公开(公告)号：US20240243361A1

公开(公告)日：2024-07-18

申请号：US18622184

申请日：2024-03-29

Applicant: Ningde Amperex Technology Limited

Inventor： Wenwen LI ,  Chao TANG

IPC: H01M10/0567 ,  H01M10/0525

CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M2300/004

Abstract: An electrochemical device and an electronic device. The electrochemical device includes a positive electrode plate, a negative electrode plate, an electrolyte solution, and a separator. A mass percent A of the electrolyte solution in a total mass of a battery cell is 2% to 8%. The electrolyte solution includes a sulfur-containing substance with a valence of S4+/S6+ or above. Based on a total mass of the electrolyte solution, a mass percent B of the sulfur-containing substance is 10% to 20%. By controlling the mass percent of the electrolyte solution and the use of the sulfur-containing substance and the fluorine-containing additive, the ionic conductivity of the SEI film is improved, and consumption of the electrolyte solution during cycling is reduced, thereby enhancing safety performance and cycle performance while reducing the electrolyte volume.

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.