Lithium ion battery

By using lithium cobalt oxide and ternary nickel-cobalt manganese oxide as the positive electrode active material in lithium-ion batteries and applying a double-layer active material layer on the negative electrode current collector, the high energy density and fast charging capability of lithium-ion batteries are solved. The shortcomings in the field of energy density and fast charging performance have been achieved, ensuring the safety and efficiency of the battery.

CN119419210AActive Publication Date: 2025-02-11SPRINGPOWER TECHNOLOGY (SHENZHEN) CO LTD
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Patent Information

Application Number
CN202510021146.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-07
Publication Date
2025-02-11
Estimated Expiration
2045-01-07

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Abstract

In order to solve the problem that in the prior art, the requirements of a lithium ion battery for high energy density and fast charging capacity are increasingly increased, the invention provides a lithium ion battery, a positive electrode piece comprises a positive electrode active material layer, a positive electrode active material of the positive electrode active material layer comprises lithium cobalt oxide and / or ternary nickel cobalt manganese oxide, and a negative electrode active material of the positive electrode active material layer comprises lithium cobalt oxide and / or ternary nickel cobalt manganese oxide. The mass ratio of the lithium cobalt oxide in the positive electrode active material is a%, a is greater than or equal to 0 and less than or equal to 100, the mass ratio of the ternary nickel cobalt manganese oxide in the positive electrode active material is b%, b is greater than or equal to 0 and less than or equal to 100, a% + b% is 100%, the compaction density of the positive electrode plate is Rho g / cm < 3 >, and Rho is greater than or equal to 4.1 * a% + 3.3 * b% and less than or equal to 4.4 * a% + 3.8 * b%; the negative pole piece comprises a negative pole active material layer, the negative pole active material layer comprises a first active coating close to the negative pole current collector and a second active coating far away from the negative pole current collector, and a negative pole active material of one of the first active coating and the second active coating is a capacity type material; and the other negative electrode active material is a rate type material.
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Citation Information

Patent Citations

  • High-energy-density lithium ion battery and preparation method

    CN107785542A

  • Positive electrode material and preparation method and application thereof

    CN115714174A

  • Medium-high-nickel low-cobalt ternary positive electrode material and preparation method thereof

    CN116247179A

  • Negative plate, lithium ion battery and preparation method

    CN116682939A

  • Secondary battery

    CN118120086A

Cited By

  • Lithium-ion battery

    WO2026149251A1