公开(公告)号：US11978896B2

公开(公告)日：2024-05-07

申请号：US17267979

申请日：2019-08-01

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Toshiyuki Nakamori ,  Yasunobu Iwami ,  Mai Yokoi ,  Yohei Uchiyama

IPC: H01M4/48 ,  H01M4/02 ,  H01M4/36 ,  H01M4/38 ,  H01M10/0525

CPC classification number: H01M4/48 ,  H01M4/364 ,  H01M4/366 ,  H01M4/386 ,  H01M10/0525 ,  H01M2004/027 ,  H01M2004/028 ,  H01M2300/0017

Abstract: A negative electrode active material according to one embodiment of the present disclosure comprises: a composite oxide phase that contains Li, Si, Al and B; and Si particles that are dispersed in the composite oxide phase. Relative to the total number of moles of elements (excluding O) contained in the composite, oxide phase, the content of Li is from 5% by mole to 20% by mole (inclusive), the content of Si is from 50% by mole to 70% by mole (inclusive), the content of Al is from 12% by mole to 25% by mole (inclusive), and the content of B is from 12% by mole to 25% by mole (inclusive).

公开(公告)号：US20220037643A1

公开(公告)日：2022-02-03

申请号：US17275247

申请日：2019-09-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yasunobu Iwami ,  Nobumichi Nishida ,  Takaharu Morikawa ,  Mai Yokoi ,  Toshiyuki Nakamori

IPC: H01M4/36 ,  H01M4/133 ,  H01M4/134 ,  H01M4/136 ,  H01M4/38 ,  H01M4/48 ,  H01M4/58 ,  H01M4/587 ,  H01M10/0525

Abstract: The purpose of the present invention is to provide a nonaqueous electrolyte secondary battery which has excellent charge/discharge cycle characteristics. A nonaqueous electrolyte secondary battery negative electrode which is an example of an embodiment of the present invention comprises, as negative electrode active materials, a carbon active material and a Si active material comprising Si particles dispersed in an oxide phase containing at least silicon (Si). The Si active material includes a first Si active material and a second Si active material. The first Si active material has a median size on a volume basis that is greater than that of the second Si active material and has an Si particle content that is higher than that of the second Si active material.

公开(公告)号：US20210167372A1

公开(公告)日：2021-06-03

申请号：US17267979

申请日：2019-08-01

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Toshiyuki Nakamori ,  Yasunobu Iwami ,  Mai Yokoi ,  Yohei Uchiyama

IPC: H01M4/48 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/38

Abstract: A negative electrode active material according to one embodiment of the present disclosure comprises: a composite oxide phase that contains Li, Si, Al and B; and Si particles that are dispersed in the composite oxide phase. Relative to the total number of moles of elements (excluding O) contained in the composite, oxide phase, the content of Li is from 5% by mole to 20% by mole (inclusive), the content of Si is from 50% by mole to 70% by mole (inclusive), the content of Al is from 12% by mole to 25% by mole (inclusive), and the content of B is from 12% by mole to 25% by mole (inclusive).