Modified lithium supplementing agent li5al04 and preparation method thereof, positive electrode sheet and lithium ion battery

By modifying Li5AlO4 material, the carbonized carbon skeleton and metal oxides of MOF material are used to reduce the voltage plateau, which solves the problem of high voltage plateau and difficulty in realizing capacity of Li5AlO4 material, and improves the cycle performance and lithium replenishment effect of lithium-ion battery.

CN122403476APending Publication Date: 2026-07-17JIANGSU TIANHE ENERGY STORAGE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU TIANHE ENERGY STORAGE CO LTD
Filing Date
2025-01-15
Publication Date
2026-07-17

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Abstract

本申请涉及锂离子电池技术领域，具体提供一种改性Li5AlO4补锂剂及其制备方法、正极片、锂离子电池。旨在解决现有的Li5AlO4材料的导电性差及电化学活性低，电压平台高，容量难以发挥的问题。为此，本申请的改性Li5AlO4补锂剂的制备方包括以下步骤：提供锂源与MOF材料包覆的铝源材料的混合物；将混合物在无氧环境以及预设温度下进行烧结处理，得到改性Li5AlO4补锂剂；其中，预设温度能够使MOF材料进行碳化以及能够使锂源与铝源反应生成Li5AlO4。本申请所制备的改性Li5AlO4补锂剂的脱锂电位较低，其应用在电池中的补锂效果好，能够有效提升电池的循环性能。
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