Preparation method of three-dimensional microgap lithium-ion battery separator and lithium-ion battery
By embedding inorganic particles on the lithium-ion battery separator and cleaning it, a three-dimensional microgap structure is formed, which solves the problems of coating shedding and resistance increase, improves the tensile strength and electrolyte wettability of the separator, and improves battery performance.
CN118943641BActive Publication Date: 2025-09-05HUNAN SHANDE ENERGY STORAGE NEW MATERIALS RESEARCH INSTITUTE CO LTD
Patent Information
- Application Number
- CN202410988650.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2044-07-23
Smart Images
Figure CN118943641B_ABST
Abstract
The present application specifically discloses a method for preparing a three-dimensional microgap lithium-ion battery separator and a lithium-ion battery, the method comprising the following steps: S1, preparing a composite eutectic matrix; S2, preparing a first composite film; S3, embedding inorganic particles of a preset particle size onto the first composite film by spraying or rolling, so that both ends of the inorganic particles pass through the first composite film, thereby obtaining a second composite film; S4, cleaning the second composite film with a washing solution, and then immersing the cleaned second composite film in circulating pure water; S5, extracting and pore-forming the washed second composite film to obtain a third composite film with a porous structure; S6, thermally radiating the third composite film to obtain a three-dimensional microgap lithium-ion battery separator. The present application solves the technical problems in existing separator coating processes, such as coating shedding caused by the use of a large amount of adhesive and the high electrolyte interface resistance caused by the adhesive.
Need to check novelty before this filing date? Find Prior Art
Citation Information
Patent Citations
Diaphragm, preparation method of diaphragm and battery
CN112864531A
Separator and preparation method therefor, secondary battery using separator, battery module, battery pack, and electrical device
WO2024031652A1