公开(公告)号：US20220223871A1

公开(公告)日：2022-07-14

申请号：US17708495

申请日：2022-03-30

Applicant: Ningde Amperex Technology Limited

Inventor： Daguang LI ,  Maohua CHEN ,  Yuansen XIE ,  Peng DU

IPC: H01M4/62 ,  H01M10/052 ,  H01M4/04

Abstract: A protective material for a negative electrode of a lithium metal battery in this application includes a first protective layer and a second protective layer that are adjacent to each other. The first protective layer is contiguous to a lithium metal. Also, a method for manufacturing the protective material for a negative electrode of a lithium metal battery, and a method for manufacturing the negative electrode.

公开(公告)号：US20240162440A1

公开(公告)日：2024-05-16

申请号：US18390487

申请日：2023-12-20

Applicant: Ningde Amperex Technology Limited

Inventor： Zigui ZHENG ,  Zheng YI ,  Peng DU ,  Yuansen XIE

IPC: H01M4/587 ,  C01B32/05 ,  H01M4/133 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568 ,  H01M4/02

CPC classification number: H01M4/587 ,  C01B32/05 ,  H01M4/133 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568 ,  C01P2002/74 ,  C01P2004/03 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/40 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2300/0025

Abstract: A negative electrode includes a negative electrode active material layer, the negative electrode active material layer includes negative electrode active material particles, and the negative electrode active material particle includes a porous portion and a nonporous portion with heteroatoms. The heteroatom includes at least one of element boron, nitrogen, fluorine, phosphorus, or sulfur and is located on an interface, and the interface is a region, in the nonporous portion, formed from a bordering position between the nonporous portion and the porous portion to 0.5 μm from the bordering position. The porous portion improves the lithium ion intercalation and deintercalation efficiency. In addition, boron, nitrogen, and other elements doped increase the gram capacity of the negative electrode active material, helping increase the energy density of the electrochemical apparatus.