Natriumionenbatteriezelle, Positivelektrodenfolie, Herstellungsverfahren dafür und Zugehörige Vorrichtung

Details

Veröffentlichungs-Nr.

EP4804257

Anmeldetag

8. Mai 2024

Veröffentlichung

15. Mai 2025

Rechtsraum

EP

Abstract

A sodium ion battery cell, a positive electrode sheet, a preparation method therefor and a related device. The sodium ion battery cell comprises a positive electrode sheet, the positive electrode sheet comprising a positive electrode active material and a solid electrolyte interphase film at least bonded to the surface of the positive electrode active material, and the solid electrolyte interphase film comprising one or multiple cations from Na⁺, Li⁺, K⁺ and Ca²⁺. The solid electrolyte interphase film bonded to the surface of the positive electrode active material comprises cations such as Na^-, Li⁺, K⁺ and Ca²⁺, and the cations can participate in electrochemical reactions of the sodium ion batteries to provide reversible capacity, so as to compensate for the capacity loss caused by the passivation of the positive electrode active material, thus improving the cycle performance of batteries. Additionally, the solid electrolyte interphase film comprising the cations helps to reduce the impedance of batteries, thus further improving the cycle performance of batteries.

Anmelder

Firma

Contemporary Amperex Technology Co., Limited

Land

🇨🇳 China