一种锂离子电池正极片的预锂化方法及应用
By using azobenzene lithium reagents for pre-lithiation of the positive electrode of lithium-ion batteries, the problems of fast rate and poor controllability of the chemical pre-lithiation process of the positive electrode are solved, uniform pre-lithiation is achieved, and the first coulombic efficiency and cycle life of the battery are improved.
CN117410594BActive Publication Date: 2026-07-17HEFEI GUOXUAN HIGH TECH POWER ENERGY
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HEFEI GUOXUAN HIGH TECH POWER ENERGY
- Filing Date
- 2023-10-31
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
The existing chemical pre-lithiation process of lithium-ion battery cathodes is too fast and has poor controllability, which easily leads to over-lithiation, resulting in irreversible capacity loss and damage to the cathode active material.
Method used
Azobenzene lithium reagent is used to pre-lithiate the positive electrode. By immersing the positive electrode in azobenzene lithium reagent, lithium ion insertion into the positive electrode is controlled, achieving uniform pre-lithiation and avoiding over-lithiation.
Benefits of technology
It improves the initial coulombic efficiency, energy density, and cycle life of lithium-ion batteries, and is simple to operate and easy to mass-produce.
✦ Generated by Eureka AI based on patent content.
Abstract
本发明公开了一种锂离子电池正极片的预锂化方法及应用。本发明提供的预锂化方法，包括如下步骤：将正极片浸泡在预锂化试剂中，清洗，干燥；所述预锂化试剂为偶氮苯锂类试剂。本发明提供的方法预锂化均匀，预锂化程度可控，解决了正极片化学预锂化过程存在的速率太快、可控性差，容易发生过度预锂化的问题，可补偿电池的首次不可逆容量损失，提高电池的首次库伦效率、能量密度和循环寿命。而且，该方法操作安全、简单，易于大规模量产。
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