Battery cell and method for producing a battery cell, battery device, energy storage system and electrical consumer

By employing a functionalized, layered solid electrolyte membrane in all-solid-state batteries, the problems of insufficient ionic conductivity and voltage resistance of solid electrolytes are solved, achieving efficient ion transport and improved stability, thereby enhancing battery safety and energy density.

CN122158648APending Publication Date: 2026-06-05JINKO SOLAR CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JINKO SOLAR CO LTD
Filing Date
2025-12-23
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

In existing all-solid-state batteries, the solid electrolyte has low ionic conductivity and voltage resistance, resulting in high interfacial impedance with the positive and negative electrodes, which affects the cycle stability of the battery.

Method used

The solid electrolyte membrane with a functionalized layered design includes a first layer of polymer matrix and lithium salt near the negative electrode, a second layer of niobium and titanium co-doped LLZO solid electrolyte, and a third layer of NCM coated with LiNbO3. The battery cell is formed by hot pressing, and the ratio and thickness of each layer are optimized to improve ion transport efficiency.

Benefits of technology

It reduces the interfacial impedance between the positive and negative electrodes, improves the battery's safety, energy density, and cycle stability, and enhances ion transport efficiency and battery cycle stability.

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Abstract

The embodiment of the application relates to the field of energy storage, and provides a battery monomer, a preparation method thereof, a battery device, an energy storage system and a power utilization equipment. The battery monomer comprises a positive electrode sheet, a solid-state electrolyte film and a negative electrode sheet, the solid-state electrolyte film comprises a first film layer, a second film layer and a third film layer which are sequentially stacked, the first film layer is close to the negative electrode sheet, and the third film layer is close to the positive electrode sheet; wherein the material of the first film layer comprises a first polymer matrix and a first lithium salt; the material of the second film layer comprises a second polymer matrix, a second lithium salt and a niobium and titanium co-doped LLZO solid-state electrolyte; and the material of the third film layer comprises a third polymer matrix, a third lithium salt and NCM coated with a LiNbO3 layer. The embodiment of the application reduces the interface impedance between the solid-state electrolyte film and the positive electrode sheet and the negative electrode sheet through functionalized layered design of the solid-state electrolyte film, improves the ion transmission efficiency, and thus helps to improve the safety, energy density and cycle stability of the battery.
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