单元堆叠-单体结构和包括其的全固态二次电池
By introducing an elastic layer with specific compressive strength into the all-solid-state secondary battery, the problem of poor contact caused by the change in the thickness of the negative electrode active material layer is solved, thereby improving the battery's coulombic efficiency and discharge efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SAMSUNG SDI CO LTD
- Filing Date
- 2023-01-20
- Publication Date
- 2026-07-17
AI Technical Summary
During the charging and discharging process, stress transfer caused by changes in the thickness of the negative electrode active material layer in all-solid-state secondary batteries leads to poor contact between the solid electrolyte layer and the negative electrode current collector, affecting the ion and electron conduction paths and reducing coulombic efficiency.
By introducing an elastic layer into the all-solid-state secondary battery, a compressive strength of 0.28 MPa to 0.6 MPa is ensured within a compression ratio range of approximately 40% to 70%. This absorbs volume changes in the negative electrode layer, improves the following properties of the negative electrode current collector, and maintains good contact conditions.
It improves the coulombic efficiency of the all-solid-state secondary battery, suppresses poor contact caused by changes in the thickness of the negative electrode active material layer, and ensures the stability and discharge efficiency of the battery.
Smart Images
Figure CN116470124B_ABST