Secondary battery and electric device
WO2026124281A1PCT designated stage Publication Date: 2026-06-18CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
- Filing Date
- 2025-12-01
- Publication Date
- 2026-06-18
AI Technical Summary
⚠Technical Problem
Nickel-iron-manganese layered metal oxide cathode materials are easily oxidized in secondary batteries, decomposing the electrolyte solvent to produce RH+, which leads to severe gas generation during high-temperature storage and affects cycle performance.
⚗Method used
NaaMbNicFedMneO2 was used as the positive electrode active material. Cyclic sulfate compounds and propylene carbonate compounds were added to the non-aqueous electrolyte to form a stable SEI film, which inhibited RH+ generation and oxidation gas production.
🎯Benefits of technology
It improves the cycle performance and high-temperature storage gas generation of secondary batteries, thereby enhancing battery stability and lifespan.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN2025139066_18062026_PF_FP_ABST
Abstract
A secondary battery and an electric device, relating to the technical field of secondary batteries. NaaMbNicFedMneO2 is used as a positive electrode active material. A propylene carbonate compound is used as an electrolyte solvent, wherein the activity of H in the propylene carbonate compound is low, such that the propylene carbonate compound has good oxidation resistance, thereby inhibiting the formation of RH+ to a certain extent, and achieving the effect of inhibiting gas generation from reduction at a negative electrode. Moreover, when a nickel-iron-manganese layered metal oxide is used as the positive electrode active material, a cyclic sulfate compound is used as an additive, so that a CEI film can be formed on a positive electrode, thereby inhibiting gas generation from the oxidative decomposition of an electrolyte by a sodium layered oxide, and reducing the formation of RH+. Moreover, since the reduction potential of the cyclic sulfate compound is higher than that of the propylene carbonate compound, the cyclic sulfate compound can form an SEI film before the reduction of the propylene carbonate compound at the negative electrode, thereby inhibiting the formation of the oxidation product RH+ and gas generation from reduction of the electrolyte solvent at the negative electrode.
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