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公开(公告)号：US20250023196A1
公开(公告)日：2025-01-16
申请号：US18686257
申请日：2022-08-17
Inventor： Shohei MASUDA , Kenichi NAGAMITSU , Nobuhiro SHIMAMURA , Nobutaka TAKEDA , Hideo SAKATA
IPC: H01M50/489 , H01M4/02 , H01M4/583 , H01M10/0525 , H01M50/417
Abstract: A disclosed electrochemical device includes a positive electrode, a negative electrode, an olefin-based separator, and a lithium ion-conductive electrolyte. The negative electrode includes a negative electrode current collector, and a negative electrode material layer supported on the negative electrode current collector. The negative electrode material layer includes a negative electrode active material into which lithium ions are reversibly doped. A surface layer portion of the negative electrode material layer has a film region, and when the film region is measured by X-ray photoelectron spectroscopy, a peak in an O1s spectrum is observed in a binding energy range of 530 to 534 eV. The peak intensity in the O1s spectrum increases from the surface layer of the film region to the inner side.
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公开(公告)号：US20250166933A1
公开(公告)日：2025-05-22
申请号：US18841607
申请日：2023-02-15
Inventor： Nao MATSUMURA , Hideki SHIMAMOTO , Hiroki HAYASHI , Hideo SAKATA
IPC: H01G11/28 , H01G11/06 , H01G11/48 , H01M4/02 , H01M4/1399 , H01M4/60 , H01M4/62 , H01M10/0525
Abstract: An electrochemical device disclosed includes a positive electrode, a negative electrode, and a lithium ion conductive electrolyte. The positive electrode includes a positive electrode mixture layer containing a positive electrode active material. The positive electrode active material contains particles of a conductive polymer to and from which anions are reversibly dopable and de-dopable. A ratio V1/V0 of a volume V1 of pores with a pore size of 0.2 μm or less to a volume V0 of all pores is 0.40 or more when a pore distribution of the positive electrode is measured using a mercury porosimeter.
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