Sodium-supplementing composite current collector and sodium ion battery

By designing a composite current collector structure, including a conductive layer, a sodium-compensating microporous layer and a catalytic layer, the problem of active sodium loss in sodium-ion batteries was solved, efficient sodium compensation was achieved, and the battery performance and life were improved.

CN223309006UActive Publication Date: 2025-09-05SHENZHEN YANYI NEW MATERIALS CO LTD
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Patent Information

Application Number
CN202521159482.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-06-09
Publication Date
2025-09-05
Estimated Expiration
2035-06-09

AI Technical Summary

Technical Problem

The irreversible loss of active sodium in existing sodium-ion batteries is serious, resulting in battery capacity decay and shortened cycle life. Traditional sodium replenishment methods have problems such as complex processes, high costs or limited effects, and conventional current collectors cannot actively participate in the sodium compensation process.

Method used

A composite current collector is designed, including a first conductive layer, a sodium-compensating microporous layer, a catalytic layer, and a second conductive layer stacked in sequence. Through specific material and parameter design, efficient and controllable sodium compensation is achieved to improve battery performance.

Benefits of technology

While maintaining high conductivity, efficient and controllable sodium compensation is achieved, thereby improving the overall performance of sodium-ion batteries, extending battery life and increasing battery capacity.

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Abstract

The utility model provides a sodium-supplementing composite current collector and a sodium ion battery. The composite current collector comprises a first conducting layer, a sodium-supplementing microporous layer, a catalyst layer and a second conducting layer which are sequentially stacked. According to the utility model, through the specific structural design of the composite current collector, efficient and controllable sodium compensation can be realized while high conductivity is maintained, so that the overall performance of the sodium ion battery is improved.
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