المؤلفون: Peilu Jiang, Huangkai Zhou, Subin Song, Kota Suzuki, Kenta Watanabe, Yumi Yamaguchi, Naoki Matsui, Satoshi Hori, Ryoji Kanno, Masaaki Hirayama

المصدر: Communications Materials, Vol 5, Iss 1, Pp 1-14 (2024)

مصطلحات موضوعية: Materials of engineering and construction. Mechanics of materials, TA401-492

الوصف: Abstract All-solid-state lithium–sulfur batteries exhibit high energy densities, operate safely, and suppress polysulfide shuttling. However, their electrochemical performance is restricted by the insulating nature of sulfur and Li2S, and by severe cathode-related volumetric changes during cycling. Here, we prepare a Li2S-based cathode composite with high mixed-conductivity and stability, by infiltrating a Li2S–LiI active material solution into a mesoporous carbon replica with ~10-nm-sized pores, followed by mixing with a liquid-phase-synthesized Li6PS5Br solid electrolyte and vapour-grown carbon fibres. Benefiting from a mechanically reinforced, three-dimensional ion/electron-conducting structure, the cathode exhibits high discharge capacity (1009 mAh g−1, 20 cycles, 298 K, 0.05 C) and high reversible capacity (650 mAh g−1, 100 cycles, 298 K, 0.1 C). These findings underscore the feasibility of developing high-performance all-solid-state lithium-sulfur batteries by designing three-dimensional mixed-conducting mechanically robust cathodes.

وصف الملف: electronic resource

العلاقة: https://doaj.org/toc/2662-4443Test

الوصول الحر: https://doaj.org/article/a765bbee8987472083494e8e2fa93efeTest

المؤلفون: Junpei Nakayama, Huangkai Zhou, Jun Izumi, Kenta Watanabe, Kota Suzuki, Fumiya Nemoto, Norifumi L. Yamada, Ryoji Kanno, Masaaki Hirayama

المصدر: Advanced Materials Interfaces, Vol 11, Iss 5, Pp n/a-n/a (2024)

مصطلحات موضوعية: cathode–electrolyte interfaces, epitaxial film model electrodes, in‐situ neutron reflectometry, lithium cobalt oxides, lithium‐ion batteries, Physics, QC1-999, Technology

الوصف: Abstract Information on the cathode/organic–electrolyte interface structure provides clues regarding the rate and reversibility of lithium intercalation reactions in lithium‐ion batteries. Herein, structural changes within the LiCoO2 electrode, throughout the interphase region, and in the LiPF6/propylene carbonate electrolyte are observed concurrently by in situ neutron reflectometry. The formation of an electrical double layer (EDL) during the early stages of charging and discharging is investigated and compared with that at an intercalation‐inactive Nb:SrTiO3 electrode. At the intercalation‐inactive interface between Nb:SrTiO3 and the electrolyte, a voltage‐dependent ionic distribution corresponding to the EDL forms on the electrolyte side without the formation of a cathode/electrolyte interphase (CEI) layer. In contrast, at the intercalation‐active LiCoO2/electrolyte interface, a CEI layer forms immediately after cell construction, and the ionic distribution in the electrolyte formed outside the CEI layer scarcely changes upon voltage application. The CEI/electrolyte interface is shielded from potential changes by the electronically insulating CEI; therefore, structural changes in the EDL are restricted. This supports the prevailing understanding that the CEI layer defines the rates of solvation/de‐solvation and adsorption/desorption reactions of lithium ions.

وصف الملف: electronic resource

العلاقة: https://doaj.org/toc/2196-7350Test

الوصول الحر: https://doaj.org/article/27299f85d67b401b8aa5efa9640eba92Test

المؤلفون: Ryoji KANNO

المصدر: Electrochemistry. 2023, 91(10):102001

المؤلفون: Hanseul Kim, Jiang Peilu, Jinan Cui, Kota Suzuki, Masaaki Hirayama, Ryoji Kanno, Satoshi Hori, Yumi Yamaguchi

المصدر: Journal of the Ceramic Society of Japan. 2023, 131(10):717

المؤلفون: Atsunori Matsuda, Hanseul Kim, Hiroyuki Muto, Kazuhiro Hikima, Kenta Watanabe, Kota Suzuki, Masaaki Hirayama, Miho Sato, Naoki Matsui, Ryoji Kanno, Satoshi Hori, Satoshi Obokata, Takumi Yabuzaki

