Battery and electronic device
By preparing electrolytes with specific ratios of functional additives and polymerized monomers, and combining them with a low-temperature formation method to form an SEI film, the problems of high impedance and poor cycle performance of semi-solid-state batteries were solved, achieving a reduction in battery impedance and an improvement in cycle performance.
WO2025000559A1PCT designated stage expired Publication Date: 2025-01-02ZHUHAI COSMX BATTERY CO LTD
Patent Information
- Application Number
- PCT/CN2023/105429
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-06-30
- Publication Date
- 2025-01-02
AI Technical Summary
Technical Problem
How to reduce the impedance of semi-solid-state batteries and improve their cycle performance.
Method used
Electrolytes are prepared by using a specific ratio of functional additives and polymer monomers, and an SEI film is formed by a low-temperature formation method to improve the battery interface, reduce impedance, and improve cycle performance.
Benefits of technology
It effectively reduces battery impedance, improves battery cycle performance and conductivity, and enhances battery rate performance and temperature characteristics.
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Smart Images
Figure PCTCN2023105429-FTAPPB-I100001 
Figure PCTCN2023105429-FTAPPB-I100002 
Figure PCTCN2023105429-FTAPPB-I100003
Abstract
The present application provides a battery and an electronic device. A first aspect of the present application provides a battery, comprising an electrolyte. Dimethyl carbonate is injected into the battery; after standing for 36 hours, sampling is performed and gas chromatography analysis is performed on the liquid in the battery; and based on the capacity of the battery, the liquid injection amount of dimethyl carbonate is not lower than 2.5 g / Ah; there is a first characteristic peak at 3.65-4.50 min, and there is a second characteristic peak at 4.95-6.50 min. According to the battery provided by the present application, a first functional auxiliary agent with a peak output time of 3.65-4.50 min and a second functional auxiliary agent with a peak output time of 4.95-6.50 min are detected in an electrolyte residual component, and the first functional auxiliary agent and the second functional auxiliary agent can continuously exist, so that the battery interface can be improved, the impedance of the battery is reduced, and the cycle performance of the battery is improved.
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Citation Information
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