-
公开(公告)号:US20240282912A1
公开(公告)日:2024-08-22
申请号:US18548892
申请日:2022-03-17
Inventor: NOBUHIRO SHIMAMURA , KENICHI NAGAMITSU
IPC: H01M4/133 , H01M4/02 , H01M4/587 , H01M4/62 , H01M10/0525
CPC classification number: H01M4/133 , H01M4/587 , H01M4/625 , H01M10/0525 , H01M2004/021 , H01M2004/027
Abstract: The present disclosure provides a high-output electrochemical device with a low internal resistance, the electrochemical device including a positive electrode, a negative electrode, and an electrolyte having lithium ion conductivity. The negative electrode includes a negative current collector and a negative electrode mixture layer supported on the negative current collector. The negative electrode mixture layer contains a conductive additive and a negative electrode active material reversibly doped with a lithium ion. A surface area A per unit mass of the negative electrode mixture layer and a mass B of the negative electrode mixture layer supported on a unit area of the negative current collector on one surface satisfy a relationship of 200≤AB≤1,400.
-
2.
公开(公告)号:US20190067676A1
公开(公告)日:2019-02-28
申请号:US16074793
申请日:2017-02-21
Inventor: KENICHI NAGAMITSU , ATSURO SHIRAKAMI
IPC: H01M4/04 , H01M10/0525 , H01M10/0566 , H01M10/0585 , H01M10/0587 , H01M4/36 , H01M4/38 , H01M4/134 , H01G11/28 , H01G11/50 , H01G11/52 , H01G11/58 , H01G11/86 , H01G11/06
Abstract: A negative electrode for an electrochemical device includes: a negative current collector; a first negative electrode active material layer supported on a first surface of the negative current collector; and a second negative electrode active material layer supported on a second surface of the negative current collector. And capacity C1 per unit mass of the first negative electrode active material layer is greater than capacity C2 per unit mass of the second negative electrode active material layer. As a result, it is possible to provide a negative electrode suited for an electrochemical device having high capacitance, the electrochemical device being manufactured by pre-doping the negative electrode with lithium ions.
-
公开(公告)号:US20240170670A1
公开(公告)日:2024-05-23
申请号:US18548894
申请日:2022-03-17
Inventor: NOBUHIRO SHIMAMURA , KENICHI NAGAMITSU , TOUGO ENDOU
CPC classification number: H01M4/587 , H01M4/622 , H01M10/4235 , H01M2004/027 , H01M2300/0065
Abstract: The electrochemical device includes a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode. The negative electrode includes a negative electrode mixture layer, the negative electrode mixture layer contains a binding agent and a negative electrode active material reversibly doped with a lithium ion. The negative electrode active material contains non-graphitizable carbon. An average particle size of the binding agent is more than or equal to 140 nm. In a discharged state, a potential of the negative electrode is less than or equal to +0.2 V with respect to a potential of a Li counter electrode.
-
公开(公告)号:US20230025107A1
公开(公告)日:2023-01-26
申请号:US17906414
申请日:2021-03-29
Inventor: KENICHI NAGAMITSU
IPC: H01M4/60 , H01M10/0525
Abstract: An electrochemical device includes a positive electrode containing a positive electrode active material, a negative electrode containing a negative electrode active material, and an electrolytic solution. The positive electrode active material contains a conductive polymer, and the electrolytic solution contains anions with which the conductive polymer is doped and dedoped. In the discharged state, the concentration of the anions in the electrolytic solution is in the range from 1.1 mol/L to 1.6 mol/L, inclusive.
-
公开(公告)号:US20220328877A1
公开(公告)日:2022-10-13
申请号:US17614352
申请日:2020-06-24
Inventor: HIDEO SAKATA , NAO MATSUMURA , HIDEKI SHIMAMOTO , KENICHI NAGAMITSU , NOBUTAKA TAKEDA
IPC: H01M10/0568 , H01M10/0525 , H01M4/60 , H01G11/48 , H01G11/50 , H01G11/62
Abstract: An electrochemical device includes a positive electrode including a positive electrode active material, a negative electrode including a negative electrode active material, and an electrolytic solution. The positive electrode active material contains a conductive polymer, and the conductive polymer is configured to be doped and dedoped with anions. The electrolytic solution contains (a) a first salt of a lithium ion and a first anion and (b) a second salt of a lithium ion and a second anion. The first anion is a bis(sulfonyl)imide anion containing fluorine.
