Faculty Profiles - KATAKURA Seiji

Papers - KATAKURA Seiji

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Memory of Stay at Argonne National Laboratory and at the University of Illinois Chicago

KATAKURA Seiji

Denki Kagaku Vol. 92 ( 3 ) page： 286 - 288 2024.9

Analysis of the intermediate states of an electrode slurry by electronic conductivity measurements

Takeno Mitsuhiro, Katakura Seiji, Miyazaki Kohei, Abe Takeshi, Fukutsuka Tomokazu

Carbon Reports Vol. 2 ( 2 ) page： 91 - 96 2023.6

Language：English Publishing type：Research paper (scientific journal) Publisher：The Carbon Society of Japan

The electronic resistance of composite electrodes for lithium-ion batteries has a non-negligible effect on the charge–discharge performance at high rates. In order to obtain an electrode with a high-rate performance it is important that conductive materials, such as acetylene black (AB), in the electrode slurry form a good electron conduction network. This study evaluated the electron conduction network of various electrode slurries made using different processes and with different solid contents using electronic conductivity measurements of the electrode slurries. The conductivity of the slurry showed a correlation with the rate performance. Depending on the production method and solid content, the conductivity of the slurry changed. The results suggest that the electron conduction network of the slurry is modified by collisions between the AB and active material particles during kneading and by stirring the slurry with excess solvent during dispersion. Measuring the conductivity of the slurry is expected to help determine the conditions of its manufacture.

DOI： 10.7209/carbon.020201

CiNii Research

Evaluation of static differential capacitance at the [C(4)mim(+)][TFSA(-)]/electrode interface using molecular dynamics simulation combined with electrochemical surface plasmon resonance measurements

Zhang Shiwei, Nishi Naoya, Katakura Seiji, Sakka Tetsuo

PHYSICAL CHEMISTRY CHEMICAL PHYSICS Vol. 23 ( 25 ) page： 13905 - 13917 2021.7

Relation between Mixing Processes and Properties of Lithium-ion Battery Electrode-slurry Open Access

TAKENO Mitsuhiro, KATAKURA Seiji, MIYAZAKI Kohei, ABE Takeshi, FUKUTSUKA Tomokazu

Electrochemistry Vol. 89 ( 6 ) page： 585 - 589 2021

Language：English Publishing type：Research paper (scientific journal) Publisher：The Electrochemical Society of Japan

The mixing process of electrode-slurry plays an important role in the electrode performance of lithium-ion batteries (LIBs). The dispersion state of conductive materials, such as acetylene black (AB), in the electrode-slurry directly influences the electronic conductivity in the composite electrodes. In this study, the relation between the mixing process of electrode-slurry and the internal resistance of the composite electrode was investigated in combination with the characterization of the electrode-slurries by the rheological analysis and the alternating current (AC) impedance spectroscopy. Some of the electrode-slurries showed higher value and gentler slope of the dynamic storage modulus in the low-angular-frequency region and higher thixotropic index than the others depending on the way of the mixing process and the AB content, agreeing with the low electronic volume resistivities of the corresponding composite electrodes and the electrode-slurries, which indicates the AB network growth. The results suggested that the low-viscosity state when AB and active electrode material are mixed contributes to the dispersive AB network.

DOI： 10.5796/electrochemistry.21-00076

Evolution and Reversible Polarity of Multilayering at the Ionic Liquid/Water Interface

Katakura Seiji, Amano Ken-ichi, Sakka Tetsuo, Bu Wei, Lin Binhua, Schlossman Mark L., Nishi Naoya

JOURNAL OF PHYSICAL CHEMISTRY B Vol. 124 ( 29 ) page： 6412 - 6419 2020.7

Effect of Switching the Length of Alkyl Chains on Electric Double Layer Structure and Differential Capacitance at the Electrode Interface of Quaternary Ammonium-Based Ionic Liquids Studied Using Molecular Dynamics Simulation

Katakura Seiji, Nishi Naoya, Kobayashi Kazuya, Amano Ken-ichi, Sakka Tetsuo

JOURNAL OF PHYSICAL CHEMISTRY C Vol. 124 ( 14 ) page： 7873-7883 2020.4

An electric double layer structure and differential capacitance at the electrode interface of tributylmethylammonium bis(trifluoromethanesulfonyl)amide studied using a molecular dynamics simulation.

Katakura S, Nishi N, Kobayashi K, Amano KI, Sakka T

Physical chemistry chemical physics : PCCP Vol. 22 ( 9 ) page： 5198-5210 2020.3

Potential-Dependent Structure of the Ionic Layer at the Electrode Interface of an Ionic Liquid Probed Using Neutron Reflectometry

Nishi Naoya, Uchiyashiki Junya, Ikeda Yoichi, Katakura Seiji, Oda Tatsuro, Hino Masahiro, Yamada Norifumi L.

JOURNAL OF PHYSICAL CHEMISTRY C Vol. 123 ( 14 ) page： 9223 - 9230 2019.4

Surface Structure of Quaternary Ammonium-Based Ionic Liquids Studied Using Molecular Dynamics Simulation: Effect of Switching the Length of Alkyl Chains

Katakura Seiji, Nishi Naoya, Kobayashi Kazuya, Amano Ken-ichi, Sakka Tetsuo

JOURNAL OF PHYSICAL CHEMISTRY C Vol. 123 ( 12 ) page： 7246-7258 2019.3

Static Capacitance at the Electrochemical Liquid-liquid Interface Between Ionic Liquids and Eutectic Ga-In Alloy Measured Using the Pendant Drop Method Open Access

NISHI Naoya, KOJIMA Yasuro, KATAKURA Seiji, SAKKA Tetsuo

Electrochemistry Vol. 86 ( 2 ) page： 38 - 41 2018

Language：English Publishing type：Research paper (scientific journal) Publisher：The Electrochemical Society of Japan

Static differential capacitance (Cdc) at the liquid-liquid interface between ionic liquids (ILs) and eutectic Ga-In alloy (EGaIn) has been measured using the pendant drop method for two ILs: 1-ethyl-3-methylimidazolium tetrafluoroborate ([C2mim+]BF4−) and 1-octyl-3-methylimidazolium bis(nonafluorobutanesulfonyl)amide ([C8mim+][C4C4N−]). The potentials of zero charge for the IL|EGaIn interfaces are shifted compared with the IL|Hg interfaces with an amount that can be considered by the difference in the work functions of EGaIn and Hg. The measured Cdc at the [C2mim+]BF4−|EGaIn interface has well reproduced the camel-shape potential dependence of Cdc at the Hg interface of the same IL at the negatively charged potential region. This suggests that there are little specific interaction between the IL ions with EGaIn and Hg. The [C8mim+][C4C4N−]|EGaIn has been compared with the [C8mim+]BF4−|Hg interface where IL-cation is the same but IL-anion is different. Also in that case, Cdc is similar to each other at the negatively charged potential region, which means that accumulated C8mim+ ions at the interface mainly govern the Cdc behavior.

DOI： 10.5796/electrochemistry.17-00081

A relationship between the force curve measured by atomic force microscopy in an ionic liquid and its density distribution on a substrate.

Amano KI, Yokota Y, Ichii T, Yoshida N, Nishi N, Katakura S, Imanishi A, Fukui KI, Sakka T

Physical chemistry chemical physics : PCCP Vol. 19 ( 45 ) page： 30504-30512 2017.11

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