Article
Energy & Fuels
Lan Xia, He Miao, Fu Wang, Chunfei Zhang, Jiatang Wang, Jiapei Zhao, Jinliang Yuan
Summary: The study found that electrolytes with TTE and HFPM as cosolvents exhibit significantly improved cycling and rate properties for Li/NCM811 cells cycled between 2.7 and 4.3 V, compared to FEC-based electrolyte solutions without a fluorinated ether cosolvent.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Yasuhito Aoki, Mami Oda, Sachiko Kojima, Taihei Ishihama, Tsuyoshi Nagashima, Takayuki Doi, Minoru Inaba
Summary: The solid electrolyte interphase (SEI) formed on graphite in highly concentrated electrolyte solutions was thoroughly characterized by a combined experimental and computational study. The study revealed that the chemical composition and reduction vulnerability of SEI can be predicted through a profound understanding of density functional theory (DFT) calculations. The results indicate the potential for efficient design of electrolyte solutions by utilizing DFT calculations to predict the physicochemical properties of SEI.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Bhaskar Akkisetty, Konstantinos Dimogiannis, Joanne Searle, David Rogers, Graham N. Newton, Lee R. Johnson
Summary: This article reports a halogen-rich additive for sodium-ion battery electrolyte, enflurane, which can stabilize the interphase and improve the cycling performance of the electrode.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Qinping Jian, Tianshuai Wang, Jing Sun, Maochun Wu, Tianshou Zhao
Summary: The study formulates a new low-concentration electrolyte to improve the reversibility and stability of zinc anodes in aqueous zinc batteries. By adding DMSO into the electrolyte, a fluorinated interphase is formed on the zinc surface, suppressing dendrite formation and side reactions. This newly formulated electrolyte enables highly reversible zinc plating/stripping and significantly improves the cycle life of zinc batteries.
ENERGY STORAGE MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Xiaolong Li, Limin Guo, Jing Li, Erkang Wang, Tianfu Liu, Guoxiong Wang, Ke Sun, Chuntai Liu, Zhangquan Peng
Summary: As an important invention, the lithium-ion battery has changed human life, a new additive has been discovered to improve the electrolyte performance, bringing hope for the use of PC electrolyte in LIBs.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Longsheng Cao, Dan Li, Travis Pollard, Tao Deng, Bao Zhang, Chongyin Yang, Long Chen, Jenel Vatamanu, Enyuan Hu, Matt J. Hourwitz, Lin Ma, Michael Ding, Qin Li, Singyuk Hou, Karen Gaskell, John T. Fourkas, Xiao-Qing Yang, Kang Xu, Oleg Borodin, Chunsheng Wang
Summary: The study introduces an aqueous zinc battery with a solid-electrolyte interphase that enables excellent performance in various tests, demonstrating its potential for practical applications in energy storage.
NATURE NANOTECHNOLOGY
(2021)
Article
Chemistry, Physical
Ryo Okada, Yasuhito Aoki, Mami Oda, Mahiro Nakazawa, Minoru Inaba, Takayuki Doi
Summary: Highly concentrated electrolyte solutions with a single solvent were used to improve the charge/discharge cycle performance of Si electrodes. Diluting the solution and forming a thin surface film effectively suppressed electrode swelling.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Xiao-Xia Yang, Guan-Jun Zhang, Bao-Sheng Bai, Yu Li, Yi-Xiao Li, Yong Yang, Xian Jian, Xi-Wen Wang
Summary: This research uses graphite nanosheets as a carbon source and optimizes the fluorination process to prepare high-performance CFx NSs batteries, achieving higher specific capacity and energy density. Furthermore, new electrolytes and lightweight design strategies are introduced to enhance battery performance without affecting its function.
Article
Electrochemistry
Lukas Medenbach, Lea C. Meyer, Andrea Balducci
Summary: This study reports the first use of TMG and TEG solvents in potassium-based systems, demonstrating their effectiveness in intercalating and extracting potassium ions reversibly. The graphite electrodes with 1.5 M KFSI in TEG/VEC electrolyte exhibit stable intercalation capacity of 200 mAh g-1 for 40 cycles at C/10, comparable to conventional organic electrolytes.