المصدر: Journal of the Ceramic Society of Japan. 2023, 131(10):675

المؤلفون: Hanseul Kim, Kenta Watanabe, Kota Suzuki, Masaaki Hirayama, Naoki Matsui, Ryoji Kanno, Takuma Noda

المصدر: Journal of the Ceramic Society of Japan. 2023, 131(10):651

المؤلفون: Dongho KANG, Kotaro ITO, Keisuke SHIMIZU, Kenta WATANABE, Naoki MATSUI, Kota SUZUKI, Ryoji KANNO, Masaaki HIRAYAMA

المصدر: Electrochemistry, Vol 92, Iss 3, Pp 037008-037008 (2024)

مصطلحات موضوعية: all solid-state battery, olivine-type cathode, amorphous li3po4 electrolyte, thin-film battery, Technology, Physical and theoretical chemistry, QD450-801

الوصف: A thin-film battery composed of a LiFePO4 cathode/Li3PO4 electrolyte/Li anode was fabricated on a Pt/Ti/Si (PTS) substrate via RF magnetron sputtering. The amorphous Li3PO4 film was densely stacked on a 60 nm-thick LiFePO4 film, which provided a suitable reaction field for understanding the electrochemical properties of LiFePO4 at the interface with the solid electrolyte. The LiFePO4 cathode film exhibited highly reversible lithium desertion/insertion at the interface at room temperature and 60 °C, without any side reactions. An irreversible oxidation reaction occurred during the initial charging process at 100 °C, leading to an increase in the charge-transfer resistance of the LiFePO4/Li3PO4 interface with no significant decrease in the lithium desertion/insertion capacity of LiFePO4. This result suggests the formation of a resistive interphase via the decomposition of Li3PO4 at 100 °C. A severe decrease in capacity is observed at 125 °C, which indicates the LiFePO4-side interface contributed to the side reactions. The film battery exhibits a severe decrease in capacity at 125 °C.

وصف الملف: electronic resource

العلاقة: https://www.jstage.jst.go.jp/article/electrochemistry/92/3/92_24-00017/_html/-char/enTest; https://doaj.org/toc/2186-2451Test

الوصول الحر: https://doaj.org/article/753e42963fed46428b0247570b8bc4a3Test

المؤلفون: Kazuhiro Hikima, Keisuke Shimizu, Hisao Kiuchi, Yoyo Hinuma, Kota Suzuki, Masaaki Hirayama, Eiichiro Matsubara, Ryoji Kanno

المصدر: Communications Chemistry, Vol 5, Iss 1, Pp 1-9 (2022)

مصطلحات موضوعية: Chemistry, QD1-999

الوصف: The electronic structure evolution within a battery during cycling can provide crucial cues for its optimization, but insights on operando band structures are extremely challenging to obtain. Here, the authors determine the overall band structure of a model thin-film solid-state lithium battery via operando hard X-ray photoelectron spectroscopy, considering the cathode and anode sides.

وصف الملف: electronic resource

العلاقة: https://doaj.org/toc/2399-3669Test

الوصول الحر: https://doaj.org/article/27f7c06c53404b35aa29bd4d2ac0c034Test

المؤلفون: Kota Suzuki, Masaaki Hirayama, Naoki Matsui, Ryoji Kanno, Yudai Iwamizu

المصدر: MATERIALS TRANSACTIONS. 2023, 64(1):287

المؤلفون: Tong-Tong Zuo, Raffael Rueß, Ruijun Pan, Felix Walther, Marcus Rohnke, Satoshi Hori, Ryoji Kanno, Daniel Schröder, Jürgen Janek

المصدر: Nature Communications, Vol 12, Iss 1, Pp 1-10 (2021)

مصطلحات موضوعية: Science

الوصف: Fundamental investigations at the electrode/electrolyte interface are essential for developing high-energy batteries. Here, the authors investigate the degradation mechanisms at the LGPS/NCM622 interface providing a quantitative model to interpret the interfacial resistance growth.

وصف الملف: electronic resource

العلاقة: https://doaj.org/toc/2041-1723Test

الوصول الحر: https://doaj.org/article/7259252c15494bdfa923ccb7d3f32443Test