公开(公告)号：US20240258570A1

公开(公告)日：2024-08-01

申请号：US18622476

申请日：2024-03-29

Applicant: Ningde Amperex Technology Limited

Inventor： Wenwen LI ,  Daguang LI ,  Wenhao GUAN ,  Maohua CHEN

IPC: H01M10/0568 ,  H01M4/02 ,  H01M4/131 ,  H01M10/052 ,  H01M10/0569

CPC classification number: H01M10/0568 ,  H01M10/052 ,  H01M10/0569 ,  H01M2004/021 ,  H01M2004/028 ,  H01M4/131 ,  H01M2300/0034 ,  H01M2300/004

Abstract: A lithium metal battery includes a positive electrode plate, a negative electrode plate, and an electrolyte. The electrolyte includes a lithium salt and a solvent. A molar concentration of the lithium salt is A mol/L, where 2≤A≤4. The solvent includes a first solvent. Based on a total mass of the solvent in the electrolyte, a mass percentage of the first solvent is B %, satisfying 10≤B≤50. The lithium metal battery satisfies a relation: 40≤A×B≤100. In the lithium metal battery and the electronic apparatus provided in this application, cycling performance and safety performance of the lithium metal battery are improved through the adjustment of components of a fluorine-containing solvent in the electrolyte and components and structure of an SEI film at a negative electrode side.

公开(公告)号：US20220302461A1

公开(公告)日：2022-09-22

申请号：US17708286

申请日：2022-03-30

Applicant: Ningde Amperex Technology Limited

Inventor： Wenhao GUAN ,  Maohua CHEN ,  Yuansen XIE

IPC: H01M4/66 ,  H01M10/052 ,  H01F1/055

Abstract: A magnetic current collector includes a permanent magnet material layer. In the permanent magnet material layer, remanence intensity of a permanent magnet material is 0 T to 2 T. The magnetic current collector can introduce a magnetic field into the lithium metal battery. The magnetic field interacts electromagnetically with an electric field exerted by the battery to quicken a mass transfer process of lithium ions at an interface between a negative electrode and an electrolytic solution, homogenize a current density generated by a lithium-ion flow on a surface of the negative electrode, quicken a mass transfer process of lithium ions in a direction parallel to the current collector, and homogenize the distribution of lithium ions, so as to suppress lithium dendrites and improve the cycle performance of the lithium metal battery.