一种高熵电解液及其制备方法、高压锂离子电池
By using a high-entropy solvent system for a high-entropy electrolyte, the problem of electrolyte interface instability in high-voltage lithium-ion batteries was solved, thereby improving the cycle stability and energy density of the battery.
CN121123406BActive Publication Date: 2026-07-17HARBIN INSTITUTE OF TECHNOLOGY (SHENZHEN) (INSTITUTE OF SCIENCE AND TECHNOLOGY INNOVATION HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN)
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HARBIN INSTITUTE OF TECHNOLOGY (SHENZHEN) (INSTITUTE OF SCIENCE AND TECHNOLOGY INNOVATION HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN)
- Filing Date
- 2025-08-18
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
In existing high-voltage lithium-ion batteries, the electrolyte decomposes due to interfacial instability, resulting in poor cycle performance.
Method used
A high-entropy electrolyte is used, including lithium salt and a high-entropy solvent system composed of ethylene carbonate, dimethyl carbonate, ethyl methyl carbonate, diethyl carbonate, and dipropyl carbonate. The solvation structure is adjusted by hyperentropy to adapt to the charge and discharge process under high-voltage interface.
Benefits of technology
It significantly improves the battery's cycle stability, energy density, and lifespan, meeting the requirements for high capacity retention.
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Figure CN121123406B_ABST
Abstract
本申请适用于材料技术领域，提供一种高熵电解液及其制备方法、高压锂离子电池。所述高熵电解液包括锂盐和高熵溶剂；高熵溶剂由碳酸乙烯酯、碳酸二甲酯、碳酸甲乙酯、碳酸二乙酯、碳酸二丙酯组成。本申请通过碳酸乙烯酯、碳酸二甲酯、碳酸甲乙酯、碳酸二乙酯、碳酸二丙酯组合形成的高熵溶剂体系，通过超熵调节溶剂化结构，适配高压界面充放电，匹配新型正极，符合高容量保持率要求，显著提升电池循环稳定性、能量密度和使用寿命。
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