ELECTROCHEMISTRY COMMUNICATIONS
(2021)
Article
Energy & Fuels
Shengxin Zhu, Le Yang, Jinbao Fan, Jiawei Wen, Xiaolong Feng, Peijun Zhou, Fuguo Xie, Jiang Zhou, Ya-Na Wang
Summary: In this study, an in-situ internal deformation measurement method was used to measure the circumferential strain of the 18650 LIB cell with different silicon content in the negative electrode, revealing that the internal strain is influenced by both electrode volume expansion and the gap between the jelly roll and steel case.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Chemistry, Physical
Zhenjie Cheng, Longfei Guo, Qingyu Dong, Chunting Wang, Qian Yao, Xin Gu, Jian Yang, Yitai Qian
Summary: Dual-ion batteries with graphite as the cathode suffer from structural damage and electrode/electrolyte interface instability, leading to poor electrochemical performance. Adding TMSP as an electrolyte additive can scavenge deleterious species and create a uniform cathode-electrolyte interphase layer on graphite, greatly improving the electrochemical performance.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Xueying Zheng, Zhang Cao, Wei Luo, Tong Zhao, Yan Han, Hao Yang, Xuyang Liu, Yu Zhou, Jiayun Wen, Yue Shen, Honghe Zheng, Yunhui Huang
Summary: This study improves the high-temperature operation and storage performance of Li-ion batteries by utilizing functional groups that form a solid-electrolyte interphase on the graphite surface. The designed interphase allows the use of propylene carbonate-based electrolyte and increases the capacity retention of the battery. Full cells with the modified graphite show improved performance after 300 cycles at 60°C, and a pouch cell with the modified graphite can operate for 200 cycles at 80°C.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Yulong Li, Jingliang Cheng, Xu Wang, Yang Liu, Xiangyang Liu
Summary: The thermal stability of fluorinated graphene (FG) was studied by synthesizing FG with different types and distributions of C-F/C(-F)(2) bonds, and monitoring the correlation between these bonds and the thermal stability using in situ heating infrared spectroscopy (in situ FTIR). It was found that the type and distribution of C-F bonds affected the thermal stability of FG, with isolated C-F bonds and C(-F)(2) bonds adjacent to the conjugated structure exhibiting the worst stability and detaching at low temperatures. Additionally, the evolution of conjugated structures in FG during thermal annealing was influenced by the type and distribution of C-F bonds.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Jens Matthies Wrogemann, Lukas Haneke, Thrinathreddy Ramireddy, Joop Enno Frerichs, Irin Sultana, Ying Ian Chen, Frank Brink, Michael Ryan Hansen, Martin Winter, Alexey M. Glushenkov, Tobias Placke
Summary: Dual-graphite batteries (DGBs) have gained attention as a low-cost technology for stationary energy storage. This study introduces a composite of black phosphorus with carbon (BP-C) as the negative electrode material for dual-ion batteries (DIBs) and investigates its electrochemical behavior.
Article
Nanoscience & Nanotechnology
Xiaoxia Jiao, Jin Wang, Guixia Gao, Xuezhi Zhang, Cuimei Fu, Lina Wang, Yonggang Wang, Tianxi Liu
Summary: This study introduces a stable quasi-solid lithium-metal battery with a specially designed material for a dense solid electrolyte interface, effectively inhibiting dendritic lithium growth, and improving the reversibility and safety of the battery.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Yasuhiro Domi, Hiroyuki Usui, Naoya Ieuji, Kei Nishikawa, Hiroki Sakaguchi
Summary: The study found that immersing the Li1.00Si electrode in an ionic liquid electrolyte causes part of the Li to desorb and transition to Si, while adding vinylene carbonate (VC) to the electrolyte can suppress this phase transition. Additionally, the desorbed Li was mainly used for the formation of a surface film, rather than eluting into the electrolyte from Li1.00Si.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Hiroyuki Usui, Yasuhiro Domi, Naoto Takada, Hiroki Sakaguchi
Summary: In this study, the reaction mechanism of InSb as an anode material for Na-ion battery was revealed for the first time, showing its excellent cyclability and reversible capacity. Compared to other antimony-based alloys, In has favorable properties for improving cyclability. Furthermore, even though Sn and In have similar properties, a SnSb electrode exhibited better performance, possibly due to the different reaction mechanism that allows the separated phases to return to the original phase. This knowledge is important for developing novel alloy-based anode materials with Na-active elements.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Chemistry, Multidisciplinary
Yasuhiro Domi, Hiroyuki Usui, Yoshiko Shindo, Akihiro Ando, Hiroki Sakaguchi
Summary: Despite the potential enhancement in electrode performance with a film derived from ionic-liquid electrolyte, the inability to reform a stable surface film in the organic-liquid electrolyte after the film breakdown is a significant limitation.
Article
Chemistry, Multidisciplinary
Yuta Kimura, Yasuhiro Domi, Hiroyuki Usui, Hiroki Sakaguchi
Summary: Substituting transition metal in silicide can improve the electrochemical performance of silicide/Si composite anode for lithium-ion batteries, with Cr0.5V0.5Si2/Si showing superior properties. The interaction between silicides and silicon has a significant impact on the stability of the electrode.
Article
Electrochemistry
Hiroyuki Usui, Yasuhiro Domi, Thi Hay Nguyen, Shin-ichiro Izaki, Kei Nishikawa, Toshiyuki Tanaka, Hiroki Sakaguchi
Summary: The crystal structure and Li storage properties of Cu-doped rutile TiO2 after lithiation-induced phase change were investigated. The results showed that Cu doping increased the interlayer distance and electronic conductivity of the layered structure LixTiO2, leading to a long cycle life and excellent rate capability as a lithium-ion battery anode.
