Kageyama, Yoshiharu Uchimoto
Summary: All-solid-state fluoride-ion batteries offer high specific capacities, and Ruddlesden-Popper-type perovskite-related compounds serve as promising cathode materials due to reversible fluoride-ion (de)intercalations with low volume expansion. In this study, chemically fluorinated Ruddlesden-Popper compounds were synthesized and compared, revealing that oxygen substitution with fluorine in the apical sites can suppress phase transitions and improve power density.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Physical
Seunghoon Yang, Kentaro Yamamoto, Xiaohan Mei, Atsushi Sakuda, Tomoki Uchiyama, Toshiki Watanabe, Tsuyoshi Takami, Akitoshi Hayashi, Masahiro Tatsumisago, Yoshiharu Uchimoto
Summary: All-solid-state batteries (ASSBs) are considered as a potential future battery paradigm due to their safety and stability compared to lithium-ion batteries (LIBs). The use of graphite as an anode material in ASSBs offers superior power density compared to LIBs, but the overall power density is still lower. Coating LiI directly onto the graphite surface can improve discharge capacity and stabilize interface behavior.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Physics, Condensed Matter
Kosuke Suzuki, Yuji Otsuka, Kazushi Hoshi, Hiroshi Sakurai, Naruki Tsuji, Kentaro Yamamoto, Naoaki Yabuuchi, Hasnain Hafiz, Yuki Orikasa, Yoshiharu Uchimoto, Yoshiharu Sakurai, Venkatasubramanian Viswanathan, Arun Bansil, Bernardo Barbiellini
Summary: Understanding the nature of orbitals involved in the redox reactions of lithium-ion batteries is crucial for improving their capacity and energy density. The study of the magnetic Compton profiles of the LTMO compound provides insights into the role of Mn 3d magnetic electrons and 0 2p holes in the magnetic redox properties of LTMO.
Article
Physics, Applied
Aierxiding Abulikemu, Shenghan Gao, Toshiyuki Matsunaga, Hiroshi Takatsu, Cedric Tassel, Hiroshi Kageyama, Takashi Saito, Toshiki Watanabe, Tomoki Uchiyama, Kentaro Yamamoto, Yoshiharu Uchimoto, Tsuyoshi Takami
Summary: Researchers have discovered partial cation disorder in Li2MnO3 crystals synthesized under high pressure. Magnetization and specific heat measurements indicate the formation of long-range antiferromagnetic order below 35 K, with observed irreversibility and a peak suggesting coexistence of antiferromagnetic order and partial magnetic disorder.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Seunghoon Yang, Masakuni Takahashi, Kentaro Yamamoto, Koji Ohara, Toshiki Watanabe, Tomoki Uchiyama, Tsuyoshi Takami, Atsushi Sakuda, Akitoshi Hayashi, Masahiro Tatsumisago, Yoshiharu Uchimoto
Summary: To increase the energy density of all-solid-state batteries, researchers have proposed using Li metal as the anode. However, safety issues associated with lithium dendrites have been a concern. One proposed solution is to use lithium-halide doped Li3PS4 to suppress the formation of lithium dendrites. This study compared LiBr-doped Li3PS4 with LiI-doped Li3PS4 to investigate the reason for the excellent suppression of lithium dendrites by LiI. The results revealed that the suppression is due to the improvement of ionic conductivity and the formation of a stable interfacial layer.
SOLID STATE IONICS
(2022)
Article
Multidisciplinary Sciences
Kota Motohashi, Yosuke Matsukawa, Takashi Nakamura, Yuta Kimura, Naoaki Kuwata, Yoshiharu Uchimoto, Koji Amezawa
Summary: This study proposes a new material design for fast anion conductors, using flexible molecular cation as a host cation. It demonstrates successful fluoride ion conduction in NH4MgF3 and (NH4)2MgF4 based materials. The findings suggest the potential of molecular cation-containing compounds as attractive material groups for fast anion conductors.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
Chunxiao Zhang, Bo Wei, Meiyu Wang, Datong Zhang, Tomoki Uchiyama, Chaoping Liang, Libao Chen, Yoshiharu Uchimoto, Ruifeng Zhang, Peng Wang, Weifeng Wei
Summary: This study proposes a La/Al co-doping strategy to address the irreversibility of anionic redox reactions by tuning the electronic structure. The co-doped LMNLAO cathode exhibits outstanding cycling stability with a capacity retention of 93.6% after 200 cycles.
ENERGY STORAGE MATERIALS
(2022)
Article
Chemistry, Physical
Yadan Ren, Jun Oyama, Tomoki Uchiyama, Yuki Orikasa, Toshiki Watanabe, Kentaro Yamamoto, Tsuyoshi Takami, Yoshinori Nishiki, Shigenori Mitsushima, Yoshiharu Uchimoto
Summary: This study successfully observed the surface reconstruction of oxygen evolution reaction (OER) catalysts through the combination of ex situ and in situ techniques, confirming that surface reconstruction enhances the OER activity. This finding is of great significance for understanding the behavior of OER catalysts and can provide guidance for designing active catalysts.
ACS APPLIED ENERGY MATERIALS
(2022)
