Laminated quick-charge and quick-discharge sodium ion battery and preparation method thereof
CN119447500APending Publication Date: 2025-02-14NINGBO VEKEN BATTERY
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Patent Information
- Application Number
- CN202411452364.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2025-02-14
AI Technical Summary
Technical Problem
The energy density of sodium ion batteries is lower than that of lithium ion batteries, limiting their performance in fast charging applications.
Method used
A sodium ion battery with a stacked structure is used, using hard carbon material prepared from biomass as the negative electrode material and layered oxide prepared from transition metal oxide as the positive electrode material, combining an optimized electrolyte and separator design.
Benefits of technology
It realizes the fast charging and discharging performance of the battery, improves the energy density and battery life, and at the same time enhances the low and high temperature performance of the battery, extending the service life of the battery.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN119447500A_ABST
Abstract
The invention belongs to the technical field of sodium ion batteries, and relates to a laminated quick-charge and quick-discharge sodium ion battery. Layered oxide and hard carbon are mainly used as main materials of a positive electrode and a negative electrode, activated carbon black SP and carbon nanotubes CNT are used as conductive agents, traditional sodium carboxymethyl cellulose CMC, styrene-butadiene rubber SBR, polyvinylidene fluoride PVDF and a newly added acrylic acid copolymer aqueous binder PAA are used as binders, ethylene sulfate DTD is additionally added to an electrolyte, and the lithium ion battery is prepared. And the laminated sodium ion battery prepared in a laminated manner is excellent in quick charging and discharging performance, and meanwhile, the stability of long-period circulation is ensured. The high-temperature-resistant low-temperature-resistant cable has excellent low-temperature resistance and also shows good performance advantages in a high-temperature environment.
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