-
公开(公告)号:US20240213551A1
公开(公告)日:2024-06-27
申请号:US18546965
申请日:2022-02-22
Inventor: NOBUTAKA TAKEDA , KENICHI NAGAMITSU , HIDEO SAKATA
IPC: H01M10/42 , H01G11/28 , H01G11/34 , H01G11/62 , H01M4/133 , H01M4/587 , H01M10/052 , H01M10/0568 , H01M4/02
CPC classification number: H01M10/4235 , H01G11/28 , H01G11/34 , H01G11/62 , H01M4/133 , H01M4/587 , H01M10/052 , H01M10/0568 , H01M2004/021 , H01M2004/027 , H01M2300/0037
Abstract: An electrochemical device includes a positive electrode, a negative electrode, and an electrolyte having lithium ion conductivity. The negative electrode includes a negative current collector and a negative electrode material layer supported on the negative current collector. The negative electrode material layer contains a negative electrode active material capable of being reversibly doped with lithium ions. The negative electrode active material contains a carbon material. The negative electrode material layer includes a coating region on a surface layer portion of the negative electrode material layer. An O1s spectrum for the coating region has a peak in a range from 530 eV to 534 eV of a binding energy in an O1s spectrum. An intensity of the peak in the O1s spectrum increases as a measuring position changes from a surface layer of the coating region toward the inside of the coating region.
-
公开(公告)号:US20240128030A1
公开(公告)日:2024-04-18
申请号:US18549151
申请日:2022-03-17
Inventor: SHOHEI MASUDA , KENICHI NAGAMITSU , NAO MATSUMURA
Abstract: In a lithium-ion capacitor, the positive electrode includes a positive current collector and a positive electrode mixture layer. The positive electrode mixture layer contains a positive electrode active material. An electrostatic capacity of the positive current collector is less than or equal to 20 μF/cm2. The negative electrode includes a negative current collector and a negative electrode mixture layer. The negative electrode mixture layer contains a negative electrode active material. The electrolyte contains a first lithium salt and a second lithium salt. The first lithium salt is a lithium salt of a fluorine-containing inorganic acid, and the second lithium salt is a lithium salt of a fluorine-containing acid imide. A proportion of a molar concentration of the first lithium salt in a total molar concentration of the first lithium salt and the second lithium salt in the electrolyte is more than 0% and less than or equal to 35%.
-
公开(公告)号:US20230231133A1
公开(公告)日:2023-07-20
申请号:US17998946
申请日:2021-05-18
Inventor: KENICHI NAGAMITSU , NOBUHIRO SHIMAMURA
IPC: H01M4/587 , H01M10/0525 , H01M10/0562 , H01M4/133 , H01G11/42 , H01G11/66 , H01G11/58
CPC classification number: H01M4/587 , H01M10/0525 , H01M10/0562 , H01M4/133 , H01G11/42 , H01G11/66 , H01G11/58 , H01M2300/008 , H01M2004/021
Abstract: An electrochemical device includes a positive electrode, a negative electrode, and an electrolyte having lithium ion conductivity. The positive electrode includes a positive current collector and a positive electrode mixture layer supported on the positive current collector. The positive electrode mixture layer contains a positive electrode active material reversibly doped with an anion. The negative electrode includes a negative current collector and a negative electrode mixture layer supported on the negative current collector. The negative electrode mixture layer contains a negative electrode active material reversibly doped with lithium ions. The negative electrode active material contains non-graphitizable carbon. A ratio Mp/Mn of a mass Mp of the positive electrode active material supported on a unit area of the positive electrode to a mass Mn of the negative electrode active material supported on a unit area of the negative electrode is in a range from 1.1 to 2.5, inclusive.
-
公开(公告)号:US20230129000A1
公开(公告)日:2023-04-27
申请号:US17905645
申请日:2021-03-29
Inventor: NOBUTAKA TAKEDA , TAKUYA HIROBE , RYOTA MORIOKA , KENICHI NAGAMITSU
IPC: H01M4/60 , H01M4/137 , H01M50/102
Abstract: Electrochemical device 200 disclosed includes positive electrode 10 and negative electrode 20. Positive electrode 10 includes a positive electrode material layer. The positive electrode material layer contains particles of an active material and a conductive agent. The cohesive force between the particles of the active material and the conductive agent is greater than the cohesive force between the conductive agent.
-
公开(公告)号:US20230116180A1
公开(公告)日:2023-04-13
申请号:US17906418
申请日:2021-03-29
Inventor: KAZUYA MIYAFUJI , HIROKI HAYASHI , KENICHI NAGAMITSU
Abstract: An electrochemical device includes a positive electrode including a positive current collector and a positive electrode material layer supported on the positive current collector, a negative electrode, and an electrolytic solution. The positive electrode material layer includes a conductive polymer, and a surface roughness (Ra) of the positive current collector is in a range from 0.7 μm to 1.7 μm, inclusive.
-
-
-
-
-
-
-
-
-