固态电池、其制备方法、电池装置、用电装置和储能装置

By using gradient-pore hollow carbon fiber current collectors and active material layers in solid-state lithium batteries, directional deposition of lithium metal is achieved, solving the problems of dendrite penetration and interface contact failure in lithium batteries under high voltage, and improving the cycle life and safety of the batteries.

CN121862760BActive Publication Date: 2026-07-17ZHEJIANG JINKO ENERGY STORAGE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG JINKO ENERGY STORAGE CO LTD
Filing Date
2026-03-18
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Under high-voltage stacking conditions, the lithium metal anode in existing solid-state lithium batteries is difficult to control, which can easily lead to dendrite penetration, interface contact failure, and cycle volume expansion, resulting in structural collapse and affecting cycle life and safety.

Method used

A hollow carbon fiber current collector with a gradient pore size structure is used to guide the transport and deposition of lithium ions along the fiber axis through the synergistic effect of radial capillary pressure difference and stress gradient. Combined with the active material layer, a three-dimensional spatial constraint is formed to achieve the directional growth and orderly deposition of lithium metal, avoiding radial dendrite growth.

Benefits of technology

It effectively suppresses dendrite formation, enhances interfacial contact stability, extends battery cycle life, and improves safety and structural integrity under high-voltage conditions.

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Abstract

本申请实施例涉及储能领域，提供一种固态电池、其制备方法、电池装置、用电装置和储能装置，固态电池，包括：正极层；固态电解质层，位于正极层的一侧；复合负极层，位于固态电解质层背离正极层的一侧，复合负极层包括集流体层，集流体层包括多个沿第一方向延伸的中空的碳纤维，碳纤维包括内层以及位于内层外周的外层，外层具有多个第一孔隙，内层具有多个第二孔隙，第一孔隙的孔径大于第二孔隙的孔径，复合负极层还包括锂金属，锂金属至少位于内层背离外层的一侧、第一孔隙中和第二孔隙中。本申请实施例提供的固态电池至少可以改善难以对固态电池沉积负极金属的过程进行主动调控的问题。
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Citation Information

Patent Citations

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