Soft package battery with full carbon fibers as positive and negative electrodes and structural battery

By using a full carbon fiber composite current collector structure, the problems of insufficient conductivity and high interfacial resistance of carbon fiber electrodes are solved, realizing a lightweight, flexible and efficient energy storage battery design suitable for aerospace and new energy transportation.

CN122224852APending Publication Date: 2026-06-16XI AN JIAOTONG UNIV
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Patent Information

Application Number
CN202610346893.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-20
Publication Date
2026-06-16

AI Technical Summary

Technical Problem

In existing lithium-ion batteries, carbon fiber composite material structure batteries have problems such as insufficient current collector conductivity, excessive interface resistance, and difficulty in electrode integration, which cannot meet the comprehensive requirements of aerospace and electric transportation devices for lightweight, load-bearing capacity and safety.

Method used

Using all carbon fiber as the positive and negative electrodes, a composite current collector structure is formed by plating metal on the surface of the carbon fiber fabric. Combined with yarn unfolding and low-temperature plasma treatment, the positive and negative electrodes are prepared. The carbon fiber composite material is used as the electrode support skeleton to construct a symmetrical composite current collector structure, which reduces the interface resistance and improves conductivity and mechanical strength.

Benefits of technology

It achieves a lightweight, high-strength, and flexible electrode structure, which significantly improves the conductivity uniformity and electron transport efficiency of the battery. The electrode layer simultaneously bears the energy storage and structural loads, improving the functional integration and material utilization efficiency, and is suitable for aerospace and new energy transportation fields.

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Abstract

The invention belongs to the technical field of structural electrochemical energy devices, and particularly relates to a soft package battery with full carbon fibers as positive and negative electrodes and a structural battery. The soft package battery with the full carbon fibers as the positive electrode and the negative electrode comprises the positive electrode, the negative electrode, electrolyte, a diaphragm and an external packaging structure, carbon fiber fabric is sequentially subjected to yarn spreading and low-temperature plasma treatment to obtain treated carbon fibers, and the positive electrode is obtained by depositing Al plating layers on the front face and the back face of the treated carbon fibers and then coating the Al plating layers with a positive electrode active material; and the negative electrode is obtained by depositing Cu plating layers on the front and back surfaces of the treated carbon fiber and then coating a negative electrode active material on the Cu plating layers. By means of plating metal on the surface of the fiber, the problems of insufficient conductivity and overlarge interface resistance in the prior art are solved, and the dual performances of mechanical bearing and efficient energy storage are realized by utilizing the flexibility of the fiber and a mutual laminated structure of the positive electrode and the negative electrode.
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