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：US20220320484A1

公开(公告)日：2022-10-06

申请号：US17708300

申请日：2022-03-30

Applicant: Ningde Amperex Technology Limited

Inventor： Maohua CHEN ,  Daguang LI ,  Xiaoping LIN ,  Yuansen XIE

IPC: H01M4/134 ,  H01M10/052 ,  H01M4/36 ,  H01M4/62

Abstract: An electrochemical device includes a negative electrode. The negative electrode includes a current collector layer, a lithium metal layer, and a porous framework layer that are arranged in sequence. The porous framework layer is partly intercalated in the lithium metal layer. A thickness by which the porous framework layer is intercalated in the lithium metal layer is 0.2 μm to 50 μm. The electrochemical device achieves excellent cycle performance and relatively high safety and reliability.

公开(公告)号：US20230006209A1

公开(公告)日：2023-01-05

申请号：US17941409

申请日：2022-09-09

Applicant: Ningde Amperex Technology Limited

Inventor： Daguang LI ,  Maohua CHEN

IPC: H01M4/62 ,  H01M10/0525 ,  H01M4/134 ,  H01M4/38 ,  H01M4/66

Abstract: An anode plate, and a battery and electronic apparatus using such electrode plate, where the anode plate includes a porous anode skeleton, a lithiophilic substance whose concentration presents gradient distribution inside the porous anode skeleton, and a current collector. This application can relieve the anode plate from volume swelling during cycling, and inhibit the growth of lithium dendrites, thereby improving the safety performance and cycling performance of lithium-ion batteries.

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：US20230027113A1

公开(公告)日：2023-01-26

申请号：US17951480

申请日：2022-09-23

Applicant: Ningde Amperex Technology Limited

Inventor： Daguang LI ,  Maohua CHEN ,  Yuansen XIE

IPC: H01M4/38 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M4/134

Abstract: An assembly includes: an electrolytic solution, where the electrolytic solution includes a solvent and an additive, the additive includes fluoroethylene carbonate, and a weight percent of the fluoroethylene carbonate in a total mass of the solvent and the additive is 10% to 30%; and a negative electrode, where the negative electrode contains an active material and a protection layer that covers the active material. The protection layer is located between the electrolytic solution and the active material, the protection layer is in contact with the electrolytic solution, the active material contains lithium metal, and the protection layer contains silicon. The electrode assembly greatly improve the cycle performance of a lithium metal battery.