Article
Electrochemistry
Yuta Kimura, Yasuhiro Domi, Hiroyuki Usui, Hiroki Sakaguchi
Summary: We evaluated the anode properties of silicide/Si composite electrodes and found that ternary silicide made by elemental substitution improved the electrochemical performance. Mechanical grinding and addition of fluoroethylene carbonate (FEC) into the electrolyte further improved the electrode performance. Mechanical grinding caused the formation of amorphous Si phase and fine dispersion of Cr0.5V0.5Si2, while FEC suppressed the continuous reductive decomposition of the electrolyte, contributing to the improvement in cyclability.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Hiroyuki Usui, Yasuhiro Domi, Eiji Iwama, Haruki Kurokawa, Hiroki Sakaguchi
Summary: The addition of Sb significantly improves the rapid capacity decay of Fe2O3 electrodes, enhances the conductivity of electrons and Na ions, suppresses the overpotential of Fe2O3 desodiation reactions, and improves the reversibility of Fe2O3 conversion reactions.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Energy & Fuels
Hiroyuki Usui, Shota Toriu, Yasuhiro Domi, Toshiyuki Tanaka, Hiroki Sakaguchi
Summary: In this study, Zn-doped TiO2 with a rutile-type structure was synthesized as a photoelectric conversion material, which successfully increased oxygen vacancy amount and electronic conductivity. Zn doping increased carrier concentration by widening the optical band gap, leading to enhancement of photovoltage and charge-discharge properties in TiO2/MnO2 composite electrodes. Further enhancement of properties was achieved by doping Fe into MnO2, increasing capacity from 13 to 25 mA h cm(-2). These results suggest that doping with impurity elements can improve the properties of electrode materials for use as photoelectrochemical capacitors.
JOURNAL OF ENERGY STORAGE
(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
Chemistry, Physical
Hiroyuki Usui, Yasuhiro Domi, Shin-ichiro Izaki, Akira Nasu, Atsushi Sakuda, Akitoshi Hayashi, Hiroki Sakaguchi
Summary: This study successfully prepared solid-state batteries composed of TiO2 anodes and a Li3BO3-Li2SO4-Li2CO3 solid electrolyte by room-temperature pressing. The batteries operated at 90 degrees C and showed reversible capacity. The doping of Nb or Ta into TiO2 significantly improved the anode's rate capability.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Review
Chemistry, Physical
Hiroyuki Usui, Yasuhiro Domi, Hiroki Sakaguchi
Summary: This paper reveals the reversible Na insertion-extraction reaction of rutile TiO2 as an anode material for Na-ion batteries and improves its performance by doping with impurity elements such as Nb5+, Ta5+, and In3+. A material chemistry methodology is introduced to enhance the anode properties of rutile TiO2 electrode by impurity doping, introduction of oxygen vacancies, formation of single-crystalline particles, and reduction of aspect ratio. This knowledge is effective not only for rutile TiO2 but also for anatase TiO2 and other titanium based oxides to create advanced high-performance anode materials.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Hiroyuki Usui, Yasuhiro Domi, Yuya Yamamoto, Takeo Hoshi, Toshiyuki Tanaka, Naoto Oishi, Noriko Nitta, Hiroki Sakaguchi
Summary: The effect of Ni doping on the Li+ diffusion behavior and its impact on high-rate and long-term performances of Li-ion batteries were investigated.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Electrochemistry
Tomoki Hirono, Hiroyuki Usui, Yasuhiro Domi, Takahiro Nishida, Wataru Irie, Toshiyuki Sawada, Hiroki Sakaguchi
Summary: The addition of Sn to SiOx electrode can improve the cycling life and discharge capacity, with the SiOx electrodes added with 1 or 3 wt% Sn achieving cycling lives of 250 or 360 cycles respectively. The reactivity of lithium ions in SiO2 matrix is enhanced by the improvement in electronic conductivity, resulting in a longer cycle life.
Article
Materials Science, Multidisciplinary
Yasuhiro Domi, Hiroyuki Usui, Takumi Ando, Hiroki Sakaguchi
Summary: This work investigates the influence of the crystalline phase of binary silicide on its lithiation and delithiation properties. The reversible capacity is found to be independent of the amount of Si included in the silicide and the composition of the silicide. The study confirms the absence of phase separation during the charge-discharge reactions of the silicide. A high reversible capacity is obtained when the transition metal has a strong affinity for Li and the distance between the Li atoms and the nearest-neighbour atom in lithiated silicide is large.
MATERIALS ADVANCES
(2022)
Article
Chemistry, Multidisciplinary
Tomoki Hirono, Hiroyuki Usui, Yasuhiro Domi, Wataru Irie, Toshiyuki Sawada, Hiroki Sakaguchi
Summary: The study prepared M/SiOx active materials using a low-cost mechanical milling method and added a third element to improve the conductivity of the SiO2 matrix. It was found that the addition of B and Sn improved the electron conductivity of SiOx and increased the cycle life, while the addition of Al did not show improvement.
