负极集流体、无负极锂金属二次电池及其制备方法

By using an ultra-thin interface layer and optimizing the electrolyte composition in a cathode-free lithium metal battery, the problems of uneven lithium deposition and side reactions were solved, achieving efficient lithium-ion adsorption and deposition, improving the battery's energy density and coulombic efficiency, and providing a high-performance lithium metal secondary battery solution.

CN117317237BActive Publication Date: 2026-07-17SHANGHAI JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI JIAOTONG UNIV
Filing Date
2023-05-04
Publication Date
2026-07-17

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Abstract

本申请涉及一种负极集流体，该负极集流体包括导电金属层以及设置在该导电金属层之上的超薄界面层，该超薄界面层的厚度小于或等于500纳米，且由二氧化锗和三乙胺的反应产物制成。本申请还涉及一种包括该负极集流体的无负极锂金属二次电池及其制备方法。通过对超薄界面层和电解液组分的优化调控，实现了电池库伦效率和循环性能的同步提升。此外，衍生的叔胺和锂锗合金具有优异的吸附能，显著促进了锂离子的吸附、成核和沉积，实现了锂沉积 / 剥离时的可逆膨胀 / 收缩过程。本发明提出的含超薄界面层的无负极锂金属二次电池具有高能量密度、高库伦效率和低成本等特点，为发展高性能二次电池提供全新的思路和方案